Provenance and temporal constraints of the Early Cambrian Maotianshan Shale, Yunnan Province, China
文献类型：期刊论文
| 作者 | Hofmann, M. H.1; Li, X. H.2; Chen, J.3; MacKenzie, L. A.1; Hinman, N. W.1 |
| 刊名 | GONDWANA RESEARCH
 |
| 出版日期 | 2016-09-01 |
| 卷号 | 37页码:348-361 |
| 关键词 | Petrology Geochemistry Detrital Zircon U-pb Age Paleogeography Chengjiang Biota |
| DOI | 10.1016/j.gr.2015.08.015 |
| 文献子类 | Article |
| 英文摘要 | The Cambrian Maotianshan Shale in Yunnan Province, China contains the well-preserved soft-body fossils of the Chengjiang Biota. The high quality preservation of the non-mineralizing biota (soft tissues and whole carcasses) shows regional and temporal differences, suggesting that paleogeography and local environmental conditions might have contributed to the taphonomy of these fossils. In this paper we present new results from petrographic, geochemical and detrital zircon analyses, and provide a new interpretation about the provenance of the Maotianshan Shale, as well as add to the understanding of the paleogeography of the South China Block during the Cambrian Stage 3. Results from petrographic analysis indicate that the provenance of the Maotianshan Shale is a recycled orogen overall, bordering the western and southwestern margin on the Yangtze Block. The most likely source of the terrigenous material is an exhumed area extending from the Kangdian paleoland to the southeast, paralleling the Song Ma fault zone. Minor regional differences in geochemical and petrographic proxies between the northwestern Jianshan/Ercai area and the southeastern Maotianshan/Xiaolantian area suggest influence of local sources. Sediments of the southeastern province are less mature and samples include minor elements commonly associated with mafic sources. Sediments from the northwestern province are more mature, largely lack mafic components and are enriched in Zr and Hf. The major population of the Maotianshan Shale detrital zircons group at similar to 800 Ma. This crystallization age matches well with the age of a widely spread felsic volcanic and intrusive event associated with the Neoproterozoic Kangdian rift, suggesting that these igneous rocks are most likely a major provenance for the Maotianshan sediments. The youngest zircon population yields consistent Concordia ages of similar to 520 Ma, representing a maximum age constraint on the timing of deposition of the Maotianshan Shale. The zircon crystals of the similar to 520 Ma populations are euhedral with magmatic zoning, indicative of short-distance transport. Volcanic activity along the Song Ma suture zone is a potential source for the similar to 520 Ma detrital zircon suite. (C) 2015 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. |
| WOS关键词 | PB ZIRCON GEOCHRONOLOGY ; SOUTH CHINA ; YANGTZE BLOCK ; GEOCHEMICAL EVIDENCE ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; WEATHERING PROFILES ; CONTINENTAL-CRUST ; SEDIMENTARY-ROCKS ; CHENGJIANG BIOTA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000384703200022 |
| 资助机构 | National Science Foundation (NSF-RAPID)(EAR-1338442) ; National Science Foundation (NSF-RAPID)(EAR-1338442) ; Chinese Ministry of Science and Technology(2013CB835005) ; Chinese Ministry of Science and Technology(2013CB835005) ; National Science Foundation of China(41023008 ; National Science Foundation of China(41023008 ; National Science Foundation(NSF-EAPSI 0914034) ; National Science Foundation(NSF-EAPSI 0914034) ; University of Montana ; University of Montana ; Geological Society of America's Graduate Student Research Grant ; Geological Society of America's Graduate Student Research Grant ; Sigma Xi Grants In Aid Award ; Sigma Xi Grants In Aid Award ; 41272008) ; 41272008) ; National Science Foundation (NSF-RAPID)(EAR-1338442) ; National Science Foundation (NSF-RAPID)(EAR-1338442) ; Chinese Ministry of Science and Technology(2013CB835005) ; Chinese Ministry of Science and Technology(2013CB835005) ; National Science Foundation of China(41023008 ; National Science Foundation of China(41023008 ; National Science Foundation(NSF-EAPSI 0914034) ; National Science Foundation(NSF-EAPSI 0914034) ; University of Montana ; University of Montana ; Geological Society of America's Graduate Student Research Grant ; Geological Society of America's Graduate Student Research Grant ; Sigma Xi Grants In Aid Award ; Sigma Xi Grants In Aid Award ; 41272008) ; 41272008) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53306]  |
| 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.Univ Montana, Dept Geosci, 32 Campus Dr 1296, Missoula, MT 59812 USA 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Nanjing Univ, Inst Evo Dev Biol, Nanjing Inst Geol & Palaeontol, Nanjing, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hofmann, M. H.,Li, X. H.,Chen, J.,et al. Provenance and temporal constraints of the Early Cambrian Maotianshan Shale, Yunnan Province, China[J]. GONDWANA RESEARCH,2016,37:348-361. |
| APA | Hofmann, M. H.,Li, X. H.,Chen, J.,MacKenzie, L. A.,&Hinman, N. W..(2016).Provenance and temporal constraints of the Early Cambrian Maotianshan Shale, Yunnan Province, China.GONDWANA RESEARCH,37,348-361. |
| MLA | Hofmann, M. H.,et al."Provenance and temporal constraints of the Early Cambrian Maotianshan Shale, Yunnan Province, China".GONDWANA RESEARCH 37(2016):348-361. |
入库方式： OAI收割
来源：地质与地球物理研究所
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