DOCSLIB.ORG

Note to Users

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Note to Users NOTE TO USERS This reproduction is the best copy available. UMI Neo-Tectonic and Rock Magnetic Study of the Circum Troodos Sedimentary Succession, Cyprus Sutwnitîed in pafîial fulfilment of ttie requirements for the degree of Supervisoc Dr. Gnham J. Bmdaik ûepactment of Geology îaketuaâ University fhunôiw Bay, OMo Canada November, 1999 National Library Bibliotheque nationale du Canada uhitions and Acquisitions et "1Bib bgiaphic Senticem ssrvices bibliographiques The author has granted a non- L'auteur a accordé une Licence non exclusive licence aîiowing the exclusive permettant à la National Library of Canada to Bibliothèque nationale du Canada de reproduce, loan, distn'bute or sel reproduire, prêter, distn'buer ou copies of diis thesis in microform, venâre des copies de cette thèse sous paper or electronic formats. la forme de microfiche/fiim, de reproduction sur papier ou sur format électronique. The author retains ownership of the L'auteur conserve la propriété du copyright in this thesis. Neither the droit d'auteur qui protège cette thèse. thesis nor substantial extracts fiom it Ni la thèse ni des extraits substautiels may be printed or othenvise de celle-ci ne doivent être imprimés reproduced without the author's ou autrement reproduits sans son permission. autorisation. Cana! The Ciram Trwdor Seâimentary Sucassion (Lata Cretaceous to Recent) overlies the Tmodos ophiolite of Cypnis, located in Vn, Eastern Witemnean. The pattern d neo-tedonic ddarmooon wm immtigated thmgh megnetic analysis of the t8donic ptdbrks. kiirobopy of maqidic mœpüôility (AM), anisotmpy of anhyWmüc remmema mognetization (AARM) and hysteresis bop parameters were detemu'ned in orckr to define the mgnetic faMc and the magnetic mineralogy. The study amWmds oviw approximately 1ûûû km2 mainly to the south of the exposed TlOOdOs ophiolite. The ample suite indudes 432 oriented hand samples, predominantly of the Ll(kwr and Pakhna Formations. Field measurementr indicatm Wingpredominantly dips less than 10' to the south, whik deavage, dips atmthan ôedding in various directions. The ôeddin@mmfp mlationthip yialds variable vei'@enœdirections suggemting gmity diding d the seâimmb tamûs kcil dmbasins. Southest of th Limassol Fmst Black abalplanar deavage msistmtly defines a SW vqpnœ . with impact to bedcâing due to r locally diit, Euly to Middle Miocem compression along NNE to NE - SSW to SW uzimuth. The AMS fabric, in part tedmic, ir controlled by the pmfed mmy a##. AMS (blhtion pdémüdîy dipr rhsllowly to the east and wst. AMS linedion v- rqionelly, fmm west to eut rcmu the study ana, fiom a NNE to NNW tmh, ~*wty.Tb bdmk AMS tacngistem aithof a late Mim sprPrubducbjon extension regime due to -rd migration d the nadivation Cypman Arc or due to Pkiatocme gravity rliding due to uuplift of Vw, Troodos Ophiolite Cmplex. The AARM ïakic ir amtmlled ecciwively by the preferred dim«uional orMathd pmAo ringk domrin magndite. Erckiding the ana in proximity to the Limasml Forslt Block, thr AARM fabric orientations are ragio~llyconsidont. AARM fdisüar phmm dig 45' to the NW mâ AARM limation is dimted NE and SW, almot orhogoml to AMS Iineatim. In som cases, in proximity to the Limassol Forest, the AARM linrdion mmb from the combined magnetic faMcs, pmlW to deavage and bedding nd is pmIW to the Wingclravage intwwdbn lhmtim. Th. .duil extension direction is to the WNW, ~~ed by the AARY, pfindoplaxes. SouWest d the Litnaud Fmst Blodc the AARM fabric mgisters the Evty to Middle MiiSW- NE campmrrion, and its tedonic expression ir conventibnal, with MAY, oriented NW and SE, parpmdiaikr to the mrnimwn comprsuion direction. iii mir project