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云南兰坪盆地推覆构造及其控矿作用
引用本文:何龙清,陈开旭,余凤鸣,魏君奇,杨爱平,李航.云南兰坪盆地推覆构造及其控矿作用[J].地质与勘探,2004,40(4):7-12.
作者姓名:何龙清  陈开旭  余凤鸣  魏君奇  杨爱平  李航
作者单位:1. 宜昌地质矿产研究所,宜昌,443003
2. 云南第三地质大队,大理,671000
基金项目:国土资源部定向科研项目
摘    要:兰坪盆地发育与金沙江-哀牢山造山带和澜沧江-昌宁-孟连造山带有关的前陆逆冲推覆构造,构成对冲式构造,两个系统推覆构造的界线大致是兰坪-云龙一线,逆冲推覆作用主要发生在喜马拉雅期.兰坪盆地内金沙江-哀牢山造山带前陆逆冲推覆构造对矿床和矿体的产出有明显的控制作用,其中金顶矿床受控于穹窿状主推覆断层,矿体产于推覆断层及其下盘的层间破碎带中;河西地区的各矿段由推覆前锋带上的冲起构造所控制,矿体沿主推覆断层和反冲断层分布.综合分析逆冲推覆构造的控矿特点,并对比已知矿区,认为白基阻山口地区是一个重要的成矿远景区.

关 键 词:兰坪盆地  推覆构造  控矿作用
文章编号:0495-5331(2004)04-0007-06

NAPPE TECTONICS AND THEIR ORE-CONTROLLING OF LANPING BASIN IN YUNNAN PROVINCE
HE Long-qing,CHEN Kai-xu,YU Feng-ming,WEI Jun-qi,YANG Ai-ping,LI Hang.NAPPE TECTONICS AND THEIR ORE-CONTROLLING OF LANPING BASIN IN YUNNAN PROVINCE[J].Geology and Prospecting,2004,40(4):7-12.
Authors:HE Long-qing  CHEN Kai-xu  YU Feng-ming  WEI Jun-qi  YANG Ai-ping  LI Hang
Institution:HE Long-qing 1,CHEN Kai-xu 1,YU Feng-ming 1,WEI Jun-qi 1,YANG Ai-ping 2,LI Hang 2
Abstract:There are two foreland thrust systems in the Lanping basin,which relate to Jinshajiang-Ailaoshan orogenic belt and Lancangjiang-Changning-Menglian orogenic belt respectively. The thrust systems make up a ramp style and were formed in Himalayan orogeny. The demarcation line of the two systems is in Lanping-Yunlong. The foreland thrust-nappe of Jinshajiang-Ailaoshan orogenic belt controls the mineral deposits and orebodies in the Lanping basin. Jinding mineral deposit is controlled by main domal thrust,and the ore bodies are in the main thrust and interlayer faults of footwall of the thrust. The ore bodies in the Hexi area are controlled by pop up of frontal zone and contribute along the main thrust and back-thrust. Based on the analysis of ore-controlling features and comparison with other mineral districts,it is suggested that the Baijizushankou area is an important mineralizing prospective district.
Keywords:Lanping basin  thrust system  ore-controlling
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