Constraining the deposition time and tectonic background of the Habahe Group of the Altai
文献类型：期刊论文
| 作者 | Yuan Chao; Sun Min; Long XiaoPing; Xia XiaoPing; Xiao WenJiao; Li XianHua; Lin ShouFa; Cai KeDa |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2007-07-01 |
| 卷号 | 23期号:7页码:1635-1644 |
| 关键词 | Altai zircon U-Pb dating clastic rock Habahe Group deposition time tectonic settings |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Habahe Group mainly consists of elastic sediments, which widely distribute in the Chinese Altai and can provide important constraints on the tectonic evolution of the Central Asian Orogenic Belt (CAOB). However, there are different opinions about its deposition time and tectonic background. Previous studies suggested that the Habahe Group formed in Sinian to Mid-Ordovician or Mid-to Late Ordovician in a passive continental margin. On the other hand, recent geological investigations reveal a long lasting subduction-related setting in the Chinese Altai at least since Cambrian. The current geochronological study for detrital zircons from the Habahe Group reveals that the detrital zircons of individual samples, irrespective of their lithological and metamorphic differences, all show similar age patterns, with the early Paleozoic ((206)Pb/(238)U age = 463 +/- 542Ma) grains predominating. The youngest detrital zircons from different samples display similar ages (ca. 470Ma), which may reflect the maximum deposition time of the Habahe Group. Dating of growth rim of detrital zircons from migmatite yielded a Mid-Devonian age (384 +/- 6Ma), which was coeval with intrusion of Early to Mid-Devonian granitic plutons in the area and clearly indicates the minimum deposition time of the Habahe Group. Therefore, the deposition time of the Habahe Group can be constrained to be Mid-Ordovician to Early Devonian. Zircon U Pb dating results indicate that the detrital zircons of the Habahe Group are dominated by early Paleozoic grains, with small proportion formed in Precambrian. The early Paleozoic detrital zircons are mostly magmatic in origin, and their less rounded shapes indicate a limited transportation. The age and morphological characteristics of the detrital zircons are consistent with those of detrital zircons in active tectonic settings and indicate that the Chinese Altai was under an active continental margin environment during the Early Paleozoic. |
| WOS关键词 | NORTHWEST CHINA ; DETRITAL ZIRCON ; CRUSTAL GROWTH ; EVOLUTION ; SEDIMENTARY ; OROGEN ; ROCKS ; MOUNTAINS ; XINJIANG ; RECORD |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000249590500009 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68222]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yuan Chao |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Waterloo, Dept Earth Sci, Waterloo, ON N2L 3G1, Canada 5.Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan Chao,Sun Min,Long XiaoPing,et al. Constraining the deposition time and tectonic background of the Habahe Group of the Altai[J]. ACTA PETROLOGICA SINICA,2007,23(7):1635-1644. |
| APA | Yuan Chao.,Sun Min.,Long XiaoPing.,Xia XiaoPing.,Xiao WenJiao.,...&Cai KeDa.(2007).Constraining the deposition time and tectonic background of the Habahe Group of the Altai.ACTA PETROLOGICA SINICA,23(7),1635-1644. |
| MLA | Yuan Chao,et al."Constraining the deposition time and tectonic background of the Habahe Group of the Altai".ACTA PETROLOGICA SINICA 23.7(2007):1635-1644. |
入库方式： OAI收割
来源：地质与地球物理研究所
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