waa funôad by a N.tunl Sciemas and Engim'ng Rem Council d Cnib(NSERC) grmt to Dr. Gnhvn J. BomQile. The rack magmücs lsborsQry at LaMmâ UrdwMy wir funûd throughout the yeam alw by NSERC. Nunerous people môe thir proje& pouibk and rhould k admwledge. Fint and bmmmt, rny supefviror, Dr. 0.J. Bonadaile for giving me the oppftunity to do thir projrct, for wuiching rny knorniledge of rodc msgneticr, and providing guidance and COC)S~~I~V~crilicirm throughorrt dl stages of this pmjact. I wwld like to awik Or. Xemphnt08 anâ his cdleagws 1th Oedogical Suwey of Cypnis for pmviding informational field examions Mile in Cyprus. Thanks to Gratuam Borndiile for cdIecüng a pnliminry oriented ample suite duhgthe199;1fidd~ndfahiorui~duingthe1998fiddseaon in cdkdingoww4WrpmpkrrdtJikigrmmmxnfldd~.Iwwld Jsa takm by Pdw Puna. 6.3 AARM Rswlts .......................................94 5.3.1 Sh~peandECCdn~dAARMHIipsoid............ 94 6.4 Summary ........................................... 96 7.1 Bedding. Cbvage and Vwganœ ....................... 97 7.1 .1 Olkntafbn mû Regim8/ DiStn'bmn ................ 97 7.1.2 InteqmtaIr'on ................................. 107 7.2 Anirotropy of Magnetic Susmptibility (AMS) ..............111 7.2.1 AMSFOlhtrOn ................................. 111 7.2.2 AMSUitbn ................................ 115 7.2.3 SummuyofAMSFabtfC ........................ 119 7.3 Anirotropy of Anhystefetic Mignaic Remanence (AARM) .... 120 7.3.1 AARMFdhtbn ................................120 7.3.2 AARMtimm ............................... 124 7.3.3 Summaty of AAR# Fabk ....................... 126 7.4 Chrorolo@opl Intwpmbtim ...........................126 7.5 Summsry .......................................... 131 AppmdixA - Wing and Cieavage Data ..................... 145 AppemdixD . Hystemsis Loop anâ Cmcivity of R~~ Data ... 199 vii Chaptew 1 Fig~f~1-1 TWmic terrains d Cyps ........................ 2 Fig~m1-2 Pal-y at Pmin. friruic transition ........ 3 Figum 1-3 Blodc diagram of Mamociia Temin ................... 4 Figure 14 PaImgqmphy of EPrly and Late Cret~c~ous...... 6 Figure 1-5 Gmesis mcbl f6r ttm Troodos ophidite .............. 7 Figure 1.8 Riâge air and tmnrjami fault evoluüon dduig the fmimof the Traodor ophiolite ................... 9 Figun 1-7 Mi~lrtsrOtaim~l......................... 11 Figure 1-8 Paleomagnotic dds of rotation ..................... 12 F~~UVB1-9 ?ment plate tmtonic Ming of the Eastern Madit- ................................. 16 Figum 1-10 Possible ndum tectonic cidivity .................... 18 ChPptw 2 Figure 2-1 p.c.0. devdopmnt by slip and rotation .............. 23 Figum 2-2 Ddmmation mechanim for a mo~nnimlicrock ..... 25 Figum 23 DefMnation mechmiun plot for quark and calcite ..... 29 Figure 24 Cleavage durification ........................... 32 Figure 2-5 Pure ahem vems simple stiear .................... 40 Figure 26 Flinn diagram ..................................43 chaptcw 3 Figum 3-1 Types of ~katim.......................... 52 Figur~3-2 Jelinek plat .................................... 65 . Chiptrr4 Figun 4-1 Histogmm of wwcivity (HJ .................... 70 Figum 4-2 Daypbtofdib ................................ 71 Figura 4-3 HistoQmnd % .......................... 73 Figure 44 FreqtJemy dktri'kiüari. OfIc,..................... 75 viii Chapter 6 Figure 6-1 AARM directions of samplem expad ................ Figure 6-2 Stemognghic proi#iim of AARM mrub .............. Figure 8-3 Contoumd Jdindc plot d AARM msults compared to AMSmwb ..................................... Chapter 7 Figure 7-1 Regional orientation variation of S. masurements ..... 9û Figm 7-2 Regions1 ori~*mvariation of S,, measurements ..... 99 Figub 7-3 Photognph of runpie FU8284 ................... 