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Titolo:
The Yarlung-Zangbo paleo-ophiolite, southern Tibet: implications for the dynamic evolution of the Yarlung-Zangbo Suture Zone
Autore:
Wang, CS; Liu, ZF; Hebert, R;
Indirizzi:
Chengdu Univ Technol, Inst Sedimentary Geol, Chengdu 610059, Peoples R China Chengdu Univ Technol Chengdu Peoples R China 610059 059, Peoples R China Tongji Univ, Lab Marine Geol, Shanghai 200092, Peoples R China Tongji Univ Shanghai Peoples R China 200092 ghai 200092, Peoples R China Univ Laval, Dept Geol & Genie Geol, St Foy, PQ G1K 7P4, Canada Univ LavalSt Foy PQ Canada G1K 7P4 enie Geol, St Foy, PQ G1K 7P4, Canada
Titolo Testata:
JOURNAL OF ASIAN EARTH SCIENCES
fascicolo: 6, volume: 18, anno: 2000,
pagine: 651 - 661
SICI:
1367-9120(200012)18:6<651:TYPSTI>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
FORE-ARC BASIN; XIGAZE OPHIOLITE; COLLISION; CHINA; INDIA; ASIA; DEFORMATION; TECTONICS; ROCKS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Liu, ZF Chengdu Univ Technol, Inst Sedimentary Geol, Chengdu 610059, Peoples R China Chengdu Univ Technol Chengdu Peoples R China 610059 ples R China
Citazione:
C.S. Wang et al., "The Yarlung-Zangbo paleo-ophiolite, southern Tibet: implications for the dynamic evolution of the Yarlung-Zangbo Suture Zone", J ASIAN E S, 18(6), 2000, pp. 651-661

Abstract

The Yarlung-Zangbo Suture Zone, a major geological structure in Tibet, is well known as the locus of tectonic emplacement of the Tethyan ophiolites. Current models propose that most of the East Tethyan oceanic lithosphere was subducted within a single subduction zone, active during the Middle or Late Cretaceous, which was completed during the Paleogene collision between India and Asia. The Early Cretaceous sedimentary Giabulin Formation in southern Tibet, includes conglomeratic members that contain ultramafic and maficplutonic pebbles, as well as radiolarian chert clasts, that record the erosion of oceanic lithosphere involved in a subduction event which occurred earlier than previously believed. Geochemical analyses, mineral chemistry, stratigraphic chronology, and sedimentary analysis, including source provenance, suggest that the pebbly conglomerate was formed through erosion of an unknown ophiolitic source that was geochemically distinguishable from the Xigaze ophiolites within the Yarlung-Zangbo Suture Zone, southern Tibet. We infer the existence of an older ophiolitic source, termed the Yarlung-Zangbo paleo-ophiolite, that was dismembered and eroded during an earlier subduction stage not taken into account in current models. (C) 2000 Elsevier Science Ltd. All rights reserved.

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Documento generato il 19/07/18 alle ore 13:39:29