世界地质 2016, 35(4) 1034-1040 DOI:     ISSN: 1004-5589 CN: 22-1111/P

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本文关键词相关文章
滇西北
独龙江岩浆弧
丙中洛地块
班公错&mdash
东巧缝合带
高黎贡山断裂
怒江断裂
本文作者相关文章
王学武
李新仁
刘凤祥
严城民
周喜林
王长兵
PubMed
Article by Wang, X. W.
Article by Li, X. R.
Article by Liu, F. X.
Article by Yan, C. M.
Article by Zhou, X. L.
Article by Wang, C. B.
滇西北独龙江岩浆弧和丙中洛地块的划分与特征
王学武, 李新仁, 刘凤祥, 严城民, 周喜林, 王长兵
1. 云南省核工业二〇九地质大队,昆明 650032; 2. 云南省地矿局区域地质矿产调查大队,云南 玉溪 653100
摘要

为查明滇西北贡山地区大地构造单元的划分与特征,系统收集整理了不同比例尺的区域地质调查资料,得出 4 方面新认识: ①该区大地构造单元划分为独龙江岩浆弧和丙中洛地块,二者分界为向东倾斜的高黎贡山逆冲推覆断裂; ②独龙江岩浆弧属腾冲造山带,丙中洛地块属三江造山带,其间被中特提斯洋所分隔; ③中特提斯洋于中侏罗世打开,晚侏罗世—早白垩世早期向西俯冲消减,早白垩世晚期—晚白垩世闭合; ④班公错—东巧缝合带在该区已被向西逆冲推覆的高黎贡山岩群 (Pt 1 G. ) 所压覆。

关键词 滇西北   独龙江岩浆弧   丙中洛地块   班公错&mdash   东巧缝合带   高黎贡山断裂   怒江断裂  
Division and characteristics of Dulongjiang magmatic arc
WANG Xue-Wu, LI Xin-Ren, LIU Feng-Xiang, YAN Cheng-Min, ZHOU Xi-Lin, WANG Chang-Bing
1. No. 209 Geological Party,Geological Bureau of Yunnan Nuclear Industry,Kunming 650032,China; 2. Regional Geological Survey Party,Yunnan Bureau of Geology and Mineral Resources,Yuxi 653100,Yunnan,China
Abstract:

To clarify the division and characteristics of Gongshan tectonic units in northwestern Yunnan,the authors collected and collated different scaled regional geological survey data,and then obtained four new under- standings: ① tectonic units are divided into Dulongjiang magmatic arc and Bingzhongluo block,and the demarca- tion between them is the inclined eastward Gaoligong Mountain thrusting nappe fault; ②Dulongjiang magmatic arc belongs to Tengchong orogenic belt,while Bingzhongluo block belongs to the Three River orogenic belt,which are separated by Meso-Tethys; ③ the Meso-Tethys opened in Middle Jurassic,westward subducted in Late Jurassic- early Early Cretaceous,and closed in later Early Cretaceous and Late Cretaceous; ④ Bangongcuo-Dongqiao suture zone in the district has been covering by the Gaoligong Mountain rock group which westward thrust nappe.

Keywords: northwestern Yunnan   Dulongjiang magmatic arc   Bingzhongluo block   Bangongcuo--Dongqiao suture zone   Gaoligongshan fault   Nujiang fault  
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