Pressure Temperature Conditions of the Otrøy Omphacite-Garnet Gneiss

Independent Project at the Department of Earth Sciences Självständigt arbete vid Institutionen för geovetenskaper

2015: 18

Pressure Temperature Conditions of the Otrøy Omphacite-Garnet Gneiss, Western Gneiss Region, Scandinavian Caledonides Tryck- och temperaturbestämningar på omphacit- granatförande gnejs från Otrøy, Western Gneiss Region, Skandinaviska Kaledoniderna

Johanna Holmberg

DEPARTMENT OF

EARTH SCIENCES

INSTITUTIONEN FÖR

GEOVETENSKAPER

Independent Project at the Department of Earth Sciences Självständigt arbete vid Institutionen för geovetenskaper

2015: 18

Johanna Holmberg

Tryck- och temperaturbestämningar på omphacit-granatförande gnejs från Otrøy, Western Gneiss Region, Skandinaviska Kaledoniderna Johanna Holmberg

Granat-omphacitförande gnejser från ön Otrøy i Western Gneiss Region (WGR), Norge, Skandinaviska Kaledoniderna, har undersökts i den här studien. WGR är ett av världens mest studerade områden för ultrahögtryckmetamorfa bergarter. I den här typen av gnejser förekommer linser av ultrahögtrycksbergarter så som granat- peridotiter och eklogiter. I den studerade Otrøygnejsen förekommer bland annat phengit och omphacit med inneslutningar av sannolika pseudomorfer efter coesit. Detta visar på att Otrøygnejsen troligen har bildats under metamorfos vid ultrahöga tryck. Geotermobarometriundersökningen, baserat på granat + clinopyroxen + phengitsystemet, visar att tryck- och temperaturförhållandena var ca 880 ˚C och 2.2 GPa. Det innebär att gnejsen metamorfoserats inom intervallet karaktäristiskt för högtrycksmetamorfos. Likväl kan det fastställas att Otrøygnejsen bildats till följd av en djup subduktion under kontinent-kontinentkollision. Den här studien bidrar till en ökad förståelse av processerna som påverkar den kontinentala skorpan vid djup subduktion och vidgar våra kunskaper om den komplexa metamorfa och tektoniska utvecklingen i WGR och de Skandinaviska Kaledoniderna.

Nyckelord: Western Gneiss Region, Otrøy, gnejs, ultrahögtrycksmetamorfos

Självständigt arbete i geovetenskap, 1GV029, 15 hp, 2015 Handledare: Jaroslaw Majka Institutionen för geovetenskaper, Uppsala universitet, Villavägen 16, 752 36 Uppsala (www.geo.uu.se)

Hela publikationen finns tillgänglig på www.diva-portal.org

Abstract

Pressure Temperature Conditions of the Otrøy Omphacite-Garnet Gneiss, Western Gneiss Region, Scandinavian Caledonides Johanna Holmberg

Garnet-omphacite gneisses from the island of Otrøy situated in Western Gneiss Region (WGR), Norway, Scandinavian Caledonides, were examined within this study. The WGR is one of the planets most studied ultra-high pressure (UHP) terranes. The studied gneisses are hosts for UHP garnet peridotites and eclogites. The presence of the high pressure mineral assemblage including e.g. omphacite and phengite together with assumed remnants of pseudomorphic transition of formerly stable coesite present in omphacite and garnet, suggest formation of the Otrøy gneisses during ultrahigh pressure metamorphism (UHPM). However, geothermobarometry based on the mineral assemblage composed of garnet + clinopyroxene + phengite yielded pressure-temperature conditions of c. 880˚C and 2.2 GPa, characteristic for just high pressure metamorphism. Nevertheless, it can be concluded that the Otrøy gneisses were formed due to the deep burial of continental crust during the continent-continent collision. This study provides insights into the understanding of the deep subduction of continental crust and expands our knowledge about the complex metamorphic and tectonic evolution of the WGR and the Scandinavian Caledonides.

Key words: Western Gneiss Region, Otrøy, gneiss, ultrahigh-pressure metamorphism

Independent Project in Earth Science, 1GV029, 15 credits, 2015 Supervisor: Jaroslaw Majka Department of Earth Sciences, Uppsala University, Villavägen 16, SE-752 36 Uppsala (www.geo.uu.se)

The whole document is available at www.diva-portal.org Table of contents 1. Introduction 1 2. Geological Background 3 3. Methods 7 3.1 Light Microscope 7 3.2 Electron Microprobe Analysis 7 3.3 Geothermobarometry 7 4. Results 8 4.1 Light Microscopy 8 4.2 Electron Microprobe Analysis 12 4.3 Geothermobaromethry 17 5. Discussion 18 6. Acknowledgements 19 7. References 20 8. Appendix 22

1 Introduction

Western Gneiss Region (WGR) of the Norwegian Caledonides, western part of the Scandinavian Caledonides (figure 1), is famous in many ways, for example by the presence of eclogites and mantle derived garnet peridotites. The WGR terrane provides an excellent view of high pressure and ultra-high pressure metamorphism (UHPM) (Cuthbert et al., 2000). UHPM conditions are generally found in rocks of ultramafic to mafic composition, such as eclogites and garnet peridotites. Where the most significant UHP indicators are garnet and clinopyroxene (Schertl & O’Brien, 2013). Nowadays there are over 20 discovered ultra-high pressure terranes widely distributed around the world, mainly occuring in continent-continent collisional belts (Gilotti, 2013). The Scandinavian Caledonides are a product of such a collisional event, between the paleo continents Baltica and Laurentia, which happened in Silurian. One of the world’s largest ultra-high pressure domains, is the Western Gneiss Region of Norway (Root et al., 2005). During recent years there have been an increasing number of discoveries of ultra-high pressure metamorphic domains along the coastal areas of the Western Gneiss Region. These UHPM occurrences are dominantly represented by quartz-bearing eclogites that have survived the retrogression to amphibolite facies. These eclogites are present in the prevailing crustal gneisses (Cuthbert et al., 2000 ; Carswell et al., 2006). Evidence of UHPM is mineralogical and it is commonly represented by coesite or poly-crystalline quartz (PCQ- former coesite) that are preserved in garnet, omphacite or zircon (Carswell et al., 2006). Coesite and PCQ are also recognized inclusions in kyanite and zoesite in eclogites (Cuthbert et al., 2000). The recognition of diamond and coesite in the continental crustal rocks (i.e. gneisses) has eroded the general idea that continents withstand subduction due to their buoyancy. Coesite and diamond are the most significant index minerals for ultra-high pressure metamorphism. Thus they are solid evidence of the crustal rocks tour down to mantle depths and back to Earth’s surface (Gilotti, 2013). Continental crustal rocks commonly carry feldspar. The plagioclase stability field placed far below the conditions of UHP. In higher pressure, plagioclase decompose to jadeite and quartz. The stability of potassium feldspar reaches much greater pressures. Phengitic white mica, a combination of celadonite and muscovite, is the leading potassium phase in the UHP rocks. A high content of silicon in phengite is an excellent indicator of UHPM. Geothermobarometry based on phengite together with clinopyroxene and garnet has demonstrated to be effective to establish pressure-temperature conditions of the UHP rocks (Schertl & O’Brien, 2013). In WGR the presence of mantle derived garnet peridotite, composed of various amounts of olivine + garnet ± pyroxene, incorporated in the quartzofeldspathic crust, is a further significant indication that the continental crust have been buried down to mantle depths (Gilotti, 2013). This phenomenon together with the discovery of microdiamonds in the subducted surrounding crustal rocks, implies that they could have shared the similar tectonic history during the Scandian orogeny 420-390 million years ago, by the time when the continental crust of Baltica was subducted down to ≥ 120 km (Spengler et al., 2006). For continental crust to exceed down to depths of the mantle a hypothesis that UHP terranes dominantly forms in conjunction with ocean closure has been established (Hacker et al., 2013).

The main mechanism behind the formation of UHPM terranes is deep subduction of continental crust during plate collision. Subduction zones create a kind of transportation route, due to their geometry. The front of the subducting plate with oceanic crust affinities converts into the eclogite with depth. As eclogites are denser than the upper part of the mantle, the gravity drags the whole attached continental plate down to mantle depths. At these depths the crust is cool enough to stop any melting process. This is followed by exhumation, the process where UHP rocks are brought back from mantle depths to the Earth’s surface. Exhumation is built upon density divergence between the mantle and the subducted continental crust (Gilotti, 2013). Even though the mafic eclogite, transformed from oceanic crust, are denser than the mantle derived garnet peridotites, the eclogite facies continental crust have positive buoyancy compared to upper mantle and pre-eclogite facies continental crust have positive buoyancy compared to oceanic crust (Hacker et al., 2013). The subducted continental crust will therefore be brought back, possibly together with mantle derived garnet peridotite bodies, due to the force of positive buoyancy (van Roermund, 2009a). The process of exhumation is highly influenced by size, rate of exhumation and amount of eclogite and garnet peridotite. The findings of coesite and diamond have pushed the eclogite facies to even higher pressures and can now be reffered to as UHPM. Early as 30 years ago the high pressure polymorph coesite was discovered as inclusions in the continental crustal rocks of two different localities: 1) in garnet by Christian Chopin (1984) in Dora-Maira in Italy, and 2) in clinopyroxene by David Smith (1984) in Western Gneiss Region, Norway (Gilotti, 2013). Amongst microstructures developed by partial or complete conversion during exhumation process the most significant one results from pseudomorphic conversions. The pseudomorphic conversion between coesite and its breakdown product quartz provides distinct characteristic features that are easy to distinguish. The breakdown quartz commonly grows in the form of a corona around the coesite inclusion. And the host of relict coesite commonly garnet, clinopyroxene or zircon display radial fractures around the inclusion, which is caused by expansion due to the change in volume when coesite transform back to quartz (Schertl & O’Brien, 2013). This thesis will provide the pressure and temperature conditions of a gneiss sampled from the island of Otrøy in Norway. The study is executed with petrological and chemical analysis of present mineral assemblages followed by geothermobarometric calculations. This study may contribute to the understanding of the complex evolution of Western Gneiss Region and the Scandinavian Caledonides and the results may provide further information about the subduction of Baltica during the Scandian collison.

2 Geological Background

When two continental plates collide as a result of ocean closure it is referred to as a continental collisional orogeny (Sacks & Secor, Jr, 1990). This process results shortening of continental crust and commonly in subduction of continental crust, followed by lateral emplacement of allochtons from the hinterland upon the foreland continental margins (Gee et al., 2010). The kinematics of a continental collisional orogenic event propose that the downgoing plate, in early stage, is subjected to extension and high temperature metamorphism and in later stage suffer thrusting and cooling. The latter is referred to as the uplift process and the crust experience decompression and starts cooling. This results in retrograde metamorphic changes in exhumed rocks. High temperature and moderate to high pressure metamorphism at an early stage are commonly expected in this kind of subduction zones, where two plates collide (Sacks & Secor, Jr, 1990).

Figure 1. Tectonostratigraphic map and cross-section of the Scandinavian Caledonides (modified from Gee et al., 2010).

The Scandinavian Caledonides (figure 1) is the product of the closure of the Iapetus ocean with offset in early Ordovician that further in mid Silurian resulted in a continental collision, between the Laurentia and Baltica continents (Hurich, 1996;Gee et al., 2008 ;Corfu et al., 2014). The structure of the Caledonidian orogenic belt is highly comparable with the Himalayan orogenic belt, with folding and thrusting in the eastern foreland and locally emplaced nappes with more long transported allochtons placed upon. The Caledonides extend through the Scandiavian countries Norway, Sweden, Finland, Greenland and Svalbard. The continent- continent collision lead to descending of the Baltica plate underneath the Laurentian plate in mid to late Silurian, that further on resulted in partial subduction of Baltica margin under Laurentia. This was followed by high metamorphism of the hinterland that in early Devonian experienced exhumation (Gee et al., 2008). The coast of Norway represents the hinterland of the orogeny, and comprises Baltica basement together with emplaced nappes (Gee et al., 2010). UHP rocks of early Devonian age are present there and they are represented by coesite and microdiamond bearing eclogites and gneisses (figure 2) (Gee et al., 2008). Representing the deep subducted western margin of Baltica and roughly covering an era of >5000 km2 (Gilotti, 2013), the (WGR) constitute one of the planets largest and most exposed high pressure terranes, therefore studied recurrently in detail (Kylander-Clark et al., 2008). WGR displays a large scale window of the basement, the Western Gneiss Complex (WGC). The WGC is composed of crystalline basement and it is overlain by continental and oceanic Caledonian allochtons (Hacker et al., 2010) with an increasing metamorphic grade traced from Southeast to Northwest (Cuthbert et al., 2000;van Roermund, 2009b; Kylander-Clark et al., 2008). Pressures of c.40 kbar were reached in the core of the region, generating regional coesite production. Strong deformation and recrystallization in amphibolite facies can be recorded in both the eclogites and gneisses (Root et al., 2005).

Figure 2. Map of the Western Gneiss Region presenting the distribution of HP and UHP related discoveries (after Brueckner et al., 2010).

The Proterozoic basement gneisses on Otrøy incorporate lenses of eclogites that preserved eclogite facies mineral assemblages to various extent (Carswell et al., 2006). The occurrence of garnet peridotite bodies (Carswell et al., 2006 ; Brueckner et al., 2002; van Roermund, 2009a); van Roermund & Drury, 1998) incorporated within the host gneisses (figure 3) that experience amphibolite to high pressure granulite facies together with the recognition of eclogites containing relicts of coesite and/or poly crystalline quartz micro-inclusions on adjacent islands, Hareidlandet and Sørøyeane c. 40 km southwest of Otrøy and on Fjørtoft closer to the east of Otrøy (Carswell et al., 2006), makes the island Otrøy an interesting field for investigations of UHP metamorphism (van Roermund, 2009b). The peridotite bodies in the crustal rocks were probably emplaced during the collisional orogeny (Brueckner et al., 2002). On the northern side of Otrøy the basement gneisses with Batica heritage along with peridotite bodies and lenses of external orthopyroxene eclogite reflect Scandian UHPM (Carswell et al., 2006). Discovery of exsolved pyroxene in garnet peridotites provide strong evidence that the continental subduction exceeded down to depths of 180-200 km, implying that the northern UHP area is one of the most deeply subducted part of the WGC (van Roermund, 2009b).

Figure 3. Geological map of the western part of Otrøy showing the sample point of the Otrøy omphacite-garnet gneiss (modified from van Roermund, 2009b).

3 Methods

3.1 Light Microscope

Two thin sections from the gneiss sample were prepared to be studied in the polarizing light microscope. The study was done using basic procedures to define a general description of the mineral assemblages present. Further microstructures and other significant features were described. Representative and descriptive photos of abundant minerals and textures were taken.

3.2 Electron Microprobe Analysis

Electron microprobe analysis (EMPA) using a Jeol JXA8530F Hyperprobe was used to determine the chemical composition of the minerals present in the studied sample. Using a 10 nA beam current with 15 kV accelerating voltage and counting times of 10 s on peaks and 5 s on ±background positions, with the calibration using following mineral standards: Si, Ca - wollastonite, Na - albite, K - orthoclase, Mn, Ti – pyrophanite (MnTiO3), Fe – fayalite, and pure element oxides: Al2O3, MgO, Cr2O3. All elements were analysed by Kα spectral lines. Analysis was focused on minerals pre-selected in the light microscope. Chemical profiles over three diffrent garnets named A, B and C were done. Chemical composition of omphacite, phengite and plagioclase was also obtained. Data extracted from EMPA was corrected using the PAP routine, to use properly in further calculations of pressure and temperature. Back-scattered electrons (BSE) images were taken of all analytical points in both thin sections.

