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And Ordovician (Sardic) Felsic Magmatic Events in South-Western Europe: Underplating of Hot Mafic Magmas Linked to the Opening of the Rheic Ocean
Solid Earth, 11, 2377–2409, 2020 https://doi.org/10.5194/se-11-2377-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Comparative geochemical study on Furongian–earliest Ordovician (Toledanian) and Ordovician (Sardic) felsic magmatic events in south-western Europe: underplating of hot mafic magmas linked to the opening of the Rheic Ocean J. Javier Álvaro1, Teresa Sánchez-García2, Claudia Puddu3, Josep Maria Casas4, Alejandro Díez-Montes5, Montserrat Liesa6, and Giacomo Oggiano7 1Instituto de Geociencias (CSIC-UCM), Dr. Severo Ochoa 7, 28040 Madrid, Spain 2Instituto Geológico y Minero de España, Ríos Rosas 23, 28003 Madrid, Spain 3Dpt. Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain 4Dpt. de Dinàmica de la Terra i de l’Oceà, Universitat de Barcelona, Martí Franquès s/n, 08028 Barcelona, Spain 5Instituto Geológico y Minero de España, Plaza de la Constitución 1, 37001 Salamanca, Spain 6Dpt. de Mineralogia, Petrologia i Geologia aplicada, Universitat de Barcelona, Martí Franquès s/n, 08028 Barcelona, Spain 7Dipartimento di Scienze della Natura e del Territorio, 07100 Sassari, Italy Correspondence: J. Javier Álvaro ([email protected]) Received: 1 April 2020 – Discussion started: 20 April 2020 Revised: 14 October 2020 – Accepted: 19 October 2020 – Published: 11 December 2020 Abstract. A geochemical comparison of early Palaeo- neither metamorphism nor penetrative deformation; on the zoic felsic magmatic episodes throughout the south- contrary, their unconformities are associated with foliation- western European margin of Gondwana is made and in- free open folds subsequently affected by the Variscan defor- cludes (i) Furongian–Early Ordovician (Toledanian) activ- mation. -
Data Structure
Data structure – Water The aim of this document is to provide a short and clear description of parameters (data items) that are to be reported in the data collection forms of the Global Monitoring Plan (GMP) data collection campaigns 2013–2014. The data itself should be reported by means of MS Excel sheets as suggested in the document UNEP/POPS/COP.6/INF/31, chapter 2.3, p. 22. Aggregated data can also be reported via on-line forms available in the GMP data warehouse (GMP DWH). Structure of the database and associated code lists are based on following documents, recommendations and expert opinions as adopted by the Stockholm Convention COP6 in 2013: · Guidance on the Global Monitoring Plan for Persistent Organic Pollutants UNEP/POPS/COP.6/INF/31 (version January 2013) · Conclusions of the Meeting of the Global Coordination Group and Regional Organization Groups for the Global Monitoring Plan for POPs, held in Geneva, 10–12 October 2012 · Conclusions of the Meeting of the expert group on data handling under the global monitoring plan for persistent organic pollutants, held in Brno, Czech Republic, 13-15 June 2012 The individual reported data component is inserted as: · free text or number (e.g. Site name, Monitoring programme, Value) · a defined item selected from a particular code list (e.g., Country, Chemical – group, Sampling). All code lists (i.e., allowed values for individual parameters) are enclosed in this document, either in a particular section (e.g., Region, Method) or listed separately in the annexes below (Country, Chemical – group, Parameter) for your reference. -
The Mediterranean Region—A Geological Primer
160 Article by William Cavazza1 and Forese Carlo Wezel2 The Mediterranean region—a geological primer 1 Dept. of Earth and Geoenvironmental Sciences, Univ. of Bologna, Italy. [email protected] 2 Institute of Environmental Dynamics, University of Urbino, Italy. [email protected] The last twenty-five years of geological investigation of the Mediterranean region have disproved the traditional Introduction notion that the Alpine-Himalayan mountain ranges Many important ideas and influential geological models have been originated from the closure of a single, albeit complex, developed based on research undertaken in the Mediterranean oceanic domain—the Tethys. Instead, the present-day region. For example, the Alps are the most studied orogen in the geological configuration of the Mediterranean region is world, their structure has been elucidated in great detail for the most part and has served as an orogenic model applied to other collisional the result of the creation and ensuing consumption of orogens. Ophiolites and olistostromes were defined and studied for two major oceanic basins—the Paleotethys and the the first time in this region. The Mediterranean Sea has possibly the Neotethys—and of additional smaller oceanic basins highest density of DSDP/ODP sites in the world, and extensive within an overall regime of prolonged interaction research on its Messinian deposits and on their on-land counterparts has provided a spectacular example for the generation of widespread between the Eurasian and the African-Arabian plates. basinal evaporites. Other portions of this region are less well under- In greater detail, there is still some debate about exactly stood and are now the focus of much international attention. -