100 Figure74 MapdmPjorsüuctumIftusrofCyprus .......... 103 Figwo 7-5 Photograph d rniple FL98û31 ................... 104 Figure 74 Phdo~rsphof umpk FL9B117 ................... 105 Figure 7-7 Photograph of mploFM8167 .................... 06 Figure 78 Variation in cleavage vergema directions ........... 107 Figure 7-9 Sauthwvd bench migration modd ................ 109 Figure 7-1 0 Basin anâ high topognphy mode1 .................. 10 Figure 74 1 Regionsl vdBtiCon d AMS foliation ................. 12 Figure 7-1 2 Regional variation dAMS lineation ................. 13 Figure 7-1 3 Variation in AMS vergerics directions ............... 15 Figure744 Rateofmtfwtvm~eofsubduction ............ 118 Figure 7-1 5 Regional variation d AARM foliation ............... 121 Figure 7-1 6 Regionel vwidion of AARM limation ............... 122 Figure 7-1 7 Vwi*rüon in MRM vefgenœ dimcüons ............. 124 Figure 7-1 0 Schmatic illustration d the AARM composite fPbric ...125 Appndoc B Figue 6-1 Distribution d AMS foliation spatial averaging ........ 189 Figure 6-2 Distribution of AMS limation spatial averaging ....... 190 Appemdix C Figure C-1 Distribution d AARM foliation spatial avmging ...... 197 Figure C-2 Distribution d AARM lineation spatial avemging ...... 198 Chapter 1 - Tectonic Evolution of Cyp~s Located in the eastem Mediterranean Sea, the island of Cypnis contains three tectonic terrains: the Kyrenia Temin, the Mamonia Terrain end th Tdos Terrain (Figure 1-1). The purpose of this chapter is to outline chronologically the events which amalgamated these three Tenains to fom the present geological configuration of Cyprus. Tedonic events which would contribute to the evolution of Cyprus began during the Permian. 1.1 Pemlan The palaeogeography during the Pennian places Gondwanaland to the South and Laurasie to the nom separated by the Paleo-Tethys Seo (Figure 1-2). Shallow water limeStones that aeaimulated on the norVmard dipping continental shelf of Gondwanaland are presently exposed in the eastem parts of the Kymnia Terrains. These limestones fmpart d W KBntara F-on and represent the olded rocks in Cypnrs (Romton and Woodcdc, 1Q86). The transition from the Permien to the Triassic was
Load more

Recommended publications
  • 326-97 Lab Final S.D
    Geol 326-97 Name: KEY 5/6/97 Class Ave = 101 / 150 Geol 326-97 Lab Final s.d. = 24 This lab final exam is worth 150 points of your total grade. Each lettered question is worth 15 points. Read through it all first to find out what you need to do. List all of your answers on these pages and attach any constructions, tracing paper overlays, etc. Put your name on all pages. 1. One way to analyze brittle faults is to calculate and plot the infinitesimal shortening and extension directions on a lower hemisphere, stereographic projection. These principal axes lie in the “movement plane”, which contains the pole to the fault plane and the slickensides, and are at 45° to the pole. The following questions apply to a single fault described in part (a), below: (a) A fault has a strike and dip of 250, 57 N and the slickensides have a rake of 63°, measured from the given strike azimuth. Plot the orientations of the fault plane and the slickensides on an equal area projection. (b) Bedding in the vicinity of the fault is oriented 37, 42 E. Assuming that the fault formed when the bedding was horizontal, determine and plot the original geometry of the fault and the slickensides. (c) Determine the original (pre-rotation)orientation of the infinitesimal shortening and extension axes for fault. 2. All of the following questions apply to the map shown on the next page. In all of the rocks with cleavage, you may assume that both cleavage and bedding strike 024°.