3.3 Geothermobarometry

This method was used to calculate the metamorphic temperature and pressure condition at which the Otrøy gneiss was formed. This method is based upon chemical equilibrium of minerals, were the state of equilibrium is determined by resolving the equilibrium phase of two reactions amongst the assemblage. Pressure and temperature derives from were the two reactions intersect in a pressure and temperature diagram, that corresponds to the pressure and temperature conditions in which they were equilibrated (Bucher & Grapes, 2011). The geothermobarometric calclutaions of the Otrøy gneiss were done using the assemblage garnet + clinopyroxene + phengite. Calculations are based on 1) the Fe-Mg exchange thermometer between garnet–clinopyroxene Ravna (2000) and 2) the barometer based on the net-transfer reaction 6 diopside + 3 muscovite = 3 caledonite + 2 grossular + pyrope calibrated by Ravna & Terry (2004). The calibration is based on the thermodynamic database by Holland & Powell (1998). Analysis extracted from the EMPA to use in the thermobarometric calculations were chosen based on phengite with maximum silicon (Si) content, omphacite with maximum jadeite (XJd) content and garnet with maximum grossular (XGrs) content.

4 Results

4.1 Light Microscopy

General mineral composition and the most abundant minerals of the Otrøy gneiss is represented by garnet, clinopyroxene (omphacite), amphibole, biotite, feldspars and quartz (figure 4a and 4b). The matrix surrounding the garnet crystals is constituted by various amounts of omphacite, feldspars, biotite, amphibole and quartz. See also appendix 1.

Figure 4a. Plane polarised image of the Figure 4b. Crossed polarised image of the mineral composition showing pink garnet, mineral composition showing isotropic light green pyroxene, dark green amphibole, garnet, anisotropic blue pyroxene, brown biotite, colourless quartz and anisotropic green amphibole, biotite, grey feldspars. quartz and feldspars.

Omphacite commonly occurs in a retrogressed form with intergrowth of plagioclase and quartz (figure 5a and 5b). It is also found with quartz inclusions (figure 6a and 6b) that to minor extent displays radial cracks (figure 7a and 7b). See also (figure 23-25) appendix 1.

Figure 5a. Plane polarised image of matrix Figure 5b. Crossed polarised image of with amphibole, quartz, feldspars, biotite and matrix. Vivid blue retrogressed pyroxene a big clast of retrogressed pyroxene intergrown with dark green amphibole. intergrowth with amphibole together with pink Isotropic garnets, anisotropic brown garnets. biotiote and grey quartz and feldspars. 8

Figure 6a. Plane polarised image showing Figure 6b. Crossed polarised image of pyroxene (omphacite) with quartz inclusions anisotropic vivid coloured omphacite with with visual radial cracks. quartz inclusions and visual radial cracks.

Figure 7a. Plane polarised image showing Figure 7b. Crossed polarised image of pyroxene (omphacite) with quartz inclusions anisotropic vivid coloured omphacite with with visual radial cracks. quartz inclusions and visual radial cracks.

Amphiboles occur as both eudral (figure 8a and 8b) and anhedral crystals, commonly intergrown with omphacite (figure 5a and 5b).

Figure 8a. Plane polarised image of an Figure 8b. Crossed polarised image of an ehudral retrogressed amphibole. ehudral retrogressed amphibole.

Garnet is found in both ehudral (figure 9a and 9b) and anhedral crystal forms. See also (figure 26a and 26b) appendix 1. Anhedral garnets are the most common. Relatively high amount of inclusions is identified in both crystal forms. Less common are visual microstextures such as radial cracks around inclusions, here interpreted to be developed around plagioclase (figure 10a and 10b) see also (figure 27a and 27b) appendix 1. Several polyphase inclusions were found, with two or more mineral phases within the same inclusion. For example (figure 11a and 11b) there are interpreted to be phengite adjacent to pyroxene. Garnet with pyroxene inclusion (figure 12a and 12b) has also been identified. Quartz inclusions are also found in garnet (figure 28a and 28b) appendix 1.

Figure 9a. Plane polarised image of an Figure 9b. Crossed polarised image of ehudral-subhedral garnet crystal. isotropic black ehudral-subhedral garnet crystal.

Figure 10a. Plane polarised image of a Figure 10b. Crossed polarised image of a plagioclase inclusion in garnet showing some plagioclase inclusion in anisotropic garnet radial cracks around the inclusion. showing some radial cracks around the inclusion.

Figure 11a. Plane polarised image of a two Figure 11b. Crossed polarised image of a phase inclusion interpreted to be phengite two phase inclusion, phengite light yellow and pyroxene in garnet. and pyroxene light greenish in garnet.

Figure 12a. Plane polarised image of a Figure 12b. Crossed polarised image of a pyroxene inclusion in garnet. pyroxene inclusion vivid blue in garnet.

4.2 Electron Microprobe Analysis

Based on microchemical analyses it was confirmed that the matrix minerals are represented by plagioclase, quartz, titanite, k-feldspar, biotite, amphibole and omphacite (figure 13a) surrounding the garnets (figure 13b). Other present minerals found in a smaller amount are rutile, ilmenite and zircon. Rutile and zircon occur as inclusions in the matrix located titanite (figure 13b).

Figure 13a. BSE image of matrix with Figure 13b. BSE image of garnet and omphacite, plagioclase, quartz, biotite, titanite other matrix phases. Note zircon and rutile and K-feldspar. inclusions in titanite.

Plagioclase inclusions in garnet are frequently found. Less common inclusions present in garnet are represented by ilmenite, apatite, titanite, zircon and rutile. Additionally polyphase inclusions composed of K-feldspar, plagioclase, biotite and/or pure albite occur in garnets (figure 14a and 14b). Such inclusions suggest presence of melt during garnet crystallization.

Figure 14a. BSE image showing multiphase Figure 14b. BSE image of garnet with a inclusions in garnet containing albite, multiphase inclusion containing biotite, plagioclase, biotite and K-feldspar. plagioclase and K-feldspar.

Phengite is rare and occurs as tiny, partially retrogressed inclusions in garnet (figure 15). Its Si content is estimated to 3.2 apfu.

Figure 15. BSE image of a composite phengite-biotite inclusion in garnet.

Matrix omphacite has a jadeite content that ranges from XJd= 6.5 – 21.4 and is repeatedly present in retrogressed form, broken down to a more stable diopside intergrown with plagioclase in form of symplectite. Here also hosting a small crystal of garnet (figure 16a). Exsolution are also found within matrix omphacite (figure 16b). However the lamella were too small to analyse. Both matrix and symplectitic plagioclase were analysed. Matrix located plagioclase varies in the chemical composition, i.e. XCa= 0-20, XNa= 38-75 and XK = 3-60 and the symplectetic plagioclase shows following ranges: XCa =19-22, XNa= 75- 77 and XK=2-4.

Figure 16a. BSE image of retrogressed Figure 16b. BSE image of unknown omphacite forming a symplectite with exsolution lamella (needle-like) in plagioclase. omphacite.

Garnet A has a general composition of Alm43-54Sps0,6-2Pyr11-20Grs22-34 the compositional profile (figure 17a and 17b) over garnet A shows a relative consistent composition of almandine (XAlm), spessartine (XSps), pyrope (XPyr) and grossular (XGrs) within the core while changes in chemistry are visible towards the rims. Largest changes in chemistry are noticed in case of grossular, almandine and XFe content. Spessertine and pyrope show a more consistent profile.

0,8 Garnet A 0,7 0,6 0,5 0,4 0,3 0,2

0,1 ChemicalComposition [%] 0 0 20 40 60 80 100 Analytical Points

XAlm XSps XPyr XGrs XFe

Figure 17a. Profile showing chemical composition of garnet A constructed based on the analytical points presented in (table 6) appendix 2.

Figure 17b. Profile over garnet A. The red arrow shows the trajectory of the profile.

Garnet B has a general chemical composition of Alm42-49Sps0,6-2Pyr15- 23Grs27-35. The profile over garnet B (figure 18a) shows a disruption illustrated by the gap between the analytical points 55 and 58. This gap is in fact a whole in the studied thin section, which also is visible in (figure 18b). A slight change in chemistry of this garnet is visible in both the rim and core, where the highest deviation is shown in grossular, almandine and XFe content. While pyrope and spessartine stays rather homogenous from core to rim.

0,8 Garnet B 0,7 0,6 0,5 0,4 0,3 0,2

0,1 ChemicalComposition [%] 0 0 20 40 60 80 100 Analytical Points XAlm XSpes XPyr XGrs XFe

Figure 18a. Profile showing chemical composition over Garnet B based on the analytical points presented in (table 7) appendix 2.

Figure 18b. Profile over garnet B. The red indicates a trajectory of the profile.

Garnet C has a general chemical composition of Alm42-49Sps0.6-2Pyr17- 20Grs29-36. The profile over garnet C (figure 19a and 19b) shows a relative homogenous composition. Tiny changes are visible towards the rims. The highest deviation is shown in grossular, almandine and XFe content. While spessartine and pyrope are more consistent from core to rim.

Garnet C 0,8 0,7 0,6 0,5 0,4 0,3 0,2 0,1

0 ChemicalComposition [%] 0 20 40 60 80 100 120 Analytical Points

XAlm XSps XPyr XGrs XFe

Figure 19a. Profile showing chemical composition over garnet C based on analytical points presented in (table 8) appendix 2.

Figure 19b. Profile over garnet C. The red arrow shows the trajectory of the profile.

4.3 Geothermobarometry

The geothermobareometric calculation established peak temperature to 886˚C ± 65 ˚C and peak pressure to 2.23 ± 0.32 GPa for the studied Otrøy gneiss. The peak conditions of the Otrøy gneiss were calculated for the assemblage garnet + clinopyroxene + phengite. The peak temperature and pressure can be read from the diagram below (figure 20) where the line of the thermometer and the line of the barometer intersect. Analytical points selected for calculations are marked in (table 2, 3 and 8) appendix 2.

Figure 20. Peak pressure and temperature conditions calculated for the Otrøy gneiss, based on the geothermobarometric method of (Ravna & Terry, 2004).

5 Discussion

The results of this study show reliable evidence that the Otrøy underwent progressive metamorphism during the deep burial of the continental crust, followed by retrograde metamorphism during exhumation. This studied gneiss is a host rock for UHP garnet peridotites and eclogites described by Carswell et.al (2006). Therefore it was assumed that it would bear evidence for UHPM. The observations of microinclusions of SiO2 sourrunded by radial cracks in omphacite and garnet are typical sign of pseudomorphic transition after coesite and indicate that coesite might have been present at the peak metamorphic conditions. This observation together with the presence of typical high pressure phases like phengite and omphacite suggests formation of the Otrøy gneiss during deep burial. The microchemical analysis of garnet and pyroxene supports the above mentioned assumptions. The chemistry of garnet and omphacite reflect reasonable high contents of grossular and jadeite, respectively. The geotermobarometry based on garnet + pyroxene + phengite yielded pressure- temperature conditions at c. 880 ˚C and 2.2 GPa. However, such conditions are defined as high pressure, but not ultrahigh pressure. During the stage of prograde metamorphism the garnet grains are in an advantageous environment to grow and therefore integrate inclusions of other minerals. The presence of plagioclase, pyroxene, phengite, biotite, rutile and zircon as inclusions in garnet can be interpreted to be fragments of both lower grade as for the plagioclase and higher grade metamorphic facies as for rutile and phengite. The most significant is the presence of phengite that is highly indicative for high pressure conditions. Silicon content in phengite can be easily translated to the pressure conditions under which it has been formed. High Si content in phengite e.g. above 3.2 apfu is already indicative for quite high pressures. The microchemical analysis of phengite in the studied gneiss is not much higher than 3.2 apfu. It may mean that the pressure calculated using such phengite is most probably not the maximum pressure for the studied gneiss. It is more likely the minimum pressure. The presence of K-feldspar in multiphase inclusions in garnet can be indicative for the partial melting process due to phengite dehydration under high temperature. The first phase that crystallises from the partial melt is usually K-feldspar, rich in potassium without any presence of water. K- feldspar can be stable at high pressures, as described by Schertl and O’Brien (2013). The retrograde metamorphic stage related to exhumation and pressure release is proven by the discovery of exsolutions in omphacite. Exsolutions can be an indicator for slow exhumation and therefore a slow cooling rate necessary to develop exsolution lamella. The size of the lamella is dependent on both cooling rate and the original crystal composition. One thing to notice here is that the lamella were too small to analyse. This could mean that the cooling rate were somewhere intermediate to rapid, or that there were some other process involved that prevent the development of proper lamella. The retrograde stage is further and more strongly indicated by the frequent occurrence of retrogressed omphacite, with a high amount of intergrown symplectitic plagioclase. The analysis of symplectetic plagioclase shows a slightly increased sodium content Na75-77, compared to the matrix located plagioclase with Na38-75. This proves that omphacite is partially broken down to a more stable diopside with intergrowth of sodium rich plagioclase that forms symplectites.

The chemical profiles over garnet A, B and C show that the garnets are relatively homogenous in their composition with minor changes in chemistry towards the rims. They show a mutual pattern with an increase from core to rim of the almandine (Fe) content and the grossular (Ca) and pyrope (Mg) contents decrease from core to rim in profiles B and C. Profile A also shows a decrease in grossular, but opposite trend for pyrope, which increases from core to rim. While spessartine (Mn) remains more or less homogenous throughout all the profiles. This minor divergence in composition is typical for retrograde zoning. It is known that diffusion in garnets that exceeds temperatures of 600 ˚C in the prograde stage most likely will reduce any existing chemical profile with a growth zoning pattern and therefore the garnets will be homogenised. This means that any large divergence in composition will be more or less erased in the garnets and it is also referred to as diffusional retrograde zoning. Such zoning is roughly characterized by an increase in spessartine (Mn), decrease in pyrope (Mg) and a relatively homogenous grossular (Ca) profile. This description is in accord to garnet B and C. Any deviation from this, as for garnet A with increase in pyrope and decrease in grossular, can be interpreted as remnants of growth zoning. These homogenised garnets imply a rapid cooling rate and thereby strengthen the idea of a relatively rapid exhumation. The Otrøy gneiss was assumed to be a UHP rock, but microchemical analyses and geotermobarometry show HP conditions. As previously mentioned, there is a lot of retrograde features in the studied sample. This is also the case for phengite. The geobarometer used is highly dependent on phengite, so the pressure estimation derived here might not be perfect. This, in turn, means that the real peak pressure for the Otrøy gneiss could have been much higher. This strong retrogression was caused due to the very high temperature. Therefore the evidence for UHPM is generally erased, but some indicators are still preserved (e.g. rare phengite and possible remnants of former coesite in omphacite and garnet).

6 Acknowledgements

My gratitude goes to my supervisor Ph.D. and Docent Researcher Jaroslaw Majka, for trusting me with this project and for the time he set aside to help me move forward with all stages of this project. And most of all for encouraging me and for always keeping his office door and mailbox open for questions and guidance. I also would like to thank Ph.D. student Iwona Klonowska for all the help during EMPA and for the assistance with the calculations. And for always taking the time to answer my questions.

