Formation of tectonic peperites from alkaline magmas intruded into wet sediments in the Beiya area, western Yunnan, China
文献类型：期刊论文
| 作者 | Xu, Xing-Wang; Cai, Xin-Ping; Zhong, Jia-You; Song, Bao-Chang; Peters, Stephen G. |
| 刊名 | JOURNAL OF STRUCTURAL GEOLOGY
 |
| 出版日期 | 2007 |
| 卷号 | 29期号:8页码:1400-1413 |
| 关键词 | magma wet sediments intrusion tectonic peperites beiya western yunnan |
| ISSN号 | 0191-8141 |
| DOI | 10.1016/j.jsg.2007.04.007 |
| 文献子类 | Article |
| 英文摘要 | Tertiary (3.78 Ma to 3.65 Ma) biotite-K-feldspar porphyritic bodies intrude Tertiary, poorly consolidated lacustrine sedimentary rocks in the Beiya mineral district in southwestern China. The intrusives are characterized by a rnicrocrystalline and vitreous-cryptocrystalline groundmass, by replacement of some tabular K-feldspar phenocrysts with microcrystalline chlorite and calcite, and by Fe-rich rings surrounding biotite phenocrysts. Peculiar structures, such as contemporary contact faults and slickensides, ductile shear zones and flow folds, foliation and lineations, tension fractures, and banded and boudin peperites, are developed along the contact zones of the intrusives. These features are related to the forceful intrusion of the alkaline magmas into the wet Tertiary sediments. The partially consolidated magmas were deformed and flattened by continued forceful magma intrusion that produced boudinaged and banded peperites. These peperites characterized by containing oriented deformation fabrics are classified as tectonic peperites as a new type of peperite, and formation of these tectonic peperites was related to fracturing of magmas caused by forceful intrusion and shear deformation and to contemporary migration and injection of fluidized sediments along fractures that dismembered the porphyritic magma. Emplacement of the magma into the wet sediments in the Beiya area is interpreted to be related to a large pressure difference rather than to the buoyancy force. (C) 2007 Elsevier Ltd. All rights reserved. |
| WOS关键词 | RIVER SHEAR ZONE ; CRACK-PROPAGATION ; TRANSPORT ; CONSTRAINTS ; EMPLACEMENT ; CALIFORNIA ; AUSTRALIA ; DIAPIRISM ; MECHANISM ; VOLCANISM |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000249263400010 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67722]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Xing-Wang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.US Geol Survey, Reston, VA 20192 USA |
| 推荐引用方式 GB/T 7714 | Xu, Xing-Wang,Cai, Xin-Ping,Zhong, Jia-You,et al. Formation of tectonic peperites from alkaline magmas intruded into wet sediments in the Beiya area, western Yunnan, China[J]. JOURNAL OF STRUCTURAL GEOLOGY,2007,29(8):1400-1413. |
| APA | Xu, Xing-Wang,Cai, Xin-Ping,Zhong, Jia-You,Song, Bao-Chang,&Peters, Stephen G..(2007).Formation of tectonic peperites from alkaline magmas intruded into wet sediments in the Beiya area, western Yunnan, China.JOURNAL OF STRUCTURAL GEOLOGY,29(8),1400-1413. |
| MLA | Xu, Xing-Wang,et al."Formation of tectonic peperites from alkaline magmas intruded into wet sediments in the Beiya area, western Yunnan, China".JOURNAL OF STRUCTURAL GEOLOGY 29.8(2007):1400-1413. |
入库方式： OAI收割
来源：地质与地球物理研究所
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