摘要
巍山锑、汞多金属矿带处于滇西板块构造边缘带,岩浆活动和构造运动均较强烈。其地质和地球化学特征与我国某些层控矿床不尽相同。作者通过矿源层、微量元素比值、包裹体等数据分析,提出它们的成矿金属元素Sb、Hg主要来自成矿前形成的基性岩体,经搬运而富集成矿。
As a plate margin, the Weishan antimony, mercury multiple-metal ore zone is located in the western part of Yunnan, with many lines of evidence for strong regional tectonism and magmatism. Their geological and geochemical characteristics are quite different from those of some strata-bound antimony and mercury deposits contained in stable innerplate areas.This paper presents the background levels of ore-forming elements such as Sb and Hg in the strata, the trace element ratios (Sr/Na, Cr/Ni, Mo/W, Th/U) in ores, inclusion characteristics. All this goes to show that the ore-forming elements of these ores were from the pre-ore intrusive rockbodies. The formation mechanism of the ores can be interpreted by such a process that the ore-forming elements Sb and Hg were first activated as a result of the circulation of heated meteoric waters and then transported to the favourable loci where the metals were concentrated and precipitated as metallic ores.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第4期399-405,共7页
Geochimica