7 References

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Ravna, E. K & Terry, M. P (2004). Geothermobarometry of UHP and HP eclogites and schists-an evaluation of equilibria among garnet-clinopyroxene-kyanite- phengite-coesite/quartz. Journal of Metamorphic Geology, 22, pp. 579–592. Van Roermund, H. L. M & Drury, M. R (1998). Ultra-high pressure (P>6 GPa) garnet peridotites in western Norway; exhumation of mantle rocks from >185 km depth. Terra Nova, 10(6), pp. 295–301. Van Roermund, H (2009a). Mantle-wedge garnet peridotites from the northernmost ultra-high pressure domain of the Western Gneiss region, SW Norway. In: (Schertl, H.-P, Gilotti, J. A, Cuthbert, S. J, & Perchuk, A, Eds) Twenty-five years of ultrahigh-pressure metamorphism, 21(6), pp. 1085–1096. Van Roermund, H (2009b). Recent progress in Scandian ultrahigh-pressure metamorphism in the northernmost domain of the Western Gneiss Complex, SW Norway; continental subduction down to 180-200 km depth. Journal of the Geological Society, London, 166, pp. 739–751. Root, D. B, Hacker, B. R, Gans, P. B, Ducea, M. N, Eide, E. A & Mosenfelder, J. L (2005). Discrete ultrahigh-pressure domains in the Western Gneiss region, Norway; implications for formation and exhumation. Journal of Metamorphic Geology, 23(1), pp. 45–61. Sacks, P. E & Secor, Jr, D. T (1990). Delamination in collisional orogens. Geology [online]. Available from: http://geology.gsapubs.org/. [Accessed 2015-04-15]. Schertl, H.-P & O’Brien, P. J (2013). Continental Crust at Mantle Depths: Key Minerals and Microstructures. Elements, 9(4), pp. 261–266. Spengler, D, Van Roermund, H. L. M, Drury, M. R, Ottolini, L, Mason, P. R. D & Davies, G. R (2006). Deep origin and hot melting of an Archaean orogenic peridotite massif in Norway. Nature, 440(7086), pp. 913–917.

8 Appendix

Appendix 1

Figure 21a. Plane polarised image of the Figure 21b. Crossed polarised image of mineral composition showing pink garnet, the mineral composition showing isotropic light green pyroxene, dark green amphibole, garnet, anisotropic blue pyroxene, brown biotite, colourless quartz and anisotropic green amphibole, biotite, grey feldspars. quartz and feldspars.

Figure 22a. Plane polarised image of the Figure 22b. Crossed polarised image of mineral composition showing pink garnet, the mineral composition showing isotropic light green pyroxene, brown biotite, garnet, anisotropic blue pyroxene, biotite, colourless quartz and feldspars. grey quartz and feldspars.

Figure 23a. Plane polarised image of matrix Figure 23b. Crossed polarised image of with colourless quartz and feldspars together matrix with grey quartz and feldspars with biotite and retrogressed pyroxene. together with biotite and retrogressed pyroxene.

Figure 24a. Plane polarised image of a Figure 24b. Crossed polarised image of a retrogressed pyroxene clast surrounded by retrogressed pyroxene clast surrounded colourless feldspars and quartz. by grey feldspars and quartz.

Figure 25a. Plane polarised image showing Figure 25b. Crossed polarised image of pyroxene (omphacite) with quartz inclusions anisotropic vivid coloured omphacite with with visual radial cracks. quartz inclusions and visual radial cracks.

Figure 26a. Plane polarised image of an Figure 25b. Plane polarised image of an ehudral-subhedral garnet crystal. ehudral garnet crystal.

Figure 27a. Plane polarised image of two Figure 27b. Crossed polarised image of unknown inclusions in garnet showing radial two unknown inclusions in garnet. cracks around the inclusions

Figure 28a. Plane polarised image of a Figure 28b. Crossed polarised image of a quartz inclusion in garnet. quartz inclusion in garnet.

Appendix 2

Table 1. Chemical analysis of clinopyroxene (omphacite).

Analyse omph1 omph2 omph3 omph9 omph10 omph11 omph12 point

SiO2 51.390 51.210 50.670 50.030 49.790 49.940 50.010

TiO2 0.217 0.362 0.338 0.273 0.306 0.442 0.197 Al2O3 7.170 6.420 6.200 5.030 5.790 5.020 4.840

Cr2O3 0.000 0.009 0.047 0.000 0.000 0.030 0.000 FeO 8.770 9.270 9.940 10.450 10.720 11.250 10.360 MnO 0.092 0.058 0.022 0.194 0.000 0.081 0.140 MgO 9.920 10.450 10.710 11.220 10.930 11.190 11.460 CaO 18.880 19.800 19.890 21.150 21.270 20.950 21.320

Na2O 2.840 2.040 1.610 0.852 1.069 0.800 0.985

K2O 0.000 0.011 0.000 0.155 0.079 0.145 0.099 Total 99.369 99.794 99.595 99.493 100.074 100.098 99.582

Si 1.916 1.910 1.900 1.893 1.874 1.885 1.892 Ti 0.006 0.010 0.010 0.008 0.009 0.013 0.006 Al 0.315 0.282 0.274 0.224 0.257 0.223 0.216 Cr 0.000 0.000 0.001 0.000 0.000 0.001 0.000 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 0.273 0.289 0.312 0.331 0.337 0.355 0.328 Mn 0.003 0.002 0.001 0.006 0.000 0.003 0.004 Mg 0.551 0.581 0.599 0.633 0.613 0.630 0.646 Ca 0.754 0.791 0.799 0.857 0.858 0.847 0.864 Na 0.205 0.147 0.117 0.063 0.078 0.059 0.072 K 0.000 0.001 0.000 0.007 0.004 0.007 0.005 Total 4.023 4.013 4.012 4.022 4.030 4.023 4.033

XJd 0.214 0.157 0.128 0.068 0.083 0.065 0.077

XNa 0.214 0.157 0.128 0.068 0.083 0.065 0.077

XMg 0.668 0.668 0.658 0.657 0.645 0.639 0.664

Structural formula calculated based on 6 oxygens. .

Table 2. Chemical analysis of clinopyroxene (omphacite).

Analyse omph13 omph14 omph15 omph16 omph17# omph18 omph19 omph20 point

SiO2 49.310 50.690 51.320 50.310 51.130 50.630 50.960 51.360

TiO2 0.318 0.357 0.341 0.326 0.277 0.332 0.323 0.413 Al2O3 6.850 6.630 3.880 6.650 7.600 5.200 7.840 6.640

Cr2O3 0.000 0.002 0.028 0.047 0.038 0.019 0.068 0.000 FeO 11.120 9.990 9.890 9.310 9.230 9.430 9.190 8.840 MnO 0.089 0.136 0.112 0.120 0.118 0.063 0.088 0.109 MgO 10.290 9.630 11.560 10.660 9.710 10.890 10.020 10.450 CaO 20.190 19.740 21.830 20.410 18.710 21.110 19.160 20.320

Na2O 1.118 1.890 0.958 1.610 2.580 1.370 2.360 2.030

K2O 0.170 0.005 0.002 0.001 0.000 0.010 0.004 0.000 Total 99.558 99.180 100.051 99.624 99.538 99.114 100.148 100.252

Si 1.864 1.907 1.925 1.885 1.905 1.909 1.889 1.904 Ti 0.009 0.010 0.010 0.009 0.008 0.009 0.009 0.012 Al 0.305 0.294 0.172 0.294 0.334 0.231 0.343 0.290 Cr 0.000 0.000 0.001 0.001 0.001 0.001 0.002 0.000 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 0.351 0.314 0.310 0.292 0.288 0.297 0.285 0.274 Mn 0.003 0.004 0.004 0.004 0.004 0.002 0.003 0.003 Mg 0.580 0.540 0.646 0.595 0.539 0.612 0.554 0.577 Ca 0.818 0.796 0.877 0.819 0.747 0.853 0.761 0.807

Na 0.082 0.138 0.070 0.117 0.186 0.100 0.170 0.146 K 0.008 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Total 4.020 4.004 4.014 4.017 4.013 4.016 4.015 4.013

XJd 0.091 0.148 0.074 0.125 0.200 0.105 0.182 0.153

XNa 0.091 0.148 0.074 0.125 0.200 0.105 0.182 0.153

XMg 0.623 0.632 0.676 0.671 0.652 0.673 0.660 0.678

Structural formula calculated based on 6 oxygens. # Analyse point used in geothermobarometric calculation.

Table 3. Chemical analysis of phengite.

Analyse point pheng1 pheng2 pheng3# pheng4

SiO2 48.130 47.630 49.070 48.720 TiO2 1.211 1.232 1.061 1.002

Al2O3 30.760 31.180 31.810 31.940 FeO 2.950 2.430 2.160 1.900 MnO 0.009 0.000 0.033 0.099 MgO 3.000 2.540 2.450 2.210 CaO 0.156 0.140 0.133 0.123

Na2O 0.102 0.144 0.145 0.142

K2O 10.380 10.740 10.660 10.660

H2O 0.000 0.000 0.000 0.000 Total 96.698 96.036 97.521 96.796

Si 3.184 3.172 3.203 3.200 Ti 0.060 0.062 0.052 0.050 Al 2.398 2.447 2.447 2.473 Fe2+ 0.163 0.135 0.118 0.104 Mn 0.001 0.000 0.002 0.006 Mg 0.296 0.252 0.238 0.216 Ca 0.011 0.010 0.009 0.009 Na 0.013 0.019 0.018 0.018 K 0.876 0.912 0.888 0.893 H 2.000 2.000 2.000 2.000 Total 9.002 9.009 8.975 8.969

Structural formula calculated based on 11 oxygens. #Analyse point used in geothermobarometric calculation.

Table 4. Chemical analysis of matrix located plagioclase.

Analyse point plg1 plg2 plg5 plg6 plg9 plg10

SiO2 63.940 63.650 62.950 62.640 62.200 62.990

TiO2 0.009 0.035 0.039 0.053 0.000 0.000 Al2O3 21.670 21.910 22.030 22.040 22.560 21.940

Cr2O3 0.000 0.000 0.000 0.000 0.000 0.000

Fe2O3 0.000 0.000 0.000 0.000 0.000 0.000 FeO 0.051 0.106 0.119 0.067 0.067 0.155 MnO 0.000 0.003 0.045 0.000 0.092 0.000 MgO 0.002 0.000 0.000 0.011 0.000 0.047 CaO 3.420 3.700 3.890 3.860 4.490 3.970

Na2O 8.660 9.010 9.080 8.900 8.570 9.150

K2O 0.870 0.723 0.690 0.637 0.560 0.583 Total 98.623 99.136 98.844 98.207 98.539 98.835

Si 2.860 0.116 2.822 2.822 2.797 2.824 Ti 0.000 2.783 0.001 0.002 0.000 0.000 Al 1.142 0.002 1.164 1.170 1.196 1.159 Cr 0.000 1.007 0.000 0.000 0.000 0.000 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 0.002 0.000 0.004 0.003 0.003 0.006 Mn 0.000 0.005 0.002 0.000 0.003 0.000 Mg 0.000 0.000 0.000 0.001 0.000 0.003 Ca 0.164 0.000 0.187 0.186 0.216 0.191 Na 0.751 0.417 0.789 0.777 0.747 0.795 K 0.050 0.668 0.039 0.037 0.032 0.033 Total 4.969 4.999 5.009 4.998 4.995 5.011

XCa 0.170 0.000 0.184 0.186 0.217 0.187

XNa 0.779 0.384 0.777 0.777 0.750 0.780

XK 0.051 0.616 0.039 0.037 0.032 0.033

Structural formula calculated based on 8 oxygens.

Table 5. Chemical analysis of symplectetic plagioclase.

Analyse point plg3 plg4 plg7 plg8

SiO2 62.830 62.360 63.160 62.510

TiO2 0.000 0.000 0.000 0.013 Al2O3 22.600 23.010 22.080 22.590

Cr2O3 0.000 0.000 0.000 0.000

Fe2O3 0.000 0.000 0.000 0.000 FeO 0.201 0.161 0.138 0.136 MnO 0.024 0.022 0.000 0.018 MgO 0.000 0.000 0.000 0.000 CaO 4.420 4.680 3.900 4.460

Na2O 8.560 8.730 8.770 8.690

K2O 0.592 0.403 0.639 0.540 Total 99.227 99.366 98.687 98.957

Si 2.805 2.783 2.830 2.799 Ti 0.000 0.000 0.000 0.000 Al 1.189 1.210 1.166 1.192 Cr 0.000 0.000 0.000 0.000 Fe3+ 0.000 0.000 0.000 0.000 Fe2+ 0.008 0.006 0.005 0.005 Mn 0.001 0.001 0.000 0.001 Mg 0.000 0.000 0.000 0.000 Ca 0.211 0.224 0.187 0.214 Na 0.741 0.755 0.762 0.754 K 0.034 0.023 0.037 0.031 Total 4.988 5.001 4.986 4.997

XCa 0.214 0.223 0.190 0.214

XNa 0.751 0.754 0.773 0.755

XK 0.034 0.023 0.037 0.031

Structural formula calculated using 8 oxygens.

Table 5. Chemical analysis of garnet A.

Analytical Point 29 30 31 32 33 34 35 36 37 38 39 40

SiO2 37.720 38.100 38.300 38.190 38.140 38.240 37.710 38.040 38.020 37.990 37.990 38.100

TiO2 0.064 0.017 0.082 0.132 0.086 0.057 0.086 0.107 0.078 0.029 0.046 0.000

Al2O3 21.610 21.790 21.820 21.880 21.840 22.340 22.040 21.970 22.160 22.020 21.860 22.060 CrO3 0.042 0.027 0.000 0.029 0.043 0.049 0.052 0.027 0.009 0.000 0.029 0.016

Fe2O3 0.549 0.150 0.221 0.190 0.004 0.105 0.705 0.273 0.085 0.424 0.255 0.269 FeO 25.716 23.675 22.691 22.479 21.946 22.475 22.576 22.395 22.334 22.408 22.100 22.208 MnO 0.929 0.859 0.676 0.588 0.423 0.550 0.457 0.444 0.496 0.443 0.345 0.510 MgO 4.820 4.620 4.690 4.760 4.840 4.980 4.900 4.850 4.830 4.980 4.920 4.860 NiO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 ZnO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 CaO 8.550 10.380 11.370 11.530 11.720 11.640 11.850 11.690 11.700 11.640 11.740 11.840 Total 100.000 99.617 99.851 99.778 99.042 100.436 100.375 99.795 99.711 99.935 99.286 99.863

Si 2.961 2.980 2.981 2.972 2.980 2.954 2.931 2.961 2.958 2.955 2.968 2.962 Ti 0.004 0.001 0.005 0.008 0.005 0.003 0.005 0.006 0.005 0.002 0.003 0.000 Al 2.000 2.009 2.002 2.007 2.012 2.034 2.019 2.015 2.032 2.019 2.013 2.021 Cr 0.003 0.002 0.000 0.002 0.003 0.003 0.003 0.002 0.001 0.000 0.002 0.001 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 1.721 1.557 1.490 1.474 1.435 1.458 1.509 1.474 1.458 1.482 1.459 1.460 Mn 0.062 0.057 0.045 0.039 0.028 0.036 0.030 0.029 0.033 0.029 0.023 0.034 Mg 0.564 0.539 0.544 0.552 0.564 0.573 0.568 0.563 0.560 0.577 0.573 0.563 Ni 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Zn 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.719 0.870 0.948 0.962 0.981 0.963 0.987 0.975 0.975 0.970 0.983 0.986 Total 8.034 8.014 8.014 8.016 8.007 8.025 8.052 8.025 8.021 8.034 8.022 8.027

XAlm 0.538 0.505 0.481 0.473 0.469 0.460 0.448 0.464 0.463 0.459 0.463 0.459

XSps 0.021 0.019 0.015 0.013 0.009 0.012 0.010 0.010 0.011 0.010 0.008 0.011

Xpyr 0.188 0.179 0.181 0.184 0.188 0.191 0.189 0.187 0.187 0.192 0.191 0.188

XGrs 0.222 0.285 0.309 0.314 0.326 0.316 0.306 0.316 0.322 0.311 0.319 0.320

XFe 0.753 0.743 0.732 0.727 0.718 0.718 0.727 0.724 0.722 0.720 0.718 0.722

Structural formula calculated based 12 oxygens. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