    [Show full text]
  • Geologic Map of the Yellow Pine Quadrangle, Valley County, Idaho
    IDAHO GEOLOGICAL SURVEY IDAHOGEOLOGY.ORG DIGITAL WEB MAP 190 MOSCOW AND BOISE STEWART AND OTHERS present in exposures in the southern part of the map. Quartzite is feldspar The Johnson Creek shear zone is a major regional structure (Lund, 2004). To PIONEER GROUP (CH0776) poor. Thickness unknown because of complex internal folding and the the south of the quadrangle it can be traced as a series of faults (Fisher and 19DS16 GEOLOGIC MAP OF THE YELLOW PINE QUADRANGLE, VALLEY COUNTY, IDAHO The Pioneer group is a prospected area located northeast of the mouth of presence of a foliation that may or may not be transposed bedding. Likely others, 1992; Stewart and others, 2018), none of which appear to be as equivalent to the quartzite and schist unit in the Stibnite roof pendant silicified as in the Yellow Pine area. One splay likely connects to the Dead- Riordan Creek. One Defense Minerals Administration (DMA) application Cambrian y CORRELATION OF MAP UNITS and one Defense Minerals Exploration Administration (DMEA) loan appli- t i mapped by Stewart and others (2016). wood fault, which is locally mineralized at and southwest of the Deadwood l i lower cation were made in the 1950s for claims in this area, details of which are b Mine (Kiilsgaard and others, 2006). To the north, north of the Red Mountain a b Zmsm Marble of Moores Station Formation (Neoproterozoic)—Discontinuous lenses available in Frank (2016). Prospects at slightly lower elevation were termed o qtzite David E. Stewart, Reed S. Lewis, Eric D. Stewart, and Zachery M. Lifton stockwork, the fault zone is intruded by voluminous Eocene dikes (Lund, r p of buff to light-gray marble and lesser amounts of millimeter- to the Syringa Group (DMA Docket 1036).
    [Show full text]
  • Along Strike Variability of Thrust-Fault Vergence
    Brigham Young University BYU ScholarsArchive Theses and Dissertations 2014-06-11 Along Strike Variability of Thrust-Fault Vergence Scott Royal Greenhalgh Brigham Young University - Provo Follow this and additional works at: https://scholarsarchive.byu.edu/etd Part of the Geology Commons BYU ScholarsArchive Citation Greenhalgh, Scott Royal, "Along Strike Variability of Thrust-Fault Vergence" (2014). Theses and Dissertations. 4095. https://scholarsarchive.byu.edu/etd/4095 This Thesis is brought to you for free and open access by BYU ScholarsArchive. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. Along Strike Variability of Thrust-Fault Vergence Scott R. Greenhalgh A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science John H. McBride, Chair Brooks B. Britt Bart J. Kowallis John M. Bartley Department of Geological Sciences Brigham Young University April 2014 Copyright © 2014 Scott R. Greenhalgh All Rights Reserved ABSTRACT Along Strike Variability of Thrust-Fault Vergence Scott R. Greenhalgh Department of Geological Sciences, BYU Master of Science The kinematic evolution and along-strike variation in contractional deformation in over- thrust belts are poorly understood, especially in three dimensions. The Sevier-age Cordilleran overthrust belt of southwestern Wyoming, with its abundance of subsurface data, provides an ideal laboratory to study how this deformation varies along the strike of the belt. We have per- formed a detailed structural interpretation of dual vergent thrusts based on a 3D seismic survey along the Wyoming salient of the Cordilleran overthrust belt (Big Piney-LaBarge field).
