Emplacement age and tectonic implications of the brecciated limestone at the edge of the Longmenshan klippe
文献类型：期刊论文
| 作者 | Xue ZhenHua1,3; Shang QingHua2; Jiang WenYing1; Wang QingChen1; Li ShuangJian4 |
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2016-03-01 |
| 卷号 | 59期号:3页码:590-600 |
| 关键词 | Longmenshan Thrust Belt Klippe Artemisia Brecciated Limestone Thin-skinned Structure |
| DOI | 10.1007/s11430-015-5209-0 |
| 文献子类 | Article |
| 英文摘要 | The Longmenshan thrust belt (LMTB) is one of the best natural laboratories for thin-skinned tectonics and has developed a series of NE-SW trending fold-and-thrust structures represented by a series of nappes and klippes, exemplified by the Tangbazi and Bailuding klippe. However, the timing and emplacement mechanism of these klippes are still in dispute. Three possible mechanisms have been proposed: (1) a Mesozoic-Cenozoic southeastward thrusting, (2) a Cenozoic gravity gliding, and (3) glacial deposition. Almost all of these klippes are tectonic and overlaid on folded Late Triassic sandstone except the Tangbazi klippe, which is located in the center of the LMTB and has a narrow tail extending southeastward and covering Jurassic-Quaternary rocks. This geometric relationship is considered the most important stratigraphic evidence to support the post-Cenozoic emplacement of the Longmenshan klippe. Our structural and petrological observations show that the rocks at the front of the Tangbazi and Bailuding structures are brecciated limestone, which is assumed to have been generated by a gravitational collapse and is not characteristic of the massive Permian strata. Artemisia pollen, which has been exclusively recognized in post-Late Eocene strata in Central Asia, was found in the matrix of this brecciated limestone. Therefore, our discovery indicates that the brecciated limestone was deposited after the Late Eocene rather than during the Permian as annotated on the geological map. In contrast, unbrecciated, massive Permian limestone overlaid on the folded Late Triassic rocks. Hence, the anomalous relationship of Permian strata overlaying Late Triassic rocks cannot be evidence of Cenozoic emplacement. According to currently recognized bulk strata relationships, we can only be sure that the klippe was emplaced in the post Late Triassic. The petrological characteristics of the brecciated limestone show that it was crumbled before the re-sedimentation of the breccia, implying that the LMTB might have experienced a rapid uplift during the Late Eocene. |
| WOS关键词 | TIBETAN PLATEAU ; GEOCHRONOLOGICAL CONSTRAINTS ; EASTERN MARGIN ; OROGENIC BELT ; SOUTH CHINA ; THRUST BELT ; SHAN ; DEFORMATION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000371416000016 |
| 资助机构 | National Natural Science Foundation of China(41372028 ; Project of Major State Special Research on Petroleum(2011ZX05008-001) ; 41225009 ; 41472193) |
| 源URL | [http://124.16.247.212/handle/311034/7120]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.China Petr & Chem Corp, Inst Petr Explorat & Dev, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xue ZhenHua,Shang QingHua,Jiang WenYing,et al. Emplacement age and tectonic implications of the brecciated limestone at the edge of the Longmenshan klippe[J]. SCIENCE CHINA-EARTH SCIENCES,2016,59(3):590-600. |
| APA | Xue ZhenHua,Shang QingHua,Jiang WenYing,Wang QingChen,&Li ShuangJian.(2016).Emplacement age and tectonic implications of the brecciated limestone at the edge of the Longmenshan klippe.SCIENCE CHINA-EARTH SCIENCES,59(3),590-600. |
| MLA | Xue ZhenHua,et al."Emplacement age and tectonic implications of the brecciated limestone at the edge of the Longmenshan klippe".SCIENCE CHINA-EARTH SCIENCES 59.3(2016):590-600. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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