38.140 38.250 37.850 38.200 39.580 38.020 38.000 38.200 38.560 38.460 38.040 38.070 38.260 38.260 38.120 0.044 0.061 0.038 0.057 0.000 0.032 0.061 0.088 0.019 0.038 0.078 0.067 0.000 0.095 0.065 22.030 22.000 22.070 22.080 16.880 21.780 22.150 22.090 21.790 21.970 21.850 22.010 22.120 22.080 21.980 0.023 0.004 0.016 0.000 0.007 0.000 0.063 0.000 0.007 0.011 0.007 0.043 0.009 0.005 0.005 0.194 0.213 0.206 0.191 0.000 0.386 0.249 0.070 0.365 0.185 0.352 0.074 0.329 0.000 0.384 21.906 22.239 22.044 22.238 16.880 21.773 22.266 22.417 22.112 22.293 21.913 22.014 22.314 22.160 21.854 0.482 0.439 0.415 0.454 0.256 0.450 0.413 0.458 0.502 0.390 0.416 0.382 0.387 0.386 0.525 5.130 4.970 5.060 4.980 2.600 4.970 5.020 4.820 4.960 4.960 4.940 4.930 5.110 4.880 5.030 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.650 11.670 11.630 11.680 8.610 11.880 11.730 11.660 11.780 11.700 11.900 11.780 11.680 11.700 11.920 99.598 99.846 99.330 99.880 84.813 99.290 99.952 99.803 100.094 100.007 99.496 99.369 100.209 99.565 99.883

2.966 2.970 2.954 2.965 3.481 2.970 2.951 2.968 2.987 2.980 2.966 2.967 2.962 2.974 2.961 0.003 0.004 0.002 0.003 0.000 0.002 0.004 0.005 0.001 0.002 0.005 0.004 0.000 0.006 0.004 2.019 2.014 2.030 2.020 1.750 2.005 2.027 2.023 1.990 2.006 2.008 2.022 2.018 2.023 2.012 0.001 0.000 0.001 0.000 0.000 0.000 0.004 0.000 0.000 0.001 0.000 0.003 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.436 1.457 1.451 1.455 1.242 1.445 1.461 1.461 1.454 1.455 1.450 1.439 1.464 1.441 1.442 0.032 0.029 0.027 0.030 0.019 0.030 0.027 0.030 0.033 0.026 0.027 0.025 0.025 0.025 0.035 0.595 0.575 0.589 0.576 0.341 0.579 0.581 0.558 0.573 0.573 0.574 0.573 0.590 0.565 0.582 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.971 0.971 0.973 0.971 0.811 0.994 0.976 0.971 0.978 0.971 0.994 0.984 0.969 0.974 0.992 8.022 8.019 8.028 8.021 7.644 8.025 8.030 8.016 8.016 8.014 8.025 8.017 8.029 8.009 8.029

0.456 0.465 0.455 0.462 0.476 0.455 0.455 0.470 0.467 0.470 0.456 0.462 0.459 0.469 0.450 0.011 0.010 0.009 0.010 0.006 0.010 0.009 0.010 0.011 0.009 0.009 0.008 0.008 0.008 0.011 0.198 0.192 0.196 0.192 0.111 0.193 0.194 0.186 0.191 0.191 0.191 0.191 0.196 0.188 0.194 0.317 0.317 0.318 0.318 0.265 0.320 0.316 0.321 0.315 0.318 0.321 0.324 0.313 0.325 0.319 0.707 0.717 0.711 0.716 0.785 0.714 0.715 0.723 0.717 0.718 0.716 0.715 0.713 0.718 0.712 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

38.270 38.140 37.800 38.260 37.720 38.340 37.850 38.270 37.990 38.330 38.130 37.950 38.690 38.130 38.030 0.090 0.082 0.097 0.093 0.002 0.051 0.040 0.070 0.038 0.059 0.051 0.061 0.032 0.120 0.101 22.060 21.900 21.720 21.970 21.870 21.950 21.800 22.020 21.880 21.880 21.880 21.860 22.160 21.850 21.940 0.018 0.000 0.029 0.000 0.058 0.000 0.000 0.000 0.011 0.029 0.000 0.005 0.020 0.000 0.038 0.325 0.582 0.505 0.282 0.355 0.242 0.553 0.351 0.690 0.269 0.230 0.375 0.330 0.511 0.281 22.667 22.037 22.086 21.876 21.601 22.122 21.773 22.044 21.839 21.828 21.863 21.563 22.353 21.951 22.348 0.397 0.606 0.316 0.488 0.439 0.552 0.481 0.432 0.397 0.504 0.526 0.539 0.437 0.483 0.429 4.800 5.000 4.830 4.950 4.920 4.710 4.890 4.790 4.960 4.820 4.720 4.810 4.850 4.850 4.820 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.800 11.880 11.950 11.990 12.070 12.040 12.090 12.240 12.280 12.130 12.090 12.250 12.190 12.140 11.760 100.428 100.226 99.333 99.909 99.035 100.006 99.476 100.216 100.085 99.849 99.490 99.412 101.061 100.035 99.746

2.962 2.959 2.959 2.969 2.956 2.975 2.957 2.965 2.952 2.976 2.973 2.963 2.972 2.962 2.961 0.005 0.005 0.006 0.005 0.000 0.003 0.002 0.004 0.002 0.003 0.003 0.004 0.002 0.007 0.006 2.013 2.003 2.004 2.009 2.020 2.008 2.008 2.011 2.004 2.003 2.011 2.011 2.006 2.001 2.014 0.001 0.000 0.002 0.000 0.004 0.000 0.000 0.000 0.001 0.002 0.000 0.000 0.001 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.486 1.464 1.476 1.436 1.436 1.450 1.455 1.449 1.460 1.433 1.439 1.430 1.455 1.456 1.472 0.026 0.040 0.021 0.032 0.029 0.036 0.032 0.028 0.026 0.033 0.035 0.036 0.028 0.032 0.028 0.554 0.578 0.564 0.573 0.575 0.545 0.570 0.553 0.575 0.558 0.549 0.560 0.555 0.562 0.560 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.979 0.988 1.002 0.997 1.013 1.001 1.012 1.016 1.023 1.009 1.010 1.025 1.003 1.011 0.981 8.026 8.035 8.033 8.021 8.033 8.018 8.036 8.026 8.043 8.018 8.019 8.028 8.023 8.030 8.025

0.468 0.450 0.457 0.455 0.446 0.464 0.447 0.455 0.442 0.458 0.460 0.447 0.461 0.452 0.464 0.009 0.013 0.007 0.011 0.010 0.012 0.011 0.009 0.009 0.011 0.012 0.012 0.009 0.011 0.009 0.184 0.192 0.188 0.191 0.191 0.182 0.190 0.184 0.191 0.186 0.183 0.186 0.185 0.187 0.186 0.316 0.312 0.318 0.324 0.325 0.326 0.321 0.328 0.320 0.327 0.330 0.330 0.324 0.322 0.317 0.729 0.717 0.724 0.715 0.714 0.727 0.719 0.724 0.718 0.720 0.724 0.719 0.724 0.722 0.725 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

37.820 37.900 38.180 37.610 38.060 37.840 37.940 38.100 38.030 37.910 38.210 38.230 37.910 38.340 38.180 0.067 0.101 0.055 0.053 0.000 0.000 0.063 0.002 0.032 0.000 0.103 0.095 0.095 0.023 0.051 22.040 21.850 22.070 21.490 22.290 22.210 22.180 21.780 22.100 22.080 21.780 21.820 21.780 21.840 22.000 0.054 0.045 0.000 0.016 0.025 0.000 0.056 0.007 0.040 0.020 0.000 0.000 0.005 0.000 0.002 0.293 0.644 0.376 0.617 0.209 0.275 0.241 0.413 0.397 0.331 0.398 0.238 0.369 0.447 0.269 22.447 21.981 22.452 21.485 22.652 22.353 22.443 22.018 22.042 21.762 21.932 21.886 21.448 21.978 21.808 0.457 0.599 0.531 0.554 0.536 0.375 0.502 0.524 0.529 0.505 0.461 0.458 0.528 0.529 0.463 4.730 5.040 5.020 4.960 4.970 4.810 4.830 4.850 4.730 4.820 4.870 4.730 4.830 4.750 4.950 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.820 11.830 11.560 11.840 11.480 11.950 11.780 11.850 12.300 12.260 11.990 12.110 12.230 12.200 12.040 99.727 99.989 100.243 98.624 100.221 99.813 100.035 99.545 100.201 99.688 99.743 99.567 99.194 100.107 99.763

2.950 2.949 2.959 2.963 2.950 2.946 2.948 2.972 2.951 2.952 2.973 2.977 2.965 2.975 2.966 0.004 0.006 0.003 0.003 0.000 0.000 0.004 0.000 0.002 0.000 0.006 0.006 0.006 0.001 0.003 2.026 2.004 2.016 1.996 2.036 2.038 2.031 2.003 2.021 2.027 1.998 2.003 2.008 1.998 2.015 0.003 0.003 0.000 0.001 0.002 0.000 0.003 0.000 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.481 1.468 1.477 1.452 1.481 1.471 1.472 1.461 1.454 1.437 1.451 1.439 1.425 1.452 1.433 0.030 0.039 0.035 0.037 0.035 0.025 0.033 0.035 0.035 0.033 0.030 0.030 0.035 0.035 0.030 0.550 0.585 0.580 0.583 0.574 0.558 0.559 0.564 0.547 0.560 0.565 0.549 0.563 0.549 0.573 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.988 0.986 0.960 1.000 0.953 0.997 0.981 0.991 1.023 1.023 1.000 1.011 1.025 1.014 1.002 8.032 8.041 8.030 8.035 8.031 8.035 8.031 8.026 8.035 8.033 8.022 8.015 8.026 8.025 8.023

0.460 0.446 0.461 0.447 0.462 0.455 0.458 0.461 0.448 0.445 0.459 0.462 0.447 0.458 0.453 0.010 0.013 0.012 0.012 0.012 0.008 0.011 0.012 0.012 0.011 0.010 0.010 0.012 0.012 0.010 0.183 0.195 0.193 0.194 0.191 0.186 0.186 0.188 0.182 0.186 0.188 0.183 0.188 0.183 0.191 0.319 0.308 0.309 0.314 0.311 0.324 0.318 0.318 0.328 0.330 0.321 0.330 0.330 0.325 0.326 0.729 0.715 0.718 0.714 0.721 0.725 0.725 0.721 0.727 0.720 0.720 0.724 0.717 0.726 0.714 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

38.140 37.990 37.190 37.940 37.900 37.690 38.050 37.900 38.070 37.830 37.830 37.720 37.880 38.760 38.100 0.099 0.000 0.099 0.080 0.000 0.069 0.084 0.040 0.000 0.063 0.086 0.078 0.021 0.036 0.053 21.830 21.750 21.600 22.210 21.820 21.980 21.670 22.170 22.020 22.010 21.810 21.600 21.790 22.660 22.020 0.000 0.022 0.007 0.000 0.000 0.000 0.009 0.000 0.000 0.022 0.000 0.011 0.000 0.002 0.038 0.398 0.398 0.435 0.054 0.379 0.335 0.467 0.101 0.000 0.487 0.275 0.199 0.747 0.000 0.043 21.642 21.902 21.608 22.222 22.269 22.489 22.530 22.599 22.310 22.322 21.833 22.091 22.237 21.570 22.081 0.572 0.463 0.470 0.551 0.472 0.565 0.516 0.482 0.467 0.491 0.389 0.460 0.420 0.387 0.485 4.870 4.780 4.680 4.850 4.830 4.830 4.790 4.800 4.780 4.890 4.910 4.640 4.820 5.100 4.700 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.150 12.010 11.980 11.700 11.650 11.460 11.490 11.510 11.490 11.810 11.830 11.630 12.060 11.360 11.950 99.701 99.315 98.069 99.606 99.319 99.418 99.606 99.602 99.137 99.925 98.962 98.429 99.976 99.875 99.470

2.968 2.971 2.949 2.954 2.965 2.949 2.972 2.955 2.975 2.946 2.964 2.975 2.953 2.986 2.969 0.006 0.000 0.006 0.005 0.000 0.004 0.005 0.002 0.000 0.004 0.005 0.005 0.001 0.002 0.003 2.003 2.005 2.019 2.038 2.012 2.027 1.995 2.037 2.028 2.020 2.014 2.008 2.002 2.057 2.023 0.000 0.001 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.001 0.000 0.001 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.432 1.456 1.459 1.450 1.480 1.491 1.499 1.479 1.458 1.482 1.447 1.469 1.494 1.390 1.442 0.038 0.031 0.032 0.036 0.031 0.037 0.034 0.032 0.031 0.032 0.026 0.031 0.028 0.025 0.032 0.565 0.557 0.553 0.563 0.563 0.563 0.558 0.558 0.557 0.568 0.574 0.546 0.560 0.586 0.546 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.013 1.006 1.018 0.976 0.977 0.961 0.962 0.961 0.962 0.985 0.993 0.983 1.007 0.938 0.998 8.025 8.026 8.036 8.022 8.028 8.033 8.025 8.024 8.011 8.039 8.023 8.016 8.045 7.983 8.015

0.450 0.458 0.448 0.459 0.464 0.462 0.472 0.468 0.475 0.453 0.457 0.472 0.452 0.477 0.464 0.013 0.010 0.011 0.012 0.010 0.012 0.011 0.011 0.010 0.011 0.009 0.010 0.009 0.008 0.011 0.188 0.186 0.184 0.188 0.188 0.188 0.186 0.186 0.186 0.189 0.191 0.182 0.186 0.194 0.182 0.326 0.323 0.326 0.324 0.314 0.310 0.306 0.317 0.321 0.313 0.323 0.321 0.313 0.311 0.330 0.717 0.723 0.725 0.720 0.724 0.726 0.729 0.726 0.724 0.723 0.716 0.729 0.727 0.704 0.725 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115

38.170 37.740 37.440 37.800 38.120 37.840 37.940 37.580 37.110 37.860 37.540 37.550 37.760 37.520 38.220 0.109 0.055 0.072 0.025 0.076 0.000 0.000 0.078 0.051 0.086 0.061 0.034 0.105 0.000 0.086 21.810 21.740 21.800 21.850 22.000 21.530 21.680 21.570 21.570 22.200 21.690 21.560 21.760 21.570 21.520 0.000 0.000 0.011 0.000 0.056 0.000 0.000 0.018 0.023 0.009 0.000 0.000 0.002 0.043 0.000 0.066 0.525 0.304 0.281 0.302 0.749 0.456 0.618 0.662 0.317 0.321 0.749 0.754 0.349 0.845 21.641 22.047 21.747 21.667 21.919 21.636 21.839 21.613 21.034 22.185 21.391 21.436 21.422 21.276 21.559 0.532 0.424 0.446 0.483 0.414 0.486 0.383 0.413 0.467 0.398 0.501 0.432 0.391 0.390 0.477 4.820 4.730 4.650 4.840 4.860 4.770 4.620 4.550 4.710 4.510 4.520 4.540 4.580 4.570 4.740 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.920 12.020 12.090 12.000 12.170 12.270 12.300 12.500 12.550 12.550 12.440 12.720 13.010 12.460 12.630 99.068 99.281 98.559 98.946 99.916 99.280 99.219 98.940 98.176 100.115 98.464 99.020 99.784 98.177 100.078

2.982 2.958 2.951 2.963 2.961 2.966 2.972 2.957 2.941 2.942 2.961 2.954 2.947 2.966 2.973 0.006 0.003 0.004 0.001 0.004 0.000 0.000 0.005 0.003 0.005 0.004 0.002 0.006 0.000 0.005 2.008 2.008 2.026 2.019 2.014 1.989 2.001 2.001 2.015 2.034 2.016 1.999 2.002 2.010 1.973 0.000 0.000 0.001 0.000 0.003 0.000 0.000 0.001 0.001 0.001 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.418 1.476 1.452 1.437 1.441 1.463 1.457 1.459 1.434 1.460 1.430 1.455 1.443 1.428 1.452 0.035 0.028 0.030 0.032 0.027 0.032 0.025 0.027 0.031 0.026 0.033 0.029 0.026 0.026 0.031 0.561 0.553 0.546 0.566 0.563 0.557 0.539 0.534 0.556 0.522 0.531 0.532 0.533 0.539 0.550 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.998 1.009 1.021 1.008 1.013 1.031 1.032 1.054 1.066 1.045 1.051 1.072 1.088 1.056 1.053 8.008 8.035 8.031 8.026 8.026 8.039 8.028 8.037 8.048 8.036 8.027 8.044 8.045 8.027 8.036