    [Show full text]
  • Folds & Folding
    Folds and Folding Earth Structure (2nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben van der Pluijm © WW Norton; unless noted otherwise Folds Maryland Appalachians Swiss Alps 9/18/2010 © EarthStructure (2nd ed) 2 Fold Classification fold shape in profile interlimb angle similar/parallel symmetry/vergence fold size amplitude wavelength fold facing upward/downward fold orientation axis/hinge line axial surface fold in 3D cylindrical/non-cylindrical presence of secondary features foliation lineation DePaor, 2002 9/18/2010 © EarthStructure (2nd ed) 3 Fold terminology 9/18/2010 © EarthStructure (2nd ed) 4 Fold facing (a) upward facing antiform or anticline (b) upward facing synform or syncline (c) downward-facing antiform or antiformal syncline (d) downward-facing synform or synformal anticline (e) profile view; (f) map view 9/18/2010 © EarthStructure (2nd ed) 5 Fold Shape parallel fold similar fold ptygmatic folds 9/18/2010 © EarthStructure (2nd ed) 6 Fold shape a. Parallel fold b. Similar fold t is layer-perpendicular thickness; T is axial trace-parallel thickness 9/18/2010 © EarthStructure (2nd ed) 7 Dip isogons In Class 1A (a) the construction of a single dip isogon is shown, which connects the tangents to upper and lower boundary of folded layer with equal angle (α) relative to a reference frame; dip isogons at 10° intervals are shown for each class. Class 1 folds (a– c) have convergent dip isogon patterns; dip isogons in Class 2 folds (d) are parallel; Class 3 folds (e) have divergent dip isogon patterns. In this classification, parallel (b) and similar (d) folds are labeled as Class 1B and Class 2, respectively.
    [Show full text]
  • Anticline and Adjacent Areas Grand County, Utah
    Please do not destroy or throw away this publication. If you have no further use for it write to the Geological Survey at Washington and ask for a frank to return it UNITED STATES DEPARTMENT OF THE INTERIOR Harold L. Ickes, Secretary GEOLOGICAL, SURVEY W. C. Mendenhall, Director Bulletin 863 GEOLOGY OF THE SALT VALLEY ANTICLINE AND ADJACENT AREAS GRAND COUNTY, UTAH BY C. H. DANE UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1935 For sale by the Superintendent of Documents, Washington, D. C. - - Price $1.00 (Paper cover) CONTENTS Abstract.____________________________________________________ 1 .Introduction____________________________________________ 2 Purpose and scope of the work_____________________________ 2 Field work.____________________________________________________ 4 Acknowledgments....-___--____-___-_--_-______.__________ 5 Topography, drainage, and water supply. ______ 5 Climate_._.__..-.-_--_-______- _ ____ 11 Vegetation. ____________________________ 14 Fuel.._____________________________________ 15 Population, accessibility, routes of travel___--______..________ 15 Previous publications......--.-.-.---.-...__---_-__-___._______ 17 Stratigraphy __ ____.____-__-_---_--____---______--___________.__ 18 Pre-Cambrian complex___---_-_-_-_-_-_-_--__ __--______ 20 Carboniferous system..______--__--_____-_-_-_-_-___-___.______ 24 Pennsylvanian (?) series.__________________________________ 24 Unnamed conglomerate--_______-._____________________ 24 Pennsylvanian series..--____-_-_-_-_-_-______--___.________ 25 Paradox formation.____-_-___---__-_____-__-__-__..__.
