摘要
中国祖母绿 ,产于南温河变质核杂岩的变质内核中 ,含矿构造有两种 :一为长英质伟晶岩脉 ,一为顺面理产生的石英脉。后者所产祖母绿质量较好 ,是祖母绿的主要含矿构造。经研究 ,构成祖母绿的主要元素Be ,主要来自燕山期花岗斑岩 ,而致色元素Cr和V主要来源于元古界变粒岩。矿区外围仍有很好的找矿远景 ,找矿靶区应选在变质核杂岩内核中的元古界层状变质岩系。
The China emerald is occurred in the metamorphic core of the Nanwen River metamorphic complex. The ore-bearing structures consist of felsic pegmatite vein and quartz vein along schistosity. And the quality of the emerald occurred in the latter ,is better, which is the main ore-bearing structure of the emerald. According to the study, the main element Be of emerald is derived mostly from Yanshanian granite-prophyry whereas the coloring elements Cr and V are mostly from the Proterozoic granulite. The prospecting potentiality is good as well outside the ore-field. And the prospecting target must be selected in the Proterozoic bedded metamophic rock series of the metamorphic core.
出处
《云南地质》
2000年第1期37-42,共6页
Yunnan Geology
