摘要
通过1∶5000矿区地质填图、5500m3的山地工程揭露和物化探工作,基本查明了勒青拉铅锌矿床的控矿构造。经研究认为,勒青拉铅锌矿床不同于日本火山岩型黑矿,也不同于在冈底斯成矿带上形成于下二叠世与拉张背景弧火山岩有关的铜、铅、锌金属矿床。它与火山活动没有关系,而与燕山期花岗闪长岩的侵入有关。野外地质和物化探工作表明,矿化受东西向断层控制,铅锌矿体一般分布于东西向断裂的下盘,严格受近东西向断裂控制。
The orefield structures of the Leqingla lead-zinc deposit in Lhunzhub, Xizang are examined on the basis of 1∶50 000 Geological Map and geological engineering, geophysical and geochemical prospecting. Unlike the (volcanic)-(type) kuroko deposit, the Leqingla (lead)-(zinc) deposit is believed to be associated with not (volcanic) activity but the emplacement of granodiorites. The mineralization is generally constrained by the (EW)-(trending) faults; the (lead)-(zinc) ores commonly appear on the footwall of the faults.
出处
《沉积与特提斯地质》
CAS
CSCD
2004年第4期59-65,共7页
Sedimentary Geology and Tethyan Geology
基金
中国地质调查局地质调查项目:"西藏林周勒青拉外围铅锌矿调查评价"(2003 001 12)
关键词
勒青拉
铅锌矿
矿田构造
西藏
Leqingla
lead-zinc deposit
orefield structure
Xizang