    [Show full text]
  • Evolution of the Guerrero Composite Terrane Along the Mexican Margin, from Extensional Fringing Arc to Contractional Continental Arc
    Evolution of the Guerrero composite terrane along the Mexican margin, from extensional fringing arc to contractional continental arc Elena Centeno-García1,†, Cathy Busby2, Michael Busby2, and George Gehrels3 1Instituto de Geología, Universidad Nacional Autónoma de México, Avenida Universidad 3000, Ciudad Universitaria, México D.F. 04510, México 2Department of Geological Sciences, University of California, Santa Barbara, California 93106-9630, USA 3Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA ABSTRACT semblage shows a Callovian–Tithonian (ca. accreted to the edge of the continent during 163–145 Ma) peak in magmatism; extensional contractional or oblique contractional phases The western margin of Mexico is ideally unroofing began in this time frame and con- of subduction. This process can contribute sub- suited for testing two opposing models for tinued into through the next. (3) The Early stantially to the growth of a continent (Collins, the growth of continents along convergent Cretaceous extensional arc assemblage has 2002; Busby, 2004; Centeno-García et al., 2008; margins: accretion of exotic island arcs by two magmatic peaks: one in the Barremian– Collins, 2009). In some cases, renewed upper- the consumption of entire ocean basins ver- Aptian (ca. 129–123 Ma), and the other in the plate extension or oblique extension rifts or sus accretion of fringing terranes produced Albian (ca. 109 Ma). In some localities, rapid slivers these terranes off the continental margin by protracted extensional processes in the subsidence produced thick, mainly shallow- once more, in a kind of “accordion” tectonics upper plate of a single subduction zone. We marine volcano-sedimentary sections, while along the continental margin, referred to by present geologic and detrital zircon evidence at other localities, extensional unroofing of Collins (2002) as tectonic switching.
    [Show full text]
  • Thick-Skinned, South-Verging Backthrusting in the Felch and Calumet Troughs Area of the Penokean Orogen, Northern Michigan
    Thick-Skinned, South-Verging Backthrusting in the Felch and Calumet Troughs Area of the Penokean Orogen, Northern Michigan U.S. GEOLOGICAL SURVEY BULLETIN 1904-L AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions or. ordering publications of the U.S. Geological Survey, along with the last offerings, are given in the current-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Survey publications released prior to the current year are listed in the most recent annual "Price and Availability List" Publications that are listed in various U.S. Geological Survey catalogs (see back inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," updated monthly, which is for sale in microfiche from the USGS ESIC-Open-File Report Sales, Box 25286, Building 810, Denver Federal Center, Denver, CO 80225 Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Tech­ Books of the U.S. Geological Survey are available over the niques of Water-Resources Investigations, Circulars, publications counter at the following U.S. Geological Survey offices, all of of general interest (such as leaflets, pamphlets, booklets), single which are authorized agents of the Superintendent of Documents. copies of periodicals (Earthquakes & Volcanoes, Preliminary De­ termination of Epicenters), and some miscellaneous reports, includ­ ANCHORAGE, Alaska-4230 University Dr., Rm.