0.462 0.455 0.451 0.452 0.452 0.448 0.458 0.447 0.428 0.449 0.448 0.439 0.433 0.448 0.445 0.012 0.009 0.010 0.011 0.009 0.011 0.008 0.009 0.010 0.009 0.011 0.010 0.009 0.009 0.010 0.187 0.184 0.182 0.188 0.187 0.185 0.180 0.178 0.185 0.174 0.177 0.177 0.177 0.179 0.183 0.331 0.321 0.331 0.327 0.327 0.321 0.330 0.332 0.334 0.339 0.341 0.335 0.340 0.340 0.325 0.716 0.728 0.727 0.718 0.719 0.724 0.730 0.732 0.720 0.737 0.729 0.732 0.730 0.726 0.725 116 117 118 119 120 121 122 123 124 125 126 127 128

37.810 37.750 37.870 37.740 37.620 37.970 37.490 42.530 37.760 37.510 37.610 37.460 37.770 0.002 0.057 0.114 0.036 0.051 0.044 0.000 0.053 0.025 0.113 0.065 0.094 0.013 21.550 22.000 21.750 21.730 21.460 21.880 21.740 22.090 21.620 21.520 21.400 21.560 21.500 0.023 0.000 0.034 0.025 0.009 0.036 0.036 0.014 0.036 0.061 0.000 0.069 0.031 0.510 0.144 0.397 0.489 0.361 0.536 0.472 0.000 0.337 0.256 0.878 0.295 0.390 21.651 21.990 21.692 21.710 21.715 22.208 21.825 18.690 21.927 21.899 22.430 22.615 23.519 0.424 0.424 0.482 0.589 0.458 0.462 0.410 0.323 0.492 0.512 0.718 0.702 0.726 4.660 4.630 4.840 4.830 4.740 4.780 4.800 4.260 4.830 4.740 4.840 4.920 4.940 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.250 12.090 12.070 11.980 11.760 12.050 11.970 9.620 11.640 11.540 11.300 10.640 9.990 98.880 99.085 99.249 99.128 98.174 99.966 98.743 97.580 98.667 98.152 99.241 98.355 98.878

2.972 2.957 2.962 2.959 2.975 2.956 2.952 3.255 2.971 2.967 2.959 2.963 2.977 0.000 0.003 0.007 0.002 0.003 0.003 0.000 0.003 0.001 0.007 0.004 0.006 0.001 1.996 2.031 2.005 2.008 2.000 2.008 2.018 1.993 2.005 2.007 1.985 2.010 1.997 0.001 0.000 0.002 0.002 0.001 0.002 0.002 0.001 0.002 0.004 0.000 0.004 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.453 1.449 1.443 1.453 1.458 1.477 1.465 1.196 1.463 1.464 1.528 1.513 1.573 0.028 0.028 0.032 0.039 0.031 0.030 0.027 0.021 0.033 0.034 0.048 0.047 0.048 0.546 0.541 0.564 0.565 0.559 0.555 0.563 0.486 0.567 0.559 0.568 0.580 0.580 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.032 1.015 1.012 1.007 0.996 1.005 1.010 0.789 0.981 0.978 0.953 0.902 0.844 8.029 8.024 8.027 8.034 8.022 8.036 8.038 7.745 8.024 8.021 8.044 8.025 8.023

0.455 0.458 0.451 0.449 0.463 0.455 0.450 0.473 0.463 0.465 0.463 0.478 0.501 0.009 0.009 0.011 0.013 0.010 0.010 0.009 0.007 0.011 0.011 0.016 0.016 0.016 0.182 0.180 0.188 0.188 0.186 0.185 0.188 0.159 0.189 0.186 0.189 0.193 0.193 0.328 0.334 0.324 0.320 0.321 0.318 0.321 0.257 0.316 0.316 0.291 0.289 0.268 0.727 0.728 0.719 0.720 0.723 0.727 0.722 0.711 0.721 0.724 0.729 0.723 0.731 Table 6. Chemical analysis of garnet B.

Analytical Point 129 130 131 132 133 134 135 136

SiO2 37.570 37.970 37.750 37.820 37.930 37.750 37.890 37.870

TiO2 0.021 0.143 0.013 0.105 0.084 0.082 0.059 0.015

Al2O3 21.730 21.500 21.910 21.790 21.790 21.740 21.300 21.470 CrO3 0.051 0.058 0.000 0.058 0.038 0.038 0.000 0.040

Fe2O3 0.375 0.329 0.333 0.355 0.369 0.200 0.822 0.467 FeO 22.542 21.904 22.391 22.280 22.118 22.290 22.320 22.230 MnO 0.812 0.571 0.439 0.469 0.409 0.485 0.522 0.551 MgO 4.630 4.790 4.860 4.740 4.820 4.730 4.840 4.570 NiO 0.000 0.000 0.000 0.032 0.042 0.000 0.000 0.026 ZnO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 CaO 11.270 11.650 11.530 11.730 11.820 11.500 11.490 11.720 Total 99.002 98.915 99.225 99.380 99.420 98.815 99.243 98.959

Si 2.957 2.980 2.957 2.959 2.964 2.967 2.976 2.979 Ti 0.001 0.008 0.001 0.006 0.005 0.005 0.003 0.001 Al 2.016 1.989 2.023 2.010 2.007 2.014 1.972 1.990 Cr 0.003 0.004 0.000 0.004 0.002 0.002 0.000 0.003 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 1.506 1.457 1.486 1.479 1.467 1.477 1.515 1.490 Mn 0.054 0.038 0.029 0.031 0.027 0.032 0.035 0.037 Mg 0.543 0.560 0.567 0.553 0.561 0.554 0.567 0.536 Ni 0.000 0.000 0.000 0.002 0.003 0.000 0.000 0.002 Zn 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.951 0.980 0.968 0.984 0.990 0.968 0.967 0.988 Total 8.032 8.016 8.031 8.028 8.026 8.020 8.035 8.024

XAlm 0.469 0.467 0.464 0.464 0.462 0.470 0.468 0.472

XSps 0.018 0.013 0.010 0.010 0.009 0.011 0.012 0.012

XPyr 0.181 0.187 0.189 0.184 0.187 0.185 0.189 0.178

XGrs 0.304 0.315 0.312 0.315 0.318 0.316 0.297 0.314

XFe 0.735 0.722 0.724 0.728 0.723 0.727 0.728 0.735

Structural formula calculated based 12 oxygens. 137 138 139 140 141 142 143 144 145

37.790 37.690 37.890 37.310 37.580 38.060 37.270 37.640 38.070 0.019 0.145 0.063 0.080 0.080 0.034 0.019 0.088 0.059 21.570 21.680 21.990 21.700 21.640 21.590 21.600 21.660 21.500 0.025 0.085 0.092 0.002 0.038 0.047 0.029 0.034 0.034 0.471 0.540 0.144 0.674 0.366 0.459 0.514 0.501 0.591 22.356 22.384 22.380 22.064 21.970 21.967 21.547 21.759 21.698 0.453 0.461 0.451 0.464 0.409 0.441 0.550 0.483 0.474 4.730 4.720 4.750 4.780 4.780 4.730 4.660 4.620 4.720 0.000 0.000 0.018 0.000 0.000 0.000 0.004 0.044 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.560 11.760 11.690 11.860 11.740 12.000 12.090 12.210 12.240 98.973 99.465 99.468 98.934 98.603 99.327 98.283 99.039 99.386

2.971 2.953 2.958 2.940 2.961 2.977 2.951 2.957 2.978 0.001 0.009 0.004 0.005 0.005 0.002 0.001 0.005 0.003 1.999 2.002 2.024 2.015 2.010 1.991 2.016 2.006 1.982 0.002 0.005 0.006 0.000 0.002 0.003 0.002 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.498 1.498 1.470 1.494 1.470 1.464 1.457 1.459 1.454 0.030 0.031 0.030 0.031 0.027 0.029 0.037 0.032 0.031 0.554 0.551 0.553 0.561 0.561 0.552 0.550 0.541 0.550 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.974 0.987 0.978 1.001 0.991 1.006 1.026 1.028 1.026 8.028 8.035 8.023 8.048 8.028 8.024 8.039 8.034 8.027

0.470 0.461 0.466 0.448 0.460 0.463 0.446 0.451 0.456 0.010 0.010 0.010 0.010 0.009 0.010 0.012 0.011 0.010 0.185 0.183 0.184 0.187 0.187 0.184 0.183 0.180 0.183 0.310 0.310 0.319 0.313 0.318 0.320 0.325 0.326 0.323 0.730 0.731 0.727 0.727 0.724 0.726 0.726 0.730 0.725 146 147 148 149 150 151 152 153 154

37.860 37.930 37.490 37.620 37.970 37.810 37.720 37.870 37.590 0.090 0.103 0.034 0.057 0.061 0.036 0.069 0.112 0.061 21.760 21.840 21.640 21.710 21.740 21.570 21.650 21.780 21.400 0.000 0.000 0.034 0.023 0.020 0.000 0.016 0.000 0.023 0.814 0.010 0.599 0.732 0.308 0.459 0.758 0.796 0.723 22.047 22.231 21.731 21.701 21.733 21.617 21.788 21.734 21.279 0.368 0.605 0.362 0.510 0.380 0.402 0.440 0.435 0.438 4.860 4.370 4.590 4.670 4.550 4.580 4.660 4.670 4.540 0.016 0.000 0.022 0.000 0.024 0.000 0.044 0.000 0.094 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.230 11.910 12.390 12.450 12.420 12.370 12.420 12.710 12.620 100.046 98.999 98.891 99.473 99.206 98.844 99.565 100.106 98.769

2.949 2.975 2.952 2.947 2.972 2.972 2.953 2.948 2.963 0.005 0.006 0.002 0.003 0.004 0.002 0.004 0.007 0.004 1.998 2.019 2.008 2.005 2.005 1.999 1.998 1.999 1.989 0.000 0.000 0.002 0.001 0.001 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.484 1.459 1.467 1.465 1.441 1.448 1.471 1.462 1.446 0.024 0.040 0.024 0.034 0.025 0.027 0.029 0.029 0.029 0.564 0.511 0.539 0.545 0.531 0.537 0.544 0.542 0.534 0.001 0.000 0.001 0.000 0.002 0.000 0.003 0.000 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.021 1.001 1.045 1.045 1.042 1.042 1.042 1.060 1.066 8.047 8.010 8.041 8.046 8.021 8.026 8.044 8.046 8.038

0.446 0.474 0.447 0.440 0.458 0.455 0.445 0.438 0.444 0.008 0.013 0.008 0.011 0.008 0.009 0.010 0.010 0.010 0.188 0.170 0.179 0.181 0.177 0.179 0.181 0.180 0.178 0.316 0.333 0.329 0.326 0.337 0.333 0.324 0.329 0.333 0.724 0.741 0.731 0.729 0.731 0.730 0.730 0.730 0.730 155 156 157 158 159 160 161 162 163

37.260 37.790 37.760 37.820 38.120 37.880 37.710 37.860 37.720 0.021 0.023 0.069 0.084 0.025 0.074 0.030 0.072 0.067 21.690 21.590 21.530 21.640 21.440 21.570 21.750 21.740 21.700 0.000 0.000 0.052 0.011 0.036 0.034 0.000 0.000 0.000 0.480 0.895 0.687 0.673 0.665 0.211 0.553 0.642 0.555 21.608 21.295 21.692 21.564 21.852 21.170 21.632 21.853 21.620 0.351 0.474 0.498 0.396 0.362 0.249 0.435 0.429 0.366 4.430 4.670 4.540 4.550 4.600 4.660 4.640 4.580 4.640 0.020 0.048 0.000 0.002 0.000 0.056 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.540 12.840 12.500 12.760 12.400 12.500 12.480 12.540 12.510 98.400 99.625 99.328 99.501 99.499 98.404 99.230 99.715 99.179

2.948 2.956 2.962 2.959 2.981 2.981 2.956 2.957 2.958 0.001 0.001 0.004 0.005 0.001 0.004 0.002 0.004 0.004 2.023 1.990 1.990 1.996 1.976 2.001 2.010 2.001 2.006 0.000 0.000 0.003 0.001 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.458 1.446 1.463 1.451 1.468 1.406 1.451 1.465 1.451 0.024 0.031 0.033 0.026 0.024 0.017 0.029 0.028 0.024 0.522 0.544 0.531 0.531 0.536 0.547 0.542 0.533 0.542 0.001 0.003 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.063 1.076 1.051 1.070 1.039 1.054 1.048 1.049 1.051 8.040 8.048 8.037 8.038 8.028 8.014 8.037 8.038 8.036

0.446 0.434 0.448 0.443 0.460 0.454 0.445 0.448 0.446 0.008 0.010 0.011 0.009 0.008 0.006 0.010 0.009 0.008 0.174 0.181 0.177 0.177 0.178 0.182 0.180 0.177 0.181 0.340 0.332 0.328 0.336 0.325 0.344 0.333 0.330 0.334 0.736 0.726 0.734 0.732 0.732 0.720 0.728 0.733 0.728 164 165 166 167 168 169 170 171 172

37.640 37.690 37.460 37.570 37.990 37.560 37.710 37.720 37.610 0.000 0.000 0.063 0.070 0.048 0.023 0.084 0.044 0.008 21.720 21.610 21.760 21.710 21.590 21.610 21.360 21.570 21.570 0.000 0.031 0.000 0.000 0.025 0.025 0.000 0.007 0.000 0.656 0.848 0.659 0.661 0.364 0.560 0.514 0.273 0.716 21.990 21.487 21.497 21.305 21.832 21.466 21.258 21.444 21.296 0.430 0.441 0.504 0.466 0.369 0.422 0.389 0.358 0.434 4.490 4.610 4.610 4.680 4.490 4.680 4.430 4.550 4.720 0.000 0.008 0.044 0.000 0.022 0.000 0.028 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.450 12.780 12.570 12.680 12.350 12.390 12.670 12.370 12.570 99.375 99.506 99.167 99.142 99.080 98.736 98.443 98.338 98.924

2.953 2.953 2.943 2.949 2.979 2.958 2.977 2.975 2.958 0.000 0.000 0.004 0.004 0.003 0.001 0.005 0.003 0.000 2.008 1.995 2.015 2.008 1.995 2.006 1.988 2.005 1.999 0.000 0.002 0.000 0.000 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.481 1.458 1.451 1.437 1.453 1.447 1.434 1.431 1.443 0.029 0.029 0.034 0.031 0.024 0.028 0.026 0.024 0.029 0.525 0.538 0.540 0.548 0.525 0.549 0.521 0.535 0.553 0.000 0.001 0.003 0.000 0.001 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.047 1.073 1.058 1.066 1.038 1.046 1.072 1.045 1.059 8.043 8.049 8.046 8.043 8.020 8.037 8.024 8.019 8.042

0.450 0.436 0.436 0.434 0.464 0.444 0.452 0.457 0.438 0.010 0.010 0.011 0.010 0.008 0.009 0.009 0.008 0.010 0.175 0.179 0.180 0.182 0.175 0.183 0.174 0.178 0.184 0.329 0.331 0.333 0.335 0.334 0.331 0.342 0.340 0.331 0.738 0.730 0.729 0.724 0.735 0.725 0.733 0.728 0.723 173 174 175 176 177 178 179 180 181

