豫西金矿地质特征与构造控矿探讨
Discussion on Geologic Characteristics and Structural Ore-Control of the Gold Deposits in Western Henan
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摘要: 豫西地区是国家重点金多金属成矿区带,成矿地质条件优越,区内金及多金属矿类型多样。通过对研究区地质特征及成矿地质条件的分析,得出区内金及多金属矿矿床形成受多重因素控制,包括地层、构造以及岩浆岩因素,并且在这些因素中,构造控矿占主导。在此基础上,将研究区内金矿矿床类型分为构造蚀变岩型金矿床、构造破碎带型金矿床、斑岩型金矿床以及爆破角砾岩筒型金矿床4种类型,并对每一种类型选取1个典型的矿床进行具体讲述。依据对研究区成矿地质特征以及5种构造控矿类型的叙述,论述了拆离-变质核杂岩构造对金矿成矿的构造控矿作用和构造控矿规律,并根据该区金矿矿床成矿规律,提出选取找矿靶区的8项依据,最后优选出7处找矿有利靶区。
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关键词:
- 金矿 /
- 拆离-变质核杂岩构造 /
- 构造控矿 /
- 豫西
Abstract: The west of Henan province is an important gold polymetallic mineralization belt of China. The region has favorable ore-forming geological conditions and various types of gold polymetallic deposit. According to the analysis of geological characteristics and ore-forming geological conditions in this area, gold polymetallic deposits in the west of Henan province are controlled by multiple factors, mainly including strata, structures and magmatic rocks, among which structures are the dominant factors. On this basis, gold deposits inside researching area can be divided into altered fracture zone type, altered rock zone type, porphyry type, explosion breccia type. A typical ore deposit is selected from each type for analysis. According to the geologic characteristics of the gold deposits and five types of structural ore-control, this paper discussed the influence of detachment-metamorphic core complexes on structural ore-control and metallogenic regularity of the gold deposit mineralization. According to the mineralization regulations of gold deposits in researching area, eight indicators are proposed to select prospecting targets. Then, seven favorable prospecting targets are optimally selected. -
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