    [Show full text]
  • Parasitic Folds with Wrong Vergence: How Pre-Existing Geometrical Asymmetries Can Be Inherited During Multilayer Buckle Folding
    Journal of Structural Geology 87 (2016) 19e29 Contents lists available at ScienceDirect Journal of Structural Geology journal homepage: www.elsevier.com/locate/jsg Parasitic folds with wrong vergence: How pre-existing geometrical asymmetries can be inherited during multilayer buckle folding * Marcel Frehner , Timothy Schmid Geological Institute, ETH Zurich, Switzerland article info abstract Article history: Parasitic folds are typical structures in geological multilayer folds; they are characterized by a small Received 20 October 2015 wavelength and are situated within folds with larger wavelength. Parasitic folds exhibit a characteristic Received in revised form asymmetry (or vergence) reflecting their structural relationship to the larger-scale fold. Here we 2 March 2016 investigate if a pre-existing geometrical asymmetry (e.g., from sedimentary structures or folds from a Accepted 5 April 2016 previous tectonic event) can be inherited during buckle folding to form parasitic folds with wrong Available online 9 April 2016 vergence. We conduct 2D finite-element simulations of multilayer folding using Newtonian materials. The applied model setup comprises a thin layer exhibiting the pre-existing geometrical asymmetry Keywords: Parasitic folds sandwiched between two thicker layers, all intercalated with a lower-viscosity matrix and subjected to Buckle folds layer-parallel shortening. When the two outer thick layers buckle and amplify, two processes work Fold vergence against the asymmetry: layer-perpendicular flattening between the two thick layers and the rotational Asymmetric folds component of flexural flow folding. Both processes promote de-amplification and unfolding of the pre- Structural inheritance existing asymmetry. We discuss how the efficiency of de-amplification is controlled by the larger-scale Finite-element method fold amplification and conclude that pre-existing asymmetries that are open and/or exhibit low amplitude are prone to de-amplification and may disappear during buckling of the multilayer system.
    [Show full text]
  • Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton
    minerals Article Geodynamic Emplacement Setting of Late Jurassic Dikes of the Yana–Kolyma Gold Belt, NE Folded Framing of the Siberian Craton: Geochemical, Petrologic, and U–Pb Zircon Data Valery Yu. Fridovsky 1,*, Kyunney Yu. Yakovleva 1, Antonina E. Vernikovskaya 1,2,3, Valery A. Vernikovsky 2,3 , Nikolay Yu. Matushkin 2,3 , Pavel I. Kadilnikov 2,3 and Nickolay V. Rodionov 1,4 1 Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, 677000 Yakutsk, Russia; [email protected] (K.Y.Y.); [email protected] (A.E.V.); [email protected] (N.V.R.) 2 A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia; [email protected] (V.A.V.); [email protected] (N.Y.M.); [email protected] (P.I.K.) 3 Department of Geology and Geophysics, Novosibirsk State University, 630090 Novosibirsk, Russia 4 A.P. Karpinsky Russian Geological Research Institute, 199106 St. Petersburg, Russia * Correspondence: [email protected]; Tel.: +7-4112-33-58-72 Received: 30 September 2020; Accepted: 8 November 2020; Published: 11 November 2020 Abstract: We present the results of geostructural, mineralogic–petrographic, geochemical, and U–Pb geochronological investigations of mafic, intermediate, and felsic igneous rocks from dikes in the Yana–Kolyma gold belt of the Verkhoyansk–Kolyma folded area (northeastern Asia). The dikes of the Vyun deposit and the Shumniy occurrence intruding Mesozoic terrigenous rocks of the Kular–Nera and Polousniy–Debin terranes were examined in detail. The dikes had diverse mineralogical and petrographic compositions including trachybasalts, andesites, trachyandesites, dacites, and granodiorites.
