Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31541.1 |
Late Paleozoic closure of the Ob-Zaisan Ocean along the Irtysh shear zone (NW China): Implications for arc amalgamation and oroclinal bending in the Central Asian orogenic belt | |
Li, Pengfei1; Sun, Min1; Rosenbaum, Gideon2; Jourdan, Fred3,4; Li, Sanzhong5,6; Cai, Keda7 | |
2017-05-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Australia |
英文摘要 | The largest accretionary orogen in the world, the Central Asian orogenic belt, has evolved through the assembly of various oceanic and continental blocks. Understanding the processes associated with the development of this orogenic belt relies on precise recognition of the boundaries between various terranes. One such major suture zone, which records the collisional history of the Siberian marginal arc system (Chinese Altai) with intra-oceanic arc systems (East/ West Junggar), is the Irtysh shear zone in NW China. The spatial continuity and the tectonic nature of this shear zone are still poorly under-stood, but its development has supposedly made a significant impact on the architecture of the western Central Asian orogenic belt and the formation of the Kazakhstan orocline. Here, we provide new insight into the evolution of this shear zone based on detrital zircon ages, Hf isotope composition, structural data and Ar-40/Ar-39 age constraints on the timing of deformation. Our results show a major discrepancy in detrital zircon populations and Hf model ages across the southern Chinese Altai and the northern East/ West Junggar, thus allowing us to map the exact location of the tectonic boundary. Detrital zircon data constrain the initial closure of the Ob-Zaisan Ocean to the late Carboniferous (<323 Ma), and new structural and Ar-40/Ar-39 geochronological data shed light on the subsequent collisional processes. We propose that the collisional zone between the Chinese Altai and the East/West Junggar was initially subjected to crustal thickening at ca. 323-295 Ma, followed by orogen-parallel extension (ca. 295 Ma) and transpressional deformation (ca. 286-253 Ma). The closure of the Ob-Zaisan Ocean in NW China postdates the initial phase of oroclinal bending in the western Central Asian orogenic belt, thus indi-cat-ing that oroclinal bending initiated during subduction. Based on our new constraints and other available geological data, we suggest that the early stage of oroclinal bending was likely driven by slab rollback. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403309300003 |
WOS关键词 | ZIRCON U-PB ; CONTINENTAL-CRUST GROWTH ; SOLONKER SUTURE ZONE ; ND-SR ISOTOPES ; TECTONIC EVOLUTION ; WEST JUNGGAR ; NORTHWEST CHINA ; ACCRETIONARY OROGENESIS ; VOLCANIC-ROCKS ; ALTAI OROGEN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25063 |
专题 | 地球科学 |
作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China; 2.Univ Queensland, Sch Earth & Environm Sci, Brisbane, Qld 4072, Australia; 3.Curtin Univ, Western Australian Argon Isotope Facil, Dept Appl Geol, GPO Box U1987, Perth, WA 6845, Australia; 4.Curtin Univ, JdL Ctr, GPO Box U1987, Perth, WA 6845, Australia; 5.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China; 6.Minist Educ, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China; 7.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Pengfei,Sun, Min,Rosenbaum, Gideon,et al. Late Paleozoic closure of the Ob-Zaisan Ocean along the Irtysh shear zone (NW China): Implications for arc amalgamation and oroclinal bending in the Central Asian orogenic belt[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Li, Pengfei,Sun, Min,Rosenbaum, Gideon,Jourdan, Fred,Li, Sanzhong,&Cai, Keda.(2017).Late Paleozoic closure of the Ob-Zaisan Ocean along the Irtysh shear zone (NW China): Implications for arc amalgamation and oroclinal bending in the Central Asian orogenic belt.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Li, Pengfei,et al."Late Paleozoic closure of the Ob-Zaisan Ocean along the Irtysh shear zone (NW China): Implications for arc amalgamation and oroclinal bending in the Central Asian orogenic belt".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
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