摘要
海底热液矿床具有重要的经济价值和科学意义。其产出构造背景包括洋中脊、弧后扩张中心及板内热点处。处于不同构造环境的热液矿床具有不同的地质和地球化学特点。系统总结了海底热液矿床产出的地质和地球化学特点,主要包括热液矿床产出的构造背景、围岩类型、矿区的矿物及矿物组合特点以及不同热液区矿床的元素组成、稀土和硫同位素特点等,对各构造环境中热液矿床的特点进行了对比,指出不同热液区热液矿床地质和地球化学特点差异的根本原因在于所处构造环境的不同和扩张速率的差异。文章最后提出了今后应着重研究的几个问题。
Seafloor hydrothermal polymetallic deposits are of important value in science and economy. A series of polymetallic deposits have been found in such environments as mid-oceanic ridges, back-arc spreading centers or rift zones. Hydrothermal polymetallic deposits in different geologic settings have different geological and geochemical characteristics, mainly including tectonic setting, ore-bearing structure, wall-rock type, combination of mineral, element composition of ore/wall-rock, rare-element and isotope characteristics of ore/hydrothermal sediments, etc. On this basis, it was pointed out that tectonic setting and spreading speed are primary factors which result in different characteristics of hydrothermal polymetallic deposits. Some problems are put forward at the end of the paper, which should be paid more attention in later studies.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2006年第2期79-84,共6页
Journal of Tropical Oceanography
基金
大洋课题"富钴结壳调查区海山构造地貌特征及其对富钴结壳成矿的控制作用"(DY105-01-01-02)
关键词
海底热液矿床
构造背景
大洋中脊
弧后扩张中心
扩张速率
sea floor hydrothermal polymetallic deposit
geologic setting
mid-oceanic ridge
back-arc spreading center
spreading speed
