Thermal structure, rock exhumation, and glacial erosion of the Namche Barwa Peak, constraints from thermochronological data
文献类型：期刊论文
| 作者 | Tu, Ji-Yao1; Ji, Jian-Qing1; Sun, Dong-Xia2; Gong, Jun-Feng1; Zhong, Da-Lai2; Han, Bao-Fu1 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2015-06-01 |
| 卷号 | 105页码:223-233 |
| 关键词 | Eastern Himalayan syntaxis Apatite fission track Biotite Ar-40/Ar-39 Exhumation rates Glacial erosion |
| DOI | 10.1016/j.jseaes.2015.03.035 |
| 文献子类 | Article |
| 英文摘要 | In this paper, we report thermochronological data from the southwest slope of Namche Barwa Peak, the core region of the eastern Himalayan syntaxis. The data include apatite fission track (AFT) ages of ten bedrock samples ranging from 0.5 +/- 0.1 to 3.5 +/- 0.5 Myr and biotite Ar-40/Ar-39 ages from 2.53 +/- 0.14 to 5.57 +/- 0.19 Myr, corresponding to elevations from 5370 to 3060 m. These ages are characterized by inverted age-elevation relationships (AERs), and the AERs of the AFT ages and the biotite Ar-40/Ar-39 ages are approximately parallel. Numerical modeling suggests that a possible change in the surface topography or faulting in this region could not have led to the observed inverted AERs. These observed ages demonstrate that a field of nonuniform exhumation rates existed in the relatively shallow crust (above the 110 degrees C isotherm) of the Namche Barwa Peak region. The exhumation rates increase significantly from 0.3 km/Myr to 5 km/Myr with increasing proximity to the peak. However, the exhumation rates in the relatively deep crust (below the 110 degrees C isotherm) of the same area are uniform at approximately 1.7 km/Myr. This distinctive exhumation field and the strong spatial correlation between the intense glacial erosion and high rock exhumation rate of Namche Barwa Peak suggest that glacial erosion most likely drives the rapid exhumation of Namche Barwa Peak. (C) 2015 Published by Elsevier Ltd. |
| WOS关键词 | EASTERN HIMALAYAN SYNTAXIS ; ST-ELIAS OROGEN ; TECTONIC EVOLUTION ; CLIMATE-CHANGE ; RAPID EROSION ; SOUTHERN ALPS ; NEW-ZEALAND ; GEOCHRONOLOGY ; DENUDATION ; TOPOGRAPHY |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000355051700014 |
| 资助机构 | National Natural Science Foundation of China(40872149 ; National Natural Science Foundation of China(40872149 ; China Geological Survey((2013)02-030-001) ; China Geological Survey((2013)02-030-001) ; 41472175) ; 41472175) ; National Natural Science Foundation of China(40872149 ; National Natural Science Foundation of China(40872149 ; China Geological Survey((2013)02-030-001) ; China Geological Survey((2013)02-030-001) ; 41472175) ; 41472175) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62509]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belt & Crustal Evolut, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tu, Ji-Yao,Ji, Jian-Qing,Sun, Dong-Xia,et al. Thermal structure, rock exhumation, and glacial erosion of the Namche Barwa Peak, constraints from thermochronological data[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,105:223-233. |
| APA | Tu, Ji-Yao,Ji, Jian-Qing,Sun, Dong-Xia,Gong, Jun-Feng,Zhong, Da-Lai,&Han, Bao-Fu.(2015).Thermal structure, rock exhumation, and glacial erosion of the Namche Barwa Peak, constraints from thermochronological data.JOURNAL OF ASIAN EARTH SCIENCES,105,223-233. |
| MLA | Tu, Ji-Yao,et al."Thermal structure, rock exhumation, and glacial erosion of the Namche Barwa Peak, constraints from thermochronological data".JOURNAL OF ASIAN EARTH SCIENCES 105(2015):223-233. |
入库方式： OAI收割
来源：地质与地球物理研究所
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