Results 11 to 20 of about 114 (105)

MELTING OF ACCRETIONARY WEDGE AND BUILDING MATURE CONTINENTAL CRUST: INSIGHTS FROM THE MAGMATIC EVOLUTION OF THE CHINESE ALTAI OROGEN, CENTRAL ASIA

Геодинамика и тектонофизика, 2017
Tectonic-magmatic reworking of accretionary wedges is a key process responsible for differentiation and stabilization of continental crustal in accretionary orogens. This generic problem can be exemplified by magmatic evolution of the Chinese Altai which
Yingde Jiang, Karel Schulmann, Min Sun, Pavla Štípská, Alexandra Guy, Ondrej Lexa, Vojetch Janoušek, Chao Yuan   +7 more
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Extreme extension across Seram and Ambon, eastern Indonesia: evidence for Banda slab rollback [PDF]

Solid Earth, 2013
The island of Seram, which lies in the northern part of the 180°-curved Banda Arc, has previously been interpreted as a fold-and-thrust belt formed during arc-continent collision, which incorporates ophiolites intruded by granites thought to have been ...
J. M. Pownall, R. Hall, I. M. Watkinson
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Petrogenesis and tectonic implications of the late Paleoproterozoic (ca. 1.7 Ga) post-collisional magmatism in the southwestern Gyeonggi Massif at Garorim Bay, South Korea

Journal of Asian Earth Sciences: X, 2021
The Precambrian basement of the Gyeonggi Massif in the central Korean Peninsula consists mainly of Paleoproterozoic (2.0–1.8 Ga) gneisses. In this study, we present petrological, zircon U–Pb age and Hf isotope, and whole-rock geochemical and Sr–Nd–Pb ...
Ji-In Kim, Sung Hi Choi
doaj   +1 more source

A new understanding of Demala Group complex in Chayu Area, southeastern Qinghai-Tibet Plateau: Evidence from zircon U-Pb and mica 40Ar/39Ar dating

China Geology, 2021
: The Chayu area is located at the southeastern margin of the Qinghai-Tibet Plateau. This region was considered to be in the southeastward extension of the Lhasa Block, bounded by Nujiang suture zone in the north and Yarlung Zangbo suture zone in the ...
Yuan Tang, Yu-ping Liu, Peng Wang, Wen-qing Tang, Ya-dong Qin, Xiao-dong Gong, Dong-bing Wang, Bao-di Wang   +7 more
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Boron and Molybdenum Isotope Evidence for Source‐Controlled Compositional Diversity of Cenozoic Granites in the Eastern Tethyan Himalaya

Geochemistry, Geophysics, Geosystems, 2023
The origins of Cenozoic granites in the Himalaya are key to understanding the evolution of the Himalayan orogen. However, it is unclear whether these granites represent primary melts, and the nature of their magma source is controversial.
Jing‐Jing Fan, Qiang Wang, Gang‐Jian Wei, Jie Li, Lin Ma, Xiu‐Zheng Zhang, Zi‐Qi Jiang, Jin‐Long Ma, Jin‐Sheng Zhou, Qi‐Wei Li, Zi‐Long Wang, Xiao Liu, Tong‐Yu Huang, Miao‐Yan Zhang   +13 more
doaj   +1 more source

Disequilibrium melting during crustal anatexis and implications for modeling open magmatic systems [PDF]

Geology, 2012
Contamination of ascending mantle-derived magmas by the continental crust was investigated and modeled for a suite of volcanic rocks and entrained crustal xenoliths from the Central Andes using bulk geochemical compositions for mantle-derived and crustal end-members as dictated by traditional approaches.
McLeod, C.L., Davidson, J.P., Nowell, G.M., de Silva, S.L.   +3 more
openaire   +2 more sources

Contribution of crustal anatexis to the tectonic evolution of Indian crust beneath southern Tibet [PDF]

Geological Society of America Bulletin, 2010
This geochemical, geochronological and structural study of intrusive rocks in the Sakya Dome of southern Tibet has identified two distinct suites of anatectic granites that carry contrasting implications for the tectonic evolution of the India-Asia collision zone.
King, Jess, Harris, Nigel, Argles, Tom, Parrish, Randall, Zhang, Hongfei   +4 more
openaire   +4 more sources

Paleoproterozoic crustal evolution and Mesoproterozoic overprint in the Roosevelt-Guariba Transpressive Belt, Juruena Terrain, Southeastern Amazonas, Brazil

Journal of the Geological Survey of Brazil, 2022
The Juruena Terrain (Rondônia-Juruena Province) in the southeastern Amazonas State shows a NW-SE dextral shear zones system denominated Roosevelt-Guariba Transpressive Belt (RGTB). The RGTB was generated in response to intracontinental crustal reworking,
Marcelo Esteves Almeida, Antônio Charles da Slva Oliveira, João Orestes Schneider dos Santos, Gilles Ruffet, Joseneusa Brilhante Rodrigues   +4 more
doaj   +1 more source

Oxygen isotope shifts reveal fluid-fluxed melting in continental anatexis

Communications Earth & Environment
Fluid-flux melting is increasingly recognised as a key mechanism for continental crust growth and recycling, but the abundance and sources of the external fluids involved in this process are typically uncertain.
Silvia Volante, Amaury Pourteau, Zheng-Xiang Li, William J. Collins, Luc S. Doucet, Hugo K. H. Olierook, Laure Martin, Matthijs A. Smit   +7 more
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Geochemical characteristics of apatite in metabasic rocks under different metamorphic conditions: a case study from the Paleoproterozoic Trans-North China Orogen

Dizhi lixue xuebao
Objective  Apatite is a common accessory mineral that is widely distributed in various rock types. Its U-Pb age, trace elements (particularly REE, Th, U, and Sr), and Sr-Nd isotopic compositions provide important information on its chronology and ...
YANG Yuqing, GAO Peng, ZHANG Jian, LIU Xiaoguang, CHENG Changquan, YIN Changqing, QIAN Jiahui   +6 more
doaj   +1 more source