37.120 37.580 37.400 37.620 37.720 38.010 0.211 0.060 0.212 0.061 0.053 0.080 0.086 0.137 0.021 0.000 0.000 0.014 21.640 21.350 21.530 21.600 21.520 21.680 0.153 0.046 0.052 0.027 0.000 0.000 0.000 0.036 0.000 0.000 0.018 0.011 0.447 0.728 0.615 0.740 0.443 0.384 0.096 0.066 0.026 21.318 21.455 21.597 21.694 21.632 21.625 0.150 0.134 0.094 0.425 0.422 0.497 0.471 0.459 0.377 0.032 0.000 0.037 4.500 4.610 4.560 4.640 4.570 4.700 0.046 0.000 0.010 0.002 0.018 0.000 0.040 0.000 0.016 0.036 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.520 12.390 12.310 12.390 12.280 12.310 0.091 0.040 0.050 98.059 98.605 98.589 99.281 98.796 99.122 0.814 0.364 0.507

2.945 2.967 2.954 2.953 2.968 2.976 2.277 1.678 3.394 0.004 0.003 0.005 0.005 0.008 0.001 0.000 0.000 0.174 2.023 1.987 2.005 1.998 1.996 2.001 1.943 1.513 0.983 0.002 0.000 0.000 0.000 0.002 0.000 0.000 0.407 0.141 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.441 1.460 1.463 1.468 1.450 1.438 2.138 4.560 1.575 0.029 0.028 0.033 0.031 0.031 0.025 0.288 0.000 0.502 0.532 0.543 0.537 0.543 0.536 0.548 0.747 0.000 0.239 0.000 0.001 0.000 0.003 0.000 0.001 0.311 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.064 1.048 1.042 1.042 1.035 1.033 1.047 1.204 0.864 8.039 8.037 8.039 8.043 8.025 8.023 8.752 9.362 7.871

0.439 0.449 0.447 0.445 0.455 0.456 0.063 0.149 0.179 0.009 0.009 0.011 0.010 0.010 0.008 0.093 0.000 0.165 0.177 0.181 0.179 0.181 0.178 0.183 0.241 0.000 0.079 0.340 0.327 0.329 0.325 0.330 0.333 0.000 0.000 0.062 0.730 0.729 0.732 0.730 0.730 0.724 0.741 1.000 0.868 182 183 184 185 186 187 188 189 190

0.106 0.134 0.973 22.440 37.430 37.310 37.860 37.490 37.480 0.000 0.000 0.000 0.093 0.019 0.099 0.000 0.088 0.082 0.060 0.038 0.567 12.990 21.680 21.700 21.650 21.520 21.910 0.000 0.047 0.000 0.000 0.047 0.043 0.034 0.025 0.000 0.063 0.031 0.000 6.546 0.481 0.508 0.095 0.565 0.494 0.104 0.135 0.471 15.940 21.998 21.943 22.534 22.561 22.965 0.000 0.000 0.000 0.503 0.544 0.557 0.631 0.637 0.535 0.018 0.000 0.150 2.770 4.950 5.020 4.950 4.970 4.970 0.000 0.008 0.024 0.010 0.000 0.022 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.054 0.039 0.287 11.000 11.460 11.400 10.710 10.860 10.930 0.406 0.432 2.471 72.292 98.608 98.601 98.464 98.730 99.366

2.369 2.795 3.000 2.625 2.952 2.943 2.982 2.958 2.940 0.000 0.000 0.000 0.008 0.001 0.006 0.000 0.005 0.005 1.576 0.941 2.060 1.791 2.015 2.018 2.010 2.001 2.026 0.000 0.774 0.000 0.000 0.003 0.003 0.002 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 3.002 2.843 1.214 2.135 1.479 1.478 1.490 1.522 1.536 0.000 0.000 0.000 0.050 0.036 0.037 0.042 0.043 0.036 0.608 0.000 0.690 0.483 0.582 0.590 0.581 0.585 0.581 0.000 0.131 0.060 0.001 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.289 0.864 0.947 1.379 0.968 0.964 0.904 0.918 0.919 8.844 8.348 7.970 8.472 8.038 8.040 8.012 8.035 8.042

0.151 0.461 0.422 0.232 0.455 0.450 0.485 0.470 0.468 0.000 0.000 0.000 0.016 0.012 0.012 0.014 0.014 0.012 0.194 0.000 0.229 0.157 0.194 0.197 0.194 0.195 0.193 0.000 0.000 0.314 0.167 0.307 0.304 0.297 0.288 0.291 0.832 1.000 0.638 0.816 0.718 0.715 0.719 0.723 0.725 191 192 193 194 195 196 197 198 199

37.570 37.290 37.630 37.820 37.360 37.660 37.800 37.550 37.610 0.038 0.069 0.107 0.105 0.074 0.076 0.013 0.085 0.063 21.710 21.750 21.830 21.860 21.630 21.680 21.690 22.180 22.030 0.056 0.018 0.002 0.056 0.025 0.000 0.016 0.000 0.000 0.388 0.509 0.240 0.216 0.581 0.371 0.388 0.355 0.638 23.471 23.292 22.574 22.306 22.168 21.926 21.911 22.541 22.446 0.580 0.590 0.535 0.464 0.457 0.497 0.501 0.450 0.545 4.930 5.060 4.660 4.760 4.770 4.730 4.810 4.780 5.070 0.002 0.000 0.004 0.000 0.000 0.083 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 10.310 10.300 11.400 11.640 11.670 11.760 11.790 11.750 11.490 99.054 98.878 98.982 99.227 98.733 98.782 98.919 99.690 99.894

2.957 2.942 2.957 2.961 2.948 2.963 2.968 2.932 2.934 0.002 0.004 0.006 0.006 0.004 0.004 0.001 0.005 0.004 2.014 2.023 2.022 2.017 2.012 2.011 2.007 2.042 2.025 0.003 0.001 0.000 0.003 0.002 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.568 1.567 1.498 1.473 1.497 1.465 1.462 1.493 1.502 0.039 0.039 0.036 0.031 0.031 0.033 0.033 0.030 0.036 0.578 0.595 0.546 0.555 0.561 0.555 0.563 0.556 0.589 0.000 0.000 0.000 0.000 0.000 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.870 0.871 0.960 0.976 0.987 0.991 0.992 0.983 0.960 8.032 8.042 8.025 8.023 8.041 8.027 8.027 8.042 8.050

0.490 0.478 0.472 0.466 0.456 0.461 0.459 0.454 0.449 0.013 0.013 0.012 0.010 0.010 0.011 0.011 0.010 0.012 0.193 0.198 0.182 0.185 0.187 0.185 0.187 0.185 0.196 0.276 0.274 0.313 0.317 0.310 0.319 0.318 0.317 0.301 0.731 0.725 0.733 0.726 0.727 0.725 0.722 0.728 0.718 200 201 202 203 204 205 206 207 208

37.480 37.480 37.500 37.680 37.780 37.740 37.680 37.500 37.890 0.000 0.080 0.065 0.000 0.044 0.061 0.103 0.000 0.000 21.590 21.540 21.570 21.440 21.340 21.540 21.670 21.820 21.650 0.000 0.020 0.000 0.000 0.063 0.054 0.000 0.050 0.000 0.635 0.521 0.691 0.503 0.606 0.485 0.398 0.550 0.456 22.168 21.631 21.958 21.587 21.905 21.883 22.042 22.195 22.190 0.493 0.503 0.372 0.513 0.644 0.463 0.512 0.444 0.470 4.700 4.790 4.820 4.820 4.740 4.790 4.660 4.840 4.900 0.000 0.000 0.044 0.010 0.000 0.018 0.012 0.010 0.038 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.760 11.920 11.880 11.820 11.680 11.820 11.840 11.760 11.490 98.826 98.486 98.901 98.373 98.802 98.855 98.917 99.168 99.084

2.956 2.959 2.953 2.975 2.976 2.968 2.962 2.945 2.972 0.000 0.005 0.004 0.000 0.003 0.004 0.006 0.000 0.000 2.007 2.004 2.002 1.995 1.981 1.997 2.008 2.020 2.001 0.000 0.001 0.000 0.000 0.004 0.003 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.500 1.459 1.487 1.455 1.479 1.468 1.473 1.490 1.482 0.033 0.034 0.025 0.034 0.043 0.031 0.034 0.030 0.031 0.552 0.564 0.566 0.567 0.557 0.562 0.546 0.567 0.573 0.000 0.000 0.003 0.001 0.000 0.001 0.001 0.001 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.994 1.008 1.002 1.000 0.986 0.996 0.997 0.990 0.966 8.041 8.034 8.042 8.028 8.029 8.029 8.028 8.044 8.028

0.458 0.450 0.453 0.457 0.463 0.459 0.461 0.452 0.467 0.011 0.011 0.008 0.011 0.014 0.010 0.011 0.010 0.010 0.184 0.188 0.188 0.189 0.185 0.187 0.182 0.189 0.191 0.312 0.320 0.313 0.318 0.308 0.316 0.320 0.312 0.308 0.731 0.721 0.724 0.720 0.727 0.723 0.729 0.725 0.721 209 210 211 212 213 214 215 216 217

37.470 37.390 37.830 37.670 37.730 24.780 37.260 37.580 37.520 0.120 0.078 0.103 0.025 0.074 0.072 0.076 0.013 0.099 21.820 21.700 21.820 21.660 21.440 13.040 21.850 21.600 21.740 0.000 0.000 0.002 0.000 0.014 0.000 0.049 0.000 0.000 0.723 0.754 0.489 0.384 0.470 5.057 0.357 0.617 0.509 22.360 22.011 22.190 22.205 22.027 18.799 22.209 22.395 22.302 0.490 0.474 0.510 0.431 0.407 0.216 0.541 0.447 0.488 4.900 5.010 4.890 4.740 4.700 4.380 4.690 4.730 4.690 0.024 0.000 0.000 0.046 0.066 0.062 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.660 11.680 11.710 11.590 11.700 6.170 11.660 11.610 11.740 99.567 99.098 99.545 98.751 98.628 72.576 98.692 98.992 99.088

2.935 2.940 2.956 2.966 2.975 2.815 2.939 2.958 2.950 0.007 0.005 0.006 0.001 0.004 0.006 0.004 0.001 0.006 2.015 2.011 2.009 2.010 1.992 1.746 2.032 2.004 2.014 0.000 0.000 0.000 0.000 0.001 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.508 1.492 1.479 1.485 1.480 2.219 1.486 1.511 1.496 0.033 0.032 0.034 0.029 0.027 0.021 0.036 0.030 0.033 0.572 0.587 0.570 0.556 0.552 0.742 0.552 0.555 0.550 0.002 0.000 0.000 0.003 0.004 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.979 0.984 0.980 0.978 0.988 0.751 0.986 0.979 0.989 8.050 8.050 8.034 8.028 8.024 8.305 8.039 8.039 8.037

0.450 0.445 0.457 0.467 0.468 0.426 0.455 0.464 0.459 0.011 0.011 0.011 0.010 0.009 0.007 0.012 0.010 0.011 0.190 0.195 0.190 0.185 0.184 0.243 0.184 0.185 0.183 0.304 0.305 0.312 0.314 0.315 0.034 0.316 0.308 0.314 0.725 0.718 0.722 0.727 0.728 0.749 0.729 0.731 0.731 218 219 220 221 222 223 224 225 226

37.470 37.420 37.730 37.850 37.560 37.460 37.540 37.580 37.540 0.059 0.059 0.055 0.013 0.101 0.034 0.061 0.015 0.131 21.600 21.770 21.690 21.630 21.690 21.450 21.760 21.630 21.900 0.011 0.000 0.045 0.022 0.011 0.002 0.000 0.000 0.000 0.459 0.608 0.554 0.520 0.308 0.664 0.498 0.532 0.399 21.957 22.553 22.132 22.432 22.193 22.062 22.402 22.172 22.411 0.424 0.448 0.365 0.494 0.362 0.488 0.440 0.401 0.443 4.890 4.700 4.950 4.760 4.820 4.860 4.810 4.780 4.860 0.056 0.000 0.012 0.018 0.000 0.050 0.000 0.064 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.530 11.640 11.690 11.540 11.520 11.480 11.540 11.650 11.520 98.457 99.198 99.223 99.279 98.565 98.551 99.051 98.823 99.204

2.958 2.943 2.957 2.968 2.960 2.960 2.951 2.960 2.944 0.004 0.003 0.003 0.001 0.006 0.002 0.004 0.001 0.008 2.010 2.018 2.004 1.999 2.015 1.998 2.016 2.008 2.025 0.001 0.000 0.003 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.477 1.519 1.483 1.502 1.481 1.498 1.502 1.492 1.494 0.028 0.030 0.024 0.033 0.024 0.033 0.029 0.027 0.029 0.576 0.551 0.578 0.556 0.566 0.573 0.564 0.561 0.568 0.004 0.000 0.001 0.001 0.000 0.003 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.975 0.981 0.982 0.970 0.973 0.972 0.972 0.983 0.968 8.033 8.045 8.036 8.031 8.026 8.039 8.038 8.035 8.036

0.459 0.460 0.457 0.469 0.465 0.460 0.461 0.462 0.459 0.009 0.010 0.008 0.011 0.008 0.011 0.010 0.009 0.010 0.192 0.183 0.193 0.185 0.189 0.191 0.188 0.187 0.189 0.311 0.308 0.309 0.307 0.315 0.304 0.309 0.312 0.311 0.720 0.734 0.719 0.730 0.723 0.723 0.727 0.727 0.724 227 228

37.480 37.310 0.091 0.109 21.680 21.440 0.000 0.000 0.319 0.629 22.243 22.594 0.515 0.659 4.850 4.570 0.038 0.000 0.000 0.000 11.250 11.290 98.465 98.601

2.959 2.955 0.005 0.007 2.017 2.001 0.000 0.000 0.000 0.000 1.487 1.534 0.034 0.044 0.571 0.540 0.002 0.000 0.000 0.000 0.952 0.958 8.028 8.038

0.467 0.470 0.011 0.015 0.190 0.180 0.307 0.300 0.723 0.740 Table 7. Chemical analysis of garnet C.