Iberian Plate-Kinematics in Paleomagnetic and Mantle Reference Frames, Gondwana Research (2016), Doi: 10.1016/J.Gr.2016.03.006
ÔØ ÅÒÙ×Ö ÔØ Cretaceous slab break-off in the Pyrenees: Iberian plate-kinematics in paleo- magnetic and mantle reference frames Reinoud L.M. Vissers, Douwe J.J. van Hinsbergen, Douwe G. van der Meer, Wim Spakman PII: S1342-937X(16)30053-3 DOI: doi: 10.1016/j.gr.2016.03.006 Reference: GR 1599 To appear in: Gondwana Research Received date: 21 September 2015 Revised date: 2 March 2016 Accepted date: 3 March 2016 Please cite this article as: Vissers, Reinoud L.M., van Hinsbergen, Douwe J.J., van der Meer, Douwe G., Spakman, Wim, Cretaceous slab break-off in the Pyrenees: Iberian plate-kinematics in paleomagnetic and mantle reference frames, Gondwana Research (2016), doi: 10.1016/j.gr.2016.03.006 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPT Cretaceous slab break-off in the Pyrenees: Iberian plate- kinematics in paleomagnetic and mantle reference frames Reinoud L.M. Vissers1, Douwe J.J. van Hinsbergen1, Douwe G. van der Meer1,2, Wim Spakman1,3 1 Department of Earth Sciences, Utrecht University, Budapestlaan 4, Utrecht 3584 CD, Netherlands 2 Nexen Petroleum UK Ltd, 97 Oxford Road, Uxbridge, Middlesex UB8 1LU, UK 3 Center for Earth Evolution and Dynamics (CEED), University of Oslo, Sem Saelands vei 24, NO-0316 Oslo, Norway corresponding author: Reinoud L.M. -
Readingsample
The TRANSMED Atlas. The Mediterranean Region from Crust to Mantle Geological and Geophysical Framework of the Mediterranean and the Surrounding Areas Bearbeitet von William Cavazza, François M. Roure, Wim Spakman, Gerard M. Stampfli, Peter A. Ziegler 1. Auflage 2004. Buch. xxiii, 141 S. ISBN 978 3 540 22181 4 Format (B x L): 19,3 x 27 cm Gewicht: 660 g Weitere Fachgebiete > Physik, Astronomie > Angewandte Physik > Geophysik Zu Inhaltsverzeichnis schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, eBooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte. Chapter 1 The Mediterranean Area and the Surrounding Regions: Active Processes, Remnants of Former Tethyan Oceans and Related Thrust Belts William Cavazza · François Roure · Peter A. Ziegler Abstract 1.1 Introduction The Mediterranean domain provides a present-day geo- From the pioneering studies of Marsili – who singlehand- dynamic analog for the final stages of a continent-conti- edly founded the field of oceanography with the publi- nent collisional orogeny. Over this area, oceanic lithos- cation in 1725 of the Histoire physique de la mer, a scien- pheric domains originally present between the Eurasian tific best-seller of the time (Sartori 2003) – to the tech- and African-Arabian plates have been subducted and par- nologically most advanced cruises of the R/V JOIDES tially obducted, except for the Ionian basin and the south- Resolution, the Mediterranean Sea has represented a cru- eastern Mediterranean. -
1. the Western Iberia Margin: a Geophysical and Geological Overview1
Whitmarsh, R.B., Sawyer, D.S., Klaus, A., and Masson, D.G. (Eds.), 1996 Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 149 1. THE WESTERN IBERIA MARGIN: A GEOPHYSICAL AND GEOLOGICAL OVERVIEW1 L.M. Pinheiro,2 R.C.L. Wilson,3 R. Pena dos Reis,4 R.B. Whitmarsh,5 A. Ribeiro6 ABSTRACT This paper presents a general overview of the geology and geophysics of western Iberia, and in particular of the western Portuguese Margin. The links between the onshore and offshore geology and geophysics are especially emphasized. The west Iberia Margin is an example of a nonvolcanic rifted margin. The Variscan basement exposed on land in Iberia exhibits strike- slip faults and other structural trends, which had an important effect on the development, in time and space, of subsequent rift- ing of the continental margin and even perhaps influences the present-day offshore seismicity. The margin has had a long tec- tonic and magmatic history from the Late Triassic until the present day. Rifting first began in the Late Triassic; after about 70 Ma, continental separation began in the Tagus Abyssal Plain. Continental breakup then appears to have progressively migrated northwards, eventually reaching the Galicia Bank segment of the margin about 112 Ma. Although there is onshore evidence of magmatism throughout the period from the Late Triassic until 130 Ma and even later, this was sporadic and of insignificant vol- ume. Important onshore rift basins were formed during this period. Offshore, the record is complex and fragmentary. An ocean/ continent transition, over 150 km wide, lies beyond the shelf edge and is marked on its western side by a peridotite ridge and thin oceanic crust characterized by seafloor spreading anomalies. -