    [Show full text]
  • The Structural Geometry of Detachment Folds Above a Duplex in the Franklin Mountains, Northeastern Brooks Range, Alaska
    June 7, 1994 Price: $21.40 Division of Geological & Geophysical Surveys PUBLIC-DATA FILE 94-43 THE STRUCTURAL GEOMETRY OF DETACHMENT FOLDS ABOVE A DUPLEX IN THE FRANKLIN MOUNTAINS, NORTHEASTERN BROOKS RANGE, ALASKA Thomas X. Homza Brooks Range Geological Research Group Tectonics and Sedimentation Research Group Department of Geology and Geophysics Geophysical Institute University of Alaska Fairbanks June 1994 THIS REPORT HAS NOT BEEN REVIEWED FOR TECHNICAL CONTENT (EXCEPT AS NOTED IN TEXT) OR FOR CONFORMITY TO THE EDITORIAL STANDARDS OF DGGS. Released by STATE OF ALASKA DEPARTMENTOFNATURALRESOURCES Division of Geological & Geophysical Surveys 794 University Avenue, Suite 200 Fairbanks, Alaska 99709-3645 ABSTRACT Geometric and kinematic analyses conducted in the northeastern Brooks Range constrain the evolution of a detachment folded roof sequence above a regional duplex . At least some of the detachment folds formed by fixed arc- length kinematics above a detachment unit that changed thickness during deformation and served as the roof thrust of the duplex. The horses in the duplex - -- are fault-bend folds with gently dipping limbs and 'sub-horizontal crestal panels and detachment fold-trains occur above bends in the fault-bend folds and are separated by straight panels in the roof sequence. Detachment folds above the gently dipping backlimbs of the horses are north-vergent, whereas those above the forelimbs are both north- and south-vergent. Folds above the crestal panels / are largely symmetric and those above the synform that separates the fault-bend folds are highly north-vergent and truncated by thrust faults. This distribution of detachment fold asymmetries suggests a complex structural history involving both forward and hindward displacements and it suggests a kinematic relationship between the fault-bend folded horses and the detachment folded roof sequence.
    [Show full text]
  • Journal of Mechanics of Materials and Structures Vol 1 Issue 2, Feb 2006
    JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES Journal of Mechanics of Materials and Structures Volume 1 No. 2 February 2006 Journal of Mechanics of Materials and Structures 2006 Vol. 1, No. 2 Volume 1, Nº 2 February 2006 mathematical sciences publishers JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES http://www.jomms.org EDITOR-IN-CHIEF Charles R. Steele ASSOCIATE EDITOR Marie-Louise Steele Division of Mechanics and Computation Stanford University Stanford, CA 94305 USA SENIOR CONSULTING EDITOR Georg Herrmann Ortstrasse 7 CH–7270 Davos Platz Switzerland BOARD OF EDITORS D. BIGONI University of Trento, Italy H. D. BUI Ecole´ Polytechnique, France J. P. CARTER University of Sydney, Australia R. M. CHRISTENSEN Stanford University, U.S.A. G. M. L. GLADWELL University of Waterloo, Canada D. H. HODGES Georgia Institute of Technology, U.S.A. J. HUTCHINSON Harvard University, U.S.A. C. HWU National Cheng Kung University, R.O. China IWONA JASIUK University of Illinois at Urbana-Champaign B. L. KARIHALOO University of Wales, U.K. Y. Y. KIM Seoul National University, Republic of Korea Z. MROZ Academy of Science, Poland D. PAMPLONA Universidade Catolica´ do Rio de Janeiro, Brazil M. B. RUBIN Technion, Haifa, Israel Y. SHINDO Tohoku University, Japan A. N. SHUPIKOV Ukrainian Academy of Sciences, Ukraine T. TARNAI University Budapest, Hungary F. Y. M. WAN University of California, Irvine, U.S.A. P. WRIGGERS Universitat¨ Hannover, Germany W. YANG Tsinghua University, P.R. China F. ZIEGLER Tech Universitat¨ Wien, Austria PRODUCTION PAULO NEY DE SOUZA Production Manager SILVIO LEVY Senior Production Editor NICHOLAS JACKSON Production Editor ©Copyright 2007.
    [Show full text]
  • Small-Scale Structures in the Guadalupe Mountains Region: Implication for Laramide Stress Trends in the Permian Basin Erdlac, Richard J., Jr., 1993, Pp
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/44 Small-scale structures in the Guadalupe Mountains region: Implication for Laramide stress trends in the Permian Basin Erdlac, Richard J., Jr., 1993, pp. 167-174 in: Carlsbad Region (New Mexico and West Texas), Love, D. W.; Hawley, J. W.; Kues, B. S.; Austin, G. S.; Lucas, S. G.; [eds.], New Mexico Geological Society 44th Annual Fall Field Conference Guidebook, 357 p. This is one of many related papers that were included in the 1993 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks.
    [Show full text]