Mesozoic and Cenozoic tectonic evolution of the Shiquanhe area of western Tibet
文献类型：期刊论文
| 作者 | Kapp, P; Murphy, MA; Yin, A; Harrison, TM; Ding, L; Guo, JH |
| 刊名 | TECTONICS
 |
| 出版日期 | 2003-07-09 |
| 卷号 | 22期号:4 |
| 关键词 | Tibet Bangong suture melange obduction underthrusting plateau formation |
| ISSN号 | 0278-7407 |
| DOI | 10.1029/2001TC001332 |
| 文献子类 | Article |
| 英文摘要 | In the Shiquanhe area of far-western Tibet, mid-Cretaceous strata lie unconformable on ophiolitic melange and Jurassic flysch associated with the Bangong-Nujiang suture zone. On the basis of our mapping and geochronologic studies, we suggest that these Cretaceous strata were shortened by >57% over a north south distance of 50 km during Late Cretaceous-early Tertiary time. The Late Cretaceous Narangjiapo thrust placed Permian strata >20 km over ophiolitic melange and Cretaceous strata. North of the Narangjiapo thrust, >40 km of shortening was accommodated by the Late Cretaceous-early Tertiary south directed Jaggang thrust system that involves Jurassic flysch and Cretaceous strata, and roots into a decollement within ophiolitic melange. The most recent shortening was accommodated to the south of the Narangjiapo thrust, along the north dipping Shiquanhe thrust. The Shiquanhe thrust cuts flat-lying 22.6+/-0.3 Ma volcanic rocks and underlying folded, Tertiary nonmarine strata in its footwall and was likely active during slip along the Oligocene Gangdese thrust system of southern Tibet. Ophiolitic melange and structurally overlying Jurassic flysch near Shiquanhe are interpreted to represent remnants of a subduction-accretion complex and forearc basin, respectively, that were obducted southward onto the margin of the Lhasa terrane during Late Jurassic-Early Cretaceous closure of the Bangong-Nujiang Ocean. Subsequent imbrication of the obducted sheet could have produced the two east-west trending belts of ophiolitic melanges, separated by similar to100 km, in western Tibet. Late Cretaceous-early Tertiary thin-skinned shortening may have been accommodated in the deeper crust by northward underthrusting and duplexing of Lhasa terrane rocks beneath the obducted ophiolitic melange and the Qiangtang terrane to the north. |
| WOS关键词 | INDIA-ASIA COLLISION ; FOLD-THRUST BELT ; KARAKORAM FAULT ZONE ; LOWER CRUSTAL FLOW ; SOUTHERN TIBET ; VOLCANIC-ROCKS ; NORTHERN TIBET ; K-FELDSPAR ; GEODYNAMIC SIGNIFICANCE ; SYSTEMATIC ANALYSIS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000184426500002 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78817]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Kapp, P |
| 作者单位 | 1.Australian Natl Univ, Inst Adv Studies, Canberra, ACT, Australia 2.Chinese Acad Sci, Inst Geol & Geophys, Lithosphere Tecton Evolut Lab, Beijing 100029, Peoples R China 3.Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA 4.Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA |
| 推荐引用方式 GB/T 7714 | Kapp, P,Murphy, MA,Yin, A,et al. Mesozoic and Cenozoic tectonic evolution of the Shiquanhe area of western Tibet[J]. TECTONICS,2003,22(4). |
| APA | Kapp, P,Murphy, MA,Yin, A,Harrison, TM,Ding, L,&Guo, JH.(2003).Mesozoic and Cenozoic tectonic evolution of the Shiquanhe area of western Tibet.TECTONICS,22(4). |
| MLA | Kapp, P,et al."Mesozoic and Cenozoic tectonic evolution of the Shiquanhe area of western Tibet".TECTONICS 22.4(2003). |
入库方式： OAI收割
来源：地质与地球物理研究所
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