Analytical Point 229 230 231 232 233 234 235 236

SiO2 37.440 37.500 37.280 37.770 37.770 37.450 37.510 37.320

TiO2 0.105 0.038 0.063 0.070 0.046 0.019 0.070 0.093

Al2O3 21.680 21.640 21.570 21.400 21.720 21.780 21.710 21.390 CrO3 0.038 0.036 0.038 0.067 0.038 0.027 0.047 0.000

Fe2O3 0.641 0.699 0.475 0.851 0.288 0.646 0.378 0.853 FeO 23.033 22.361 21.643 21.414 21.621 21.759 21.580 21.322 MnO 0.665 0.654 0.511 0.441 0.489 0.551 0.389 0.508 MgO 4.590 4.640 4.560 4.840 4.900 4.650 4.620 4.730 NiO 0.036 0.000 0.028 0.042 0.008 0.044 0.000 0.000 ZnO 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 CaO 11.210 11.720 12.120 12.360 11.840 12.280 12.340 12.350 Total 99.438 99.288 98.288 99.255 98.720 99.206 98.643 98.566

Si 2.944 2.949 2.952 2.963 2.967 2.942 2.955 2.950 Ti 0.006 0.002 0.004 0.004 0.003 0.001 0.004 0.006 Al 2.009 2.006 2.013 1.979 2.011 2.017 2.016 1.993 Cr 0.002 0.002 0.002 0.004 0.002 0.002 0.003 0.000 Fe3+ 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Fe2+ 1.553 1.512 1.462 1.455 1.437 1.468 1.444 1.461 Mn 0.044 0.044 0.034 0.029 0.033 0.037 0.026 0.034 Mg 0.538 0.544 0.538 0.566 0.574 0.545 0.543 0.557 Ni 0.002 0.000 0.002 0.003 0.001 0.003 0.000 0.000 Zn 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Ca 0.945 0.987 1.028 1.039 0.997 1.034 1.042 1.046 Total 8.044 8.045 8.036 8.042 8.024 8.047 8.032 8.047

XAlm 0.472 0.457 0.450 0.442 0.454 0.442 0.448 0.437

XSps 0.015 0.014 0.011 0.010 0.011 0.012 0.009 0.011

XPyr 0.179 0.181 0.179 0.188 0.191 0.181 0.181 0.185

XGrs 0.294 0.307 0.327 0.318 0.322 0.324 0.334 0.323

XFe 0.743 0.735 0.731 0.720 0.715 0.729 0.727 0.724

Structural formula calculated based 12 oxygens. #Analyse point used in geothermobarometric calculation. 237 238 239 240 241 242 243 244 245

37.820 37.560 37.800 37.630 37.350 37.960 37.320 37.560 37.640 0.019 0.061 0.055 0.133 0.072 0.080 0.105 0.055 0.011 21.660 21.590 21.580 21.600 21.530 21.420 21.650 21.600 21.720 0.027 0.000 0.016 0.036 0.074 0.014 0.009 0.041 0.041 0.605 0.480 0.717 0.817 0.452 0.641 0.695 0.454 0.431 21.706 21.758 21.555 21.395 21.403 21.473 21.544 21.371 21.582 0.555 0.479 0.483 0.532 0.316 0.402 0.435 0.427 0.404 4.770 4.560 4.630 4.800 4.580 4.670 4.610 4.600 4.590 0.032 0.000 0.000 0.000 0.006 0.058 0.042 0.010 0.050 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.140 12.180 12.560 12.500 12.440 12.420 12.480 12.470 12.420 99.334 98.668 99.395 99.442 98.223 99.138 98.891 98.588 98.888

2.962 2.961 2.961 2.948 2.956 2.977 2.941 2.961 2.959 0.001 0.004 0.003 0.008 0.004 0.005 0.006 0.003 0.001 2.000 2.006 1.993 1.994 2.008 1.980 2.011 2.007 2.013 0.002 0.000 0.001 0.002 0.005 0.001 0.001 0.003 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.457 1.463 1.454 1.450 1.444 1.446 1.461 1.436 1.444 0.037 0.032 0.032 0.035 0.021 0.027 0.029 0.029 0.027 0.557 0.536 0.541 0.560 0.540 0.546 0.542 0.540 0.538 0.002 0.000 0.000 0.000 0.000 0.004 0.003 0.001 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.019 1.029 1.054 1.049 1.055 1.044 1.054 1.053 1.046 8.036 8.032 8.039 8.046 8.033 8.028 8.047 8.032 8.033

0.449 0.454 0.444 0.433 0.446 0.453 0.438 0.446 0.449 0.012 0.011 0.011 0.012 0.007 0.009 0.010 0.009 0.009 0.185 0.178 0.180 0.186 0.180 0.182 0.180 0.180 0.179 0.320 0.328 0.329 0.324 0.335 0.328 0.330 0.336 0.334 0.724 0.732 0.729 0.721 0.728 0.726 0.730 0.727 0.729 246 247 248 249 250 251 252 253 254

37.860 37.710 37.710 37.840 37.510 37.380 37.340 37.740 37.480 0.097 0.023 0.053 0.042 0.025 0.000 0.057 0.011 0.108 21.530 21.460 21.640 21.740 21.330 21.530 21.440 21.650 21.430 0.002 0.072 0.018 0.000 0.029 0.009 0.016 0.000 0.041 0.545 0.654 0.641 0.526 0.913 0.991 0.979 0.745 0.648 21.570 21.252 21.393 21.387 21.129 21.509 21.609 21.400 21.287 0.374 0.391 0.391 0.451 0.404 0.300 0.301 0.434 0.401 4.530 4.560 4.580 4.630 4.560 4.690 4.680 4.690 4.600 0.000 0.000 0.000 0.050 0.052 0.000 0.000 0.050 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.580 12.780 12.780 12.650 12.850 12.700 12.540 12.650 12.570 99.087 98.902 99.206 99.316 98.802 99.108 98.962 99.369 98.564

2.971 2.966 2.957 2.961 2.959 2.943 2.945 2.956 2.959 0.006 0.001 0.003 0.002 0.002 0.000 0.003 0.001 0.006 1.991 1.989 2.000 2.005 1.983 1.998 1.993 1.999 1.994 0.000 0.004 0.001 0.000 0.002 0.001 0.001 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.448 1.437 1.441 1.431 1.448 1.475 1.483 1.446 1.444 0.025 0.026 0.026 0.030 0.027 0.020 0.020 0.029 0.027 0.530 0.535 0.535 0.540 0.536 0.550 0.550 0.548 0.541 0.000 0.000 0.000 0.003 0.003 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.058 1.077 1.074 1.061 1.086 1.071 1.060 1.062 1.063 8.028 8.036 8.039 8.034 8.047 8.058 8.055 8.043 8.037

0.452 0.442 0.440 0.443 0.436 0.433 0.437 0.439 0.442 0.008 0.009 0.009 0.010 0.009 0.007 0.007 0.010 0.009 0.176 0.178 0.178 0.180 0.178 0.183 0.183 0.182 0.180 0.336 0.337 0.338 0.338 0.333 0.327 0.323 0.331 0.333 0.732 0.729 0.729 0.726 0.730 0.728 0.729 0.725 0.727 255 256 257 258 259 260 261 262 263

35.400 37.590 37.590 37.640 37.770 37.520 37.830 37.490 37.910 0.015 0.078 0.059 0.047 0.078 0.015 0.129 0.103 0.076 20.410 21.640 21.740 21.300 21.600 21.880 21.380 21.420 21.550 0.052 0.065 0.036 0.005 0.079 0.050 0.000 0.038 0.000 0.871 0.384 0.438 0.712 0.686 0.769 0.769 0.573 0.548 20.006 20.944 21.016 20.710 21.173 21.318 21.218 20.895 20.997 0.287 0.371 0.432 0.403 0.410 0.327 0.421 0.400 0.507 4.280 4.600 4.660 4.590 4.660 4.690 4.480 4.510 4.570 0.000 0.000 0.000 0.048 0.000 0.000 0.020 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.520 12.860 12.800 12.950 12.900 13.040 12.940 12.920 12.900 93.840 98.533 98.771 98.404 99.355 99.608 99.187 98.349 99.058

2.942 2.960 2.954 2.972 2.957 2.934 2.969 2.962 2.972 0.001 0.005 0.003 0.003 0.005 0.001 0.008 0.006 0.004 1.999 2.009 2.014 1.982 1.993 2.017 1.978 1.995 1.991 0.003 0.004 0.002 0.000 0.005 0.003 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.445 1.402 1.407 1.410 1.427 1.439 1.438 1.415 1.409 0.020 0.025 0.029 0.027 0.027 0.022 0.028 0.027 0.034 0.530 0.540 0.546 0.540 0.544 0.547 0.524 0.531 0.534 0.000 0.000 0.000 0.003 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.115 1.085 1.078 1.096 1.082 1.093 1.088 1.094 1.084 8.056 8.029 8.034 8.034 8.039 8.055 8.034 8.033 8.028

0.425 0.436 0.433 0.436 0.434 0.424 0.442 0.436 0.440 0.007 0.008 0.010 0.009 0.009 0.007 0.009 0.009 0.011 0.176 0.180 0.182 0.180 0.181 0.182 0.174 0.177 0.178 0.342 0.348 0.345 0.343 0.338 0.339 0.339 0.346 0.345 0.732 0.722 0.720 0.723 0.724 0.725 0.733 0.727 0.725 264 265 266 267 268 269 270 271 272

37.710 37.520 37.730 37.350 37.410 37.830 33.480 37.100 37.360 0.017 0.076 0.059 0.021 0.017 0.072 0.053 0.078 0.068 21.540 21.680 21.460 21.460 21.530 21.380 19.160 21.530 21.370 0.016 0.016 0.000 0.002 0.020 0.025 0.025 0.016 0.000 0.543 0.660 0.621 0.762 1.074 0.440 0.000 0.519 0.907 20.532 20.986 20.911 20.744 21.214 21.124 17.140 21.243 21.014 0.443 0.459 0.389 0.509 0.398 0.411 0.440 0.365 0.351 4.690 4.600 4.590 4.590 4.710 4.490 4.100 4.290 4.590 0.002 0.078 0.058 0.022 0.000 0.000 0.014 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 13.050 12.950 12.900 12.950 12.930 12.700 9.680 12.870 12.950 98.542 99.025 98.718 98.411 99.303 98.471 84.092 98.010 98.609

2.968 2.948 2.969 2.953 2.940 2.982 3.040 2.947 2.952 0.001 0.004 0.003 0.001 0.001 0.004 0.004 0.005 0.004 1.998 2.008 1.991 2.000 1.994 1.986 2.051 2.016 1.990 0.001 0.001 0.000 0.000 0.001 0.002 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.384 1.418 1.413 1.417 1.458 1.419 1.302 1.442 1.443 0.030 0.031 0.026 0.034 0.027 0.027 0.034 0.025 0.023 0.550 0.539 0.538 0.541 0.552 0.528 0.555 0.508 0.541 0.000 0.005 0.004 0.001 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.100 1.090 1.088 1.097 1.089 1.073 0.942 1.096 1.096 8.032 8.043 8.032 8.045 8.061 8.020 7.930 8.040 8.049

0.429 0.429 0.438 0.426 0.423 0.451 0.462 0.439 0.430 0.010 0.010 0.009 0.011 0.009 0.009 0.011 0.008 0.008 0.183 0.179 0.179 0.180 0.183 0.176 0.184 0.169 0.180 0.350 0.343 0.344 0.342 0.330 0.343 0.311 0.349 0.338 0.715 0.725 0.724 0.724 0.725 0.729 0.701 0.740 0.727 273 274 275 276 277 278 279 280 281

37.730 37.780 37.470 37.590 37.790 37.460 37.780 37.880 37.690 0.125 0.084 0.070 0.068 0.082 0.030 0.072 0.061 0.110 21.820 21.560 21.780 21.240 21.350 21.620 21.510 21.490 21.410 0.000 0.000 0.007 0.014 0.070 0.029 0.018 0.034 0.043 0.479 0.574 0.587 0.690 0.869 0.914 0.629 0.570 0.623 21.319 20.993 21.021 20.889 21.048 21.057 20.744 21.007 20.840 0.445 0.402 0.382 0.379 0.356 0.415 0.381 0.358 0.434 4.450 4.610 4.610 4.430 4.520 4.500 4.580 4.420 4.490 0.000 0.000 0.052 0.014 0.014 0.068 0.046 0.010 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 13.010 12.920 12.990 12.990 13.160 13.240 13.150 13.180 13.080 99.378 98.924 98.970 98.304 99.260 99.334 98.910 99.010 98.723

2.952 2.966 2.944 2.974 2.965 2.941 2.967 2.973 2.967 0.007 0.005 0.004 0.004 0.005 0.002 0.004 0.004 0.006 2.012 1.995 2.017 1.980 1.974 2.001 1.991 1.988 1.987 0.000 0.000 0.000 0.001 0.004 0.002 0.001 0.002 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.423 1.412 1.416 1.423 1.432 1.437 1.399 1.412 1.409 0.030 0.027 0.025 0.025 0.024 0.028 0.025 0.024 0.029 0.519 0.540 0.540 0.522 0.529 0.527 0.536 0.517 0.527 0.000 0.000 0.003 0.001 0.001 0.004 0.003 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.091 1.087 1.094 1.101 1.106 1.114 1.106 1.108 1.103 8.034 8.031 8.043 8.032 8.041 8.055 8.033 8.029 8.032

0.437 0.437 0.428 0.441 0.435 0.423 0.432 0.441 0.435 0.010 0.009 0.008 0.008 0.008 0.009 0.008 0.008 0.010 0.173 0.180 0.180 0.174 0.176 0.175 0.178 0.172 0.175 0.349 0.345 0.346 0.345 0.340 0.343 0.349 0.351 0.347 0.733 0.724 0.724 0.731 0.730 0.732 0.723 0.732 0.728 282 283 284 285 286 287 288 289 290

37.770 37.930 37.550 37.620 37.380 37.810 37.640 37.630 37.610 0.042 0.129 0.089 0.053 0.036 0.087 0.068 0.078 0.110 21.940 21.970 21.650 21.800 21.600 21.760 21.600 21.490 21.780 0.014 0.014 0.043 0.000 0.000 0.068 0.070 0.000 0.000 0.629 0.358 0.869 0.268 0.760 0.520 0.594 0.737 0.761 21.484 21.338 21.168 21.049 20.987 21.082 20.925 20.937 21.006 0.385 0.482 0.426 0.450 0.415 0.489 0.495 0.528 0.367 4.670 4.490 4.680 4.600 4.620 4.620 4.580 4.450 4.720 0.000 0.020 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.890 13.010 12.960 12.720 12.960 12.970 12.990 13.120 13.130 99.824 99.740 99.475 98.559 98.757 99.405 98.961 98.970 99.483

2.944 2.954 2.942 2.960 2.946 2.955 2.957 2.960 2.941 0.002 0.008 0.005 0.003 0.002 0.005 0.004 0.005 0.006 2.016 2.017 1.999 2.021 2.007 2.005 2.000 1.992 2.008 0.001 0.001 0.003 0.000 0.000 0.004 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.437 1.411 1.438 1.401 1.428 1.409 1.410 1.421 1.419 0.025 0.032 0.028 0.030 0.028 0.032 0.033 0.035 0.024 0.543 0.521 0.547 0.539 0.543 0.538 0.536 0.522 0.550 0.000 0.001 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.077 1.086 1.088 1.072 1.095 1.086 1.093 1.106 1.100 8.045 8.030 8.052 8.027 8.048 8.035 8.037 8.040 8.049

0.432 0.438 0.425 0.439 0.426 0.432 0.431 0.432 0.421 0.008 0.011 0.009 0.010 0.009 0.011 0.011 0.012 0.008 0.181 0.174 0.182 0.180 0.181 0.179 0.179 0.174 0.183 0.339 0.351 0.335 0.349 0.342 0.344 0.344 0.346 0.344 0.726 0.730 0.725 0.722 0.725 0.724 0.724 0.731 0.721 291 292 293 294 295 296 297 298 299

37.880 37.620 37.790 38.280 37.610 38.290 37.760 37.830 37.650 0.032 0.000 0.080 0.025 0.055 0.055 0.097 0.025 0.053 21.740 21.600 21.870 22.230 21.590 21.620 21.930 21.910 21.790 0.036 0.020 0.059 0.045 0.025 0.018 0.000 0.034 0.083 0.661 0.548 0.431 0.000 0.644 0.484 0.605 0.517 0.664 21.105 20.867 21.022 21.470 21.050 21.545 21.016 21.165 21.023 0.407 0.395 0.366 0.484 0.426 0.376 0.355 0.330 0.393 4.660 4.510 4.620 4.600 4.590 4.520 4.590 4.580 4.630 0.000 0.050 0.000 0.000 0.050 0.000 0.000 0.000 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 13.070 13.070 13.120 12.690 12.890 12.800 13.360 13.200 13.160 99.591 98.680 99.358 99.824 98.930 99.707 99.712 99.590 99.486

2.957 2.962 2.952 2.968 2.957 2.982 2.944 2.951 2.944 0.002 0.000 0.005 0.001 0.003 0.003 0.006 0.001 0.003 2.000 2.004 2.014 2.032 2.001 1.985 2.015 2.015 2.008 0.002 0.001 0.004 0.003 0.002 0.001 0.000 0.002 0.005 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.417 1.406 1.399 1.392 1.422 1.432 1.406 1.411 1.414 0.027 0.026 0.024 0.032 0.028 0.025 0.023 0.022 0.026 0.542 0.529 0.538 0.532 0.538 0.525 0.533 0.533 0.540 0.000 0.003 0.000 0.000 0.003 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.093 1.103 1.098 1.054 1.086 1.068 1.116 1.103 1.103 8.040 8.035 8.034 8.013 8.039 8.021 8.043 8.039 8.046