Geology of the Connaigre Peninsula and Adjacent
10′ 55° 00′ LEGEND 32 MIDDLE PALEOZOIC LATE NEOPROTEROZOIC 42 42 DEVONIAN LONG HARBOUR GROUP (Units 16 to 24) 86 Mo BELLEORAM GRANITE Rencontre Formation (Units 19 to 24) 47° 50′ 32 47 Grey to pink, medium- and fine-grained equigranular granite containing many small, dark-grey and green (Units 19 and 20 occur only in the northern Fortune Bay 47a to black inclusions; 47a red felsite and fine-grained area; Unit 22 occurs only on Brunette Island) 47b granite, developed locally at pluton’s margin; 47b Red micaceous siltstone and interbedded, buff-weath- 10 pink-to brown quartz-feldspar porphyry (Red Head 24 31 Porphyry) ering, quartzitic arkose and pebble conglomerate 20′ Pink, buff-weathering, medium- to coarse-grained, Be88 OLD WOMAN STOCK 23 cross-bedded, quartzitic arkose and granule to pebble Pink, medium- and coarse-grained, porphyritic biotite 42 46 23a conglomerate; locally contains red siltstone; 23a red 32 granite; minor aplite 31 23b pebble conglomerate; 23b quartzitic arkose as in 23, MAP 98-02 GREAT BAY DE L’EAU FORMATION (Units 44 and 45) containing minor amounts of red siltstone 37 9 83 Pyr 45 Grey mafic sills and flows 22 Red and grey, thin-bedded siltstone, and fine-grained 37 GEOLOGY OF THE CONNAIGRE PENINSULA 19b sandstone and interbedded buff, coarse-grained, cross 10 25 19b Pyr 81 Red, purple and buff, pebble to boulder conglomerate; bedded quartzitic arkose; minor bright-red shale and 32 25 42 44 W,Sn 91 minor green conglomerate and red and blackshale; green-grey and black-grey and black siltstone AND ADJACENT AREAS, -
“Modern-Type Plate Tectonics”?
SILEIR RA A D B E E G D E A O D L Special Session, “A tribute to Edilton Santos, a leader in Precambrian O E I G C I A Geology in Northeastern Brazil”, edited by A.N. Sial and V.P. Ferreira O BJGEO S DOI: 10.1590/2317-4889202020190095 Brazilian Journal of Geology D ESDE 1946 Dawn of metazoans: to what extent was this influenced by the onset of “modern-type plate tectonics”? Umberto G. Cordani1* , Thomas R. Fairchild1 , Carlos E. Ganade1 , Marly Babinski1 , Juliana de Moraes Leme1 Abstract The appearance of complex megascopic multicellular eukaryotes in the Ediacaran occurred just when the dynamics of a cooling Earth allowed establishment of a new style of global tectonics that continues to the present as “modern-type plate tectonics”. The advent of this style was first registered in 620 Ma-old coesite-bearing Ultra-High Pressure eclogites within the Transbrasiliano-Kandi mega-shear zone along the site of the West Gondwana Orogeny (WGO). These eclogites comprise the oldest evidence of slab-pull deep subduction capable of inducing con- tinental collisions and producing high-relief Himalayan-type mega-mountains. Life, prior to this time, was essentially microscopic. Yet with increasing Neoproterozoic oxygenation and intensified influx of nutrients to Ediacaran oceans, resulting from the erosion of these mountains, complex macroscopic heterotrophic eukaryotes arose and diversified, taking the biosphere to a new evolutionary threshold. The repeated elevation of Himalayan-type mega-mountains ever since then has continued to play a fundamental role in nutrient supply and biosphere evolution. Other authors have alluded to the influence of Gondwana mountain-building upon Ediacaran evolution, however we claim here to have identified when and where it began. -
The Phanerozoic Thermo-Tectonic Evolution of Northern Mozambique Constrained by Ar, Fission Track and (U-Th)/He Analyses
THE PHANEROZOIC THERMO-TECTONIC EVOLUTION OF NORTHERN MOZAMBIQUE 40 39 CONSTRAINED BY AR/ AR, FISSION TRACK AND (U-TH)/HE ANALYSES Dissertation zur Erlangung des Doktorgrades der Naturwissenschaften am Fachbereich Geowissenschaften der Universität Bremen Vorgelegt von Matthias Ch. Daßinnies Bremen, 2006 Tag des Kolloquiums: 22.12.2006 Gutachter: Prof. Dr. J. Jacobs Prof. Dr. W. Bach Prüfer: Prof. Dr. T. Mörz Prof. A. Kopf Contents CONTENTS ACKNOWLEDGEMENTS ...................................................................................................... v SUMMARY........................................................................................................................ vii ZUSAMMENFASSUNG ......................................................................................................... x CHAPTER 1 INTRODUCTION .................................................................................................................. 1 1.1 Scope of thesis.................................................................................................. 1 1.2 Research objectives and methods..................................................................... 3 1.3 Outline of thesis ............................................................................................... 4 CHAPTER 2 THERMOCHRONOLOGICAL METHODS AND ANALYTICS ...................................................... 6 2.1 40Ar/39Ar dating method................................................................................... 6 2.1.1 Argon isotope measurements -
