Geology of the summit limestone of Mount Qomolangma (Everest) and cooling history of the Yellow Band under the Qomolangma detachment
文献类型：期刊论文
| 作者 | Sakai, H; Sawada, M; Takigami, Y; Orihashi, Y; Danhara, T; Iwano, H; Kuwahara, Y; Dong, Q; Cai, HW; Li, JG |
| 刊名 | ISLAND ARC
 |
| 出版日期 | 2005-12-01 |
| 卷号 | 14期号:4页码:297-310 |
| 关键词 | Ar-40-ar-39 Age Fission-track Age Mount Everest Qomolangma Detachment Rb-87-sr-86 Isochron Age Yellow Band |
| ISSN号 | 1038-4871 |
| 文献子类 | Article |
| 英文摘要 | Newly discovered peloidal limestone from the summit of Mount Qomolangma ( Mount Everest) contains skeletal fragments of trilobites, ostracods and crinoids. They are small pebble-sized debris interbedded in micritic bedded limestone of the Qomolangma Formation, and are interpreted to have been derived from a bank margin and redeposited in peri-platform environments. An exposure of the Qomolangma detachment at the base of the first step ( 8520 m), on the northern slope of Mount Qomolangma was also found. Non-metamorphosed, strongly fractured Ordovician limestone is separated from underlying metamorphosed Yellow Band by a sharp fault with a breccia zone. The Ar-40-Ar-39 ages of muscovite from the Yellow Band show two-phase metamorphic events of approximately 33.3 and 24.5 Ma. The older age represents the peak of a Barrovian-type Eo-Himalayan metamorphic event and the younger age records a decompressional high-temperature Neo-Himalayan metamorphic event. A muscovite whole-rock Rb-87-Sr-86 isochron of the Yellow Band yielded 40.06 +/- 0.81 Ma, which suggests a Pre-Himalayan metamorphism, probably caused by tectonic stacking of the Tibetan Tethys sediments in the leading margin of the Indian subcontinent. Zircon and apatite grains, separated from the Yellow Band, gave pooled fission-track ages of 14.4 +/- 0.9 and 14.4 +/- 1.4 Ma, respectively. These new chronologic data indicate rapid cooling of the hanging wall of the Qomolangma detachment from approximately 350 degrees C to 130 degrees C during a short period (15.5-14.4 Ma). |
| WOS关键词 | HIMALAYAN METAMORPHIC CORE ; ROCK REFERENCE SAMPLES ; NEPAL-HIMALAYA ; EASTERN NEPAL ; SOUTH TIBET ; EVOLUTION ; AGE ; LEUKOGRANITES ; INDIA ; GEOCHRONOLOGY |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000234088300002 |
| 出版者 | BLACKWELL PUBLISHING |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65034]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Sakai, H |
| 作者单位 | 1.Kyushu Univ, Dept Earth Sci, Fukuoka 8108560, Japan 2.Kanto Gakuen Univ, Gunma 3738515, Japan 3.Univ Tokyo, Earthquake Res Inst, Tokyo 1130032, Japan 4.Kyoto Fiss Track Co Ltd, Kyoto 6038832, Japan 5.Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China 6.Acad Sinica, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sakai, H,Sawada, M,Takigami, Y,et al. Geology of the summit limestone of Mount Qomolangma (Everest) and cooling history of the Yellow Band under the Qomolangma detachment[J]. ISLAND ARC,2005,14(4):297-310. |
| APA | Sakai, H.,Sawada, M.,Takigami, Y.,Orihashi, Y.,Danhara, T.,...&Li, JG.(2005).Geology of the summit limestone of Mount Qomolangma (Everest) and cooling history of the Yellow Band under the Qomolangma detachment.ISLAND ARC,14(4),297-310. |
| MLA | Sakai, H,et al."Geology of the summit limestone of Mount Qomolangma (Everest) and cooling history of the Yellow Band under the Qomolangma detachment".ISLAND ARC 14.4(2005):297-310. |
入库方式： OAI收割
来源：地质与地球物理研究所
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