0.431 0.434 0.430 0.450 0.434 0.454 0.423 0.431 0.425 0.009 0.009 0.008 0.011 0.009 0.008 0.008 0.007 0.009 0.180 0.176 0.179 0.177 0.179 0.175 0.178 0.177 0.180 0.343 0.350 0.351 0.350 0.342 0.341 0.354 0.351 0.345 0.723 0.727 0.722 0.724 0.726 0.732 0.725 0.726 0.724 300 301 302 303 304 305 306 307 308

37.720 37.990 37.550 38.210 37.670 37.940 37.890 37.870 38.050 0.046 0.030 0.129 0.023 0.015 0.000 0.101 0.053 0.021 21.560 21.830 21.650 21.830 21.550 21.910 22.090 21.780 21.890 0.000 0.000 0.054 0.011 0.029 0.002 0.000 0.011 0.000 0.850 0.704 0.781 0.219 0.710 0.371 0.374 0.417 0.468 20.575 21.177 20.978 20.843 21.041 21.706 21.624 21.245 21.449 0.561 0.500 0.456 0.302 0.453 0.348 0.411 0.363 0.384 4.610 4.500 4.490 4.760 4.520 4.510 4.620 4.610 4.560 0.000 0.000 0.068 0.022 0.000 0.000 0.000 0.000 0.058 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 13.360 13.310 13.260 12.960 13.050 12.730 12.780 12.850 12.910 99.282 100.040 99.415 99.180 99.039 99.518 99.890 99.198 99.790

2.956 2.955 2.943 2.979 2.960 2.962 2.947 2.963 2.962 0.003 0.002 0.008 0.001 0.001 0.000 0.006 0.003 0.001 1.991 2.002 2.000 2.006 1.996 2.016 2.025 2.009 2.009 0.000 0.000 0.003 0.001 0.002 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.399 1.419 1.421 1.372 1.425 1.439 1.428 1.415 1.424 0.037 0.033 0.030 0.020 0.030 0.023 0.027 0.024 0.025 0.539 0.522 0.525 0.553 0.529 0.525 0.536 0.538 0.529 0.000 0.000 0.004 0.001 0.000 0.000 0.000 0.000 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.122 1.109 1.114 1.083 1.099 1.065 1.065 1.077 1.077 8.046 8.042 8.048 8.016 8.041 8.030 8.034 8.029 8.032

0.419 0.430 0.424 0.441 0.433 0.449 0.439 0.441 0.443 0.012 0.011 0.010 0.007 0.010 0.008 0.009 0.008 0.008 0.179 0.174 0.175 0.184 0.176 0.175 0.178 0.179 0.176 0.348 0.349 0.346 0.354 0.344 0.344 0.344 0.346 0.345 0.722 0.731 0.730 0.713 0.729 0.733 0.727 0.725 0.729 309 310 311 312 313 314 315 316 317

37.860 38.250 38.110 37.860 38.070 37.960 37.880 37.910 38.610 0.051 0.076 0.000 0.114 0.000 0.040 0.118 0.034 0.137 21.700 22.260 21.970 21.870 21.820 21.930 22.040 22.050 22.240 0.002 0.016 0.040 0.002 0.050 0.034 0.031 0.043 0.038 0.682 0.097 0.535 0.385 0.000 0.399 0.086 0.277 0.065 21.256 21.492 21.659 21.523 21.070 21.651 21.762 21.411 21.891 0.487 0.418 0.394 0.433 0.416 0.492 0.413 0.464 0.400 4.570 4.650 4.690 4.530 4.610 4.780 4.550 4.850 4.900 0.000 0.000 0.012 0.006 0.000 0.000 0.024 0.022 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.970 12.870 12.780 12.750 12.570 12.370 12.440 12.450 12.340 99.578 100.129 100.190 99.473 98.605 99.656 99.345 99.510 100.622

2.958 2.959 2.957 2.957 2.984 2.958 2.958 2.954 2.970 0.003 0.004 0.000 0.007 0.000 0.002 0.007 0.002 0.008 1.999 2.030 2.009 2.013 2.016 2.014 2.028 2.025 2.016 0.000 0.001 0.002 0.000 0.003 0.002 0.002 0.003 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.429 1.396 1.437 1.429 1.381 1.434 1.426 1.412 1.412 0.032 0.027 0.026 0.029 0.028 0.032 0.027 0.031 0.026 0.532 0.536 0.542 0.527 0.539 0.555 0.530 0.563 0.562 0.000 0.000 0.001 0.000 0.000 0.000 0.002 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.086 1.067 1.063 1.067 1.056 1.033 1.041 1.039 1.017 8.039 8.021 8.037 8.029 8.006 8.032 8.020 8.030 8.013

0.435 0.443 0.441 0.444 0.454 0.445 0.453 0.440 0.455 0.011 0.009 0.009 0.010 0.009 0.011 0.009 0.010 0.009 0.177 0.179 0.181 0.176 0.180 0.185 0.176 0.188 0.187 0.341 0.352 0.337 0.344 0.350 0.331 0.343 0.337 0.336 0.729 0.723 0.726 0.730 0.719 0.721 0.729 0.715 0.715 318 319 320 321 322 323 324 325 326

38.020 38.080 37.970 38.170 38.210 38.010 38.310 37.860 37.780 0.112 0.053 0.036 0.069 0.080 0.006 0.048 0.004 0.000 21.820 22.080 22.060 21.940 21.810 21.720 21.750 21.680 21.820 0.005 0.038 0.011 0.056 0.027 0.031 0.000 0.027 0.092 0.385 0.281 0.368 0.462 0.429 0.652 0.706 0.686 0.504 21.693 22.097 21.559 22.054 22.014 21.573 21.644 21.752 21.837 0.350 0.391 0.478 0.397 0.378 0.466 0.504 0.370 0.425 4.730 4.680 4.930 4.690 4.590 4.630 4.910 4.730 4.660 0.000 0.060 0.000 0.000 0.082 0.012 0.000 0.000 0.026 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.420 12.280 12.330 12.430 12.390 12.700 12.420 12.440 12.380 99.535 100.040 99.741 100.269 100.010 99.801 100.293 99.550 99.523

2.965 2.957 2.953 2.960 2.970 2.963 2.969 2.960 2.954 0.007 0.003 0.002 0.004 0.005 0.000 0.003 0.000 0.000 2.006 2.021 2.022 2.005 1.998 1.996 1.987 1.998 2.011 0.000 0.002 0.001 0.003 0.002 0.002 0.000 0.002 0.006 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.437 1.452 1.424 1.457 1.456 1.445 1.444 1.463 1.458 0.023 0.026 0.031 0.026 0.025 0.031 0.033 0.025 0.028 0.550 0.542 0.572 0.542 0.532 0.538 0.567 0.551 0.543 0.000 0.004 0.000 0.000 0.005 0.001 0.000 0.000 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.038 1.022 1.028 1.033 1.032 1.061 1.031 1.042 1.037 8.026 8.028 8.033 8.031 8.025 8.037 8.035 8.040 8.038

0.451 0.456 0.440 0.452 0.460 0.444 0.445 0.447 0.448 0.008 0.009 0.010 0.009 0.008 0.010 0.011 0.008 0.009 0.183 0.180 0.190 0.181 0.177 0.179 0.189 0.183 0.181 0.334 0.331 0.331 0.329 0.330 0.333 0.323 0.326 0.328 0.723 0.728 0.714 0.729 0.732 0.729 0.718 0.726 0.729 327 328 329 330 331 332 333 334 335

37.910 37.800 38.260 37.720 37.860 38.250 38.030 38.640 38.000 0.059 0.015 0.000 0.015 0.034 0.053 0.046 0.068 0.000 21.830 22.100 22.040 22.090 21.760 21.960 21.880 22.050 21.960 0.000 0.029 0.023 0.040 0.014 0.000 0.079 0.020 0.000 0.484 0.448 0.436 0.379 0.472 0.631 0.212 0.274 0.319 21.505 21.827 21.468 21.609 20.945 21.422 21.349 21.423 21.463 0.446 0.478 0.510 0.367 0.401 0.504 0.279 0.500 0.407 4.690 4.680 4.700 4.540 4.560 4.600 4.520 4.500 4.490 0.006 0.000 0.012 0.016 0.040 0.048 0.014 0.000 0.040 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.590 12.530 12.840 12.870 13.120 13.100 12.950 13.180 12.890 99.520 99.906 100.288 99.646 99.205 100.568 99.360 100.655 99.569

2.959 2.943 2.962 2.943 2.962 2.958 2.968 2.977 2.963 0.003 0.001 0.000 0.001 0.002 0.003 0.003 0.004 0.000 2.009 2.028 2.011 2.031 2.007 2.002 2.012 2.002 2.018 0.000 0.002 0.001 0.002 0.001 0.000 0.005 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.432 1.447 1.415 1.432 1.398 1.422 1.406 1.396 1.418 0.030 0.031 0.033 0.024 0.027 0.033 0.018 0.033 0.027 0.546 0.543 0.542 0.528 0.532 0.530 0.526 0.517 0.522 0.000 0.000 0.001 0.001 0.003 0.003 0.001 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.053 1.045 1.065 1.076 1.100 1.086 1.083 1.088 1.077 8.033 8.041 8.032 8.039 8.032 8.038 8.021 8.018 8.028

0.443 0.441 0.440 0.438 0.434 0.436 0.447 0.446 0.445 0.010 0.010 0.011 0.008 0.009 0.011 0.006 0.011 0.009 0.182 0.181 0.181 0.176 0.177 0.177 0.175 0.172 0.174 0.336 0.334 0.341 0.346 0.352 0.343 0.352 0.354 0.349 0.724 0.727 0.723 0.731 0.724 0.728 0.728 0.730 0.731 336 337 338 339 340 341 342 # 343 344

38.140 37.830 38.100 37.990 37.950 38.010 38.080 37.770 38.090 0.053 0.065 0.000 0.061 0.006 0.000 0.061 0.051 0.000 22.000 21.880 22.180 21.980 21.720 22.140 22.190 21.900 21.790 0.002 0.025 0.032 0.018 0.000 0.007 0.002 0.002 0.043 0.364 0.477 0.407 0.475 0.926 0.391 0.133 0.498 0.247 21.553 21.081 21.333 21.543 21.356 21.478 21.260 21.322 21.228 0.506 0.399 0.496 0.498 0.569 0.491 0.466 0.304 0.367 4.450 4.640 4.600 4.420 4.620 4.490 4.550 4.690 4.620 0.000 0.058 0.014 0.042 0.036 0.000 0.056 0.000 0.010 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.980 13.020 13.150 13.050 13.010 13.100 13.000 12.880 12.770 100.047 99.475 100.312 100.077 100.194 100.106 99.799 99.417 99.164

2.962 2.953 2.950 2.953 2.953 2.951 2.957 2.951 2.976 0.003 0.004 0.000 0.004 0.000 0.000 0.004 0.003 0.000 2.014 2.013 2.024 2.014 1.992 2.026 2.031 2.017 2.007 0.000 0.002 0.002 0.001 0.000 0.000 0.000 0.000 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.421 1.404 1.405 1.428 1.444 1.417 1.389 1.422 1.402 0.033 0.026 0.033 0.033 0.038 0.032 0.031 0.020 0.024 0.515 0.540 0.531 0.512 0.536 0.520 0.527 0.546 0.538 0.000 0.004 0.001 0.003 0.002 0.000 0.004 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.080 1.089 1.091 1.087 1.085 1.090 1.082 1.078 1.069 8.028 8.035 8.037 8.035 8.050 8.036 8.023 8.038 8.019

0.444 0.432 0.431 0.440 0.431 0.436 0.439 0.435 0.448 0.011 0.009 0.011 0.011 0.012 0.011 0.010 0.007 0.008 0.172 0.180 0.177 0.171 0.178 0.173 0.176 0.182 0.179 0.349 0.348 0.350 0.348 0.334 0.351 0.357 0.344 0.348 0.734 0.722 0.726 0.736 0.729 0.732 0.725 0.723 0.723 345 346 347 348 349 350 351 352 353

37.980 38.210 38.180 35.210 38.300 37.950 38.270 38.180 38.150 0.101 0.150 0.034 0.065 0.074 0.128 0.040 0.055 0.097 22.280 22.070 21.990 19.970 22.110 21.850 22.040 21.940 21.850 0.085 0.036 0.000 0.065 0.023 0.040 0.123 0.132 0.061 0.000 0.172 0.231 1.544 0.317 0.467 0.221 0.346 0.256 21.580 21.925 21.793 20.340 22.084 22.080 21.801 22.209 22.080 0.317 0.446 0.272 0.481 0.508 0.406 0.382 0.418 0.411 4.510 4.610 4.820 4.700 4.920 4.950 5.140 5.030 4.920 0.000 0.000 0.000 0.000 0.082 0.000 0.012 0.032 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 12.740 12.470 12.330 11.700 11.990 11.880 11.940 11.730 11.790 99.594 100.088 99.649 94.075 100.408 99.751 99.969 100.072 99.614

2.954 2.962 2.969 2.934 2.961 2.956 2.965 2.962 2.970 0.006 0.009 0.002 0.004 0.004 0.008 0.002 0.003 0.006 2.042 2.017 2.016 1.961 2.015 2.006 2.013 2.006 2.005 0.005 0.002 0.000 0.004 0.001 0.002 0.008 0.008 0.004 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.404 1.432 1.431 1.514 1.446 1.466 1.425 1.461 1.453 0.021 0.029 0.018 0.034 0.033 0.027 0.025 0.027 0.027 0.523 0.533 0.559 0.584 0.567 0.575 0.594 0.582 0.571 0.000 0.000 0.000 0.000 0.005 0.000 0.001 0.002 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 1.062 1.036 1.027 1.045 0.993 0.992 0.991 0.975 0.984 8.016 8.020 8.021 8.080 8.027 8.032 8.023 8.027 8.019

0.449 0.455 0.455 0.422 0.455 0.454 0.451 0.459 0.463 0.007 0.010 0.006 0.011 0.011 0.009 0.008 0.009 0.009 0.174 0.178 0.186 0.194 0.189 0.191 0.198 0.194 0.190 0.351 0.339 0.336 0.296 0.321 0.315 0.320 0.311 0.318 0.729 0.729 0.719 0.722 0.718 0.718 0.706 0.715 0.718 354 355 356 357 358

38.050 38.230 38.120 38.210 38.000 0.126 0.074 0.023 0.115 0.105 21.910 21.920 21.820 21.880 21.940 0.081 0.092 0.103 0.138 0.102 0.453 0.274 0.390 0.114 0.363 22.122 22.523 22.589 23.167 23.403 0.442 0.511 0.579 0.776 0.860 5.150 4.840 4.800 4.670 4.690 0.000 0.010 0.046 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11.650 11.600 11.490 10.970 10.890 99.983 100.073 99.960 100.041 100.354

2.955 2.968 2.967 2.972 2.955 0.007 0.004 0.001 0.007 0.006 2.006 2.006 2.002 2.006 2.011 0.005 0.006 0.006 0.009 0.006 0.000 0.000 0.000 0.000 0.000 1.463 1.478 1.493 1.514 1.543 0.029 0.034 0.038 0.051 0.057 0.596 0.560 0.557 0.541 0.544 0.000 0.001 0.003 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.970 0.965 0.958 0.914 0.907 8.032 8.022 8.027 8.014 8.030

0.453 0.469 0.471 0.488 0.482 0.010 0.011 0.013 0.017 0.019 0.199 0.187 0.185 0.180 0.181 0.307 0.311 0.305 0.297 0.288 0.711 0.725 0.728 0.737 0.739