1 Influence of Sea Ice Anomalies on Antarctic Precipitation Using
https://doi.org/10.5194/tc-2019-69 Preprint. Discussion started: 12 June 2019 c Author(s) 2019. CC BY 4.0 License. Influence of Sea Ice Anomalies on Antarctic Precipitation Using Source Attribution Hailong Wang1*, Jeremy Fyke2,3, Jan Lenaerts4, Jesse Nusbaumer5,6, Hansi Singh1, David Noone7, and Philip Rasch1 (1) Pacific Northwest National Laboratory, Richland, WA 5 (2) Los Alamos National Laboratory, Los Alamos, NM (3) Associated Engineering, Vernon, British Columbia, Canada (4) Department of Atmospheric and Oceanic Sciences, University of Colorado at Boulder, Boulder, CO (5) NASA Goddard Institute for Space Studies, New York, NY (6) Center for Climate Systems Research, Columbia University, New York, NY 10 (7) Oregon State University, Corvallis, OR *Correspondence to: [email protected] 1 https://doi.org/10.5194/tc-2019-69 Preprint. Discussion started: 12 June 2019 c Author(s) 2019. CC BY 4.0 License. Abstract We conduct sensitivity experiments using a climate model that has an explicit water source tagging capability forced by prescribed composites of sea ice concentrations (SIC) and corresponding SSTs to understand the impact of sea ice anomalies on regional evaporation, moisture transport, and source– 5 receptor relationships for precipitation over Antarctica. Surface sensible heat fluxes, evaporation, and column-integrated water vapor are larger over Southern Ocean (SO) areas with lower SIC, but changes in Antarctic precipitation and its source attribution with SICs reflect a strong spatial variability. Among the tagged source regions, the Southern Ocean (south of 50°S) contributes the most (40%) to the Antarctic total precipitation, followed by more northerly ocean basins, most notably the S. -
A Review of the Neoproterozoic to Cambrian Tectonic Evolution
Accepted Manuscript Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution H. Fritz, M. Abdelsalam, K.A. Ali, B. Bingen, A.S. Collins, A.R. Fowler, W. Ghebreab, C.A. Hauzenberger, P.R. Johnson, T.M. Kusky, P. Macey, S. Muhongo, R.J. Stern, G. Viola PII: S1464-343X(13)00104-0 DOI: http://dx.doi.org/10.1016/j.jafrearsci.2013.06.004 Reference: AES 1867 To appear in: African Earth Sciences Received Date: 8 May 2012 Revised Date: 16 June 2013 Accepted Date: 21 June 2013 Please cite this article as: Fritz, H., Abdelsalam, M., Ali, K.A., Bingen, B., Collins, A.S., Fowler, A.R., Ghebreab, W., Hauzenberger, C.A., Johnson, P.R., Kusky, T.M., Macey, P., Muhongo, S., Stern, R.J., Viola, G., Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian tectonic evolution, African Earth Sciences (2013), doi: http://dx.doi.org/10.1016/j.jafrearsci.2013.06.004 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 1 Orogen styles in the East African Orogen: A review of the Neoproterozoic to Cambrian 2 tectonic evolution 3 H. -
Retallack 2014 Newfoundland Ediacaran
Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Geological Society of America Bulletin Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J. Retallack Geological Society of America Bulletin 2014;126, no. 5-6;619-638 doi: 10.1130/B30892.1 Email alerting services click www.gsapubs.org/cgi/alerts to receive free e-mail alerts when new articles cite this article Subscribe click www.gsapubs.org/subscriptions/ to subscribe to Geological Society of America Bulletin Permission request click http://www.geosociety.org/pubs/copyrt.htm#gsa to contact GSA Copyright not claimed on content prepared wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms to further education and science. This file may not be posted to any Web site, but authors may post the abstracts only of their articles on their own or their organization's Web site providing the posting includes a reference to the article's full citation. GSA provides this and other forums for the presentation of diverse opinions and positions by scientists worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society. Notes © 2014 Geological Society of America Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J.