Texture and composition of the Lajishankou accretionary wedge of the South Qilian belt, NW China
文献类型：期刊论文
| 作者 | Fu ChangLei1,2; Yan Zhen2; Wang ZongQi1; Niu ManLan3; Guo XianQing1; Yu LiangJun4; Li JiLiang4 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2018 |
| 卷号 | 34期号:7页码:2049-2064 |
| 关键词 | Accretionary wedge Melange Olistostrome Lajishan South Qilian belt |
| ISSN号 | 1000-0569 |
| 英文摘要 | Detailed studies on the texture and composition of accretionary wedge/complex can provide important information on the evolution of ancient ocean basins and the reconstruction of ancient plate tectonics. The North Qilian belt contains multiple belts of accretionary complex and record Early Paleozoic subduction and closure processes of the Proto-Tethyan Ocean between the Alxa and Central Qilian blocks. However, the tectonic evolution of the South Qilian belt is still hotly debated. Recently, our geological mapping demonstrates that the Lajishankou accretionary complex of the South Qilian belt, which consists of highly foliated basalt, black and red chert, sandstone, mudstone, and melanges showing typical block-in-matrix fabric and is characterized by intense deformation recorded by duplex, thrust faults, rootless intrafolial folds, tight fold, and penetrative foliations, crops out structurally beneath the ophiolite complex. The melange is composed of various exotic or native blocks, including plagiogranite (561Ma), anorthosite (507Ma), dolerite, basalt, chert and sandstone, within a foliated fine-grained turbiditic matrix. The synsedimentary structures in matrix and sandstone blocks suggest an olistostromal origin for this melange. Spatially, the Lajishankou accretionary complex and the overlying ophiolite complex were thrust over turbidite of Qingshipo Formation and share the similar composition, deformation, spatial and temporal distribution with those in Angsiduo area. The accretionary complex, ophiolite, and the southern island arc rocks exposed in both Lajishankou and Angsiduo areas constitute a Cambrian-Early Ordovician trench-arc system within South Qilian belt during the Cambrian-Early Ordovician southward subduction of the South Qilian Ocean. |
| WOS关键词 | PALEOZOIC GRANITIC PLUTONS ; U-PB ; EVOLUTION ; ZIRCON ; GEOCHEMISTRY ; CONSTRAINTS ; ROCKS ; GEOCHRONOLOGY ; TERRANE ; MARGIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000451724300014 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/89608]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Yan Zhen |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 3.Hefei Univ Technol, Dept Resources & Environm, Hefei 230009, Anhui, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu ChangLei,Yan Zhen,Wang ZongQi,et al. Texture and composition of the Lajishankou accretionary wedge of the South Qilian belt, NW China[J]. ACTA PETROLOGICA SINICA,2018,34(7):2049-2064. |
| APA | Fu ChangLei.,Yan Zhen.,Wang ZongQi.,Niu ManLan.,Guo XianQing.,...&Li JiLiang.(2018).Texture and composition of the Lajishankou accretionary wedge of the South Qilian belt, NW China.ACTA PETROLOGICA SINICA,34(7),2049-2064. |
| MLA | Fu ChangLei,et al."Texture and composition of the Lajishankou accretionary wedge of the South Qilian belt, NW China".ACTA PETROLOGICA SINICA 34.7(2018):2049-2064. |
入库方式： OAI收割
来源：地质与地球物理研究所
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