| Tectonic evolution of the Yarlung suture zone, Lopu Range region, southern Tibet | |
| Laskowski, AK (Laskowski, Andrew K.)1; Kapp, P (Kapp, Paul)1; Ding, L (Ding, Lin)2; Campbell, C (Campbell, Clay)1; Liu, XH (Liu, XiaoHui)2; Laskowski, AK | |
| Source Publication | TECTONICS
 |
| 2017 | |
| Volume | 36Issue:1Pages:108-136 |
| DOI | 10.1002/2016TC004334 |
| Abstract | The Lopu Range, located similar to 600km west of Lhasa, exposes a continental high-pressure metamorphic complex beneath India-Asia (Yarlung) suture zone assemblages. Geologic mapping, 14 detrital U-Pb zircon (n=1895 ages), 11 igneous U-Pb zircon, and nine zircon (U-Th)/He samples reveal the structure, age, provenance, and time-temperature histories of Lopu Range rocks. A hornblende-plagioclase-epidote paragneiss block in ophiolitic melange, deposited during Middle Jurassic time, records Late Jurassic or Early Cretaceous subduction initiation followed by Early Cretaceous fore-arc extension. A depositional contact between fore-arc strata (maximum depositional age 971Ma) and ophiolitic melange indicates that the ophiolites were in a suprasubduction zone position prior to Late Cretaceous time. Five Gangdese arc granitoids that intrude subduction-accretion melange yield U-Pb ages between 49 and 37Ma, recording Eocene southward trench migration after collision initiation. The south dipping Great Counter Thrust system cuts older suture zone structures, placing fore-arc strata on the Kailas Formation, and sedimentary-matrix melange on fore-arc strata during early Miocene time. The north-south, range-bounding Lopukangri and Rujiao faults comprise a horst that cuts the Great Counter Thrust system, recording the early Miocene (similar to 16Ma) transition from north-south contraction to orogen-parallel (E-W) extension. Five early Miocene (17-15Ma) U-Pb ages from leucogranite dikes and plutons record crustal melting during extension onset. Seven zircon (U-Th)/He ages from the horst block record 12-6Ma tectonic exhumation. JurassicEocene Yarlung suture zone tectonics, characterized by alternating episodes of contraction and extension, can be explained by cycles of slab rollback, breakoff, and shallow underthrustingsuggesting that subduction dynamics controlled deformation. |
| Subject Area | 地质学 |
| WOS ID | WOS:000395098100005 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | INDIA-ASIA COLLISION XIGAZE FORE-ARC U-PB ZIRCON THICKENED CONTINENTAL-CRUST EAST-WEST EXTENSION SOUTHWESTERN TIBET TETHYAN HIMALAYA HIGH-PRESSURE THERMOCHRONOLOGIC CONSTRAINTS (U-TH)/HE THERMOCHRONOMETRY |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics ; Geochemistry & Geophysics |
| Cooperation Status | 国际 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8394 |
| Collection | 图书馆 |
| Corresponding Author | Laskowski, AK |
| Affiliation | 1.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA. 2.Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China. |
| Recommended Citation GB/T 7714 | Laskowski, AK ,Kapp, P ,Ding, L ,et al. Tectonic evolution of the Yarlung suture zone, Lopu Range region, southern Tibet[J]. TECTONICS,2017,36(1):108-136. |
| APA | Laskowski, AK ,Kapp, P ,Ding, L ,Campbell, C ,Liu, XH ,&Laskowski, AK.(2017).Tectonic evolution of the Yarlung suture zone, Lopu Range region, southern Tibet.TECTONICS,36(1),108-136. |
| MLA | Laskowski, AK ,et al."Tectonic evolution of the Yarlung suture zone, Lopu Range region, southern Tibet".TECTONICS 36.1(2017):108-136. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.36 108-136 2017.pd（17368KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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