成矿构造的基本问题
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本文为广西自然科学基金项目(桂科自0832251)资助的成果。


Elementary Issues of Metallotectonics
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    摘要:

    基于对成矿构造的重新定义,建立起矿床学中相关构造术语的概念谱系,认为成矿构造是指:控制矿体几何形态、具有独立自然边界、为矿质直接充填或交代的地质构造单元。基于成矿构造单元的概念,认为成矿构造系列是指:同一构造体制下或某种特殊地质作用过程中形成的、相互联系的一套成矿构造单元的总和,并将成矿构造系列划分为十大类型。成矿构造可分为二类,一类是以构造动力破坏(构造致裂)为主形成的成矿构造——简称构造型成矿构造;另一类是以流体动力破坏(流体致裂)为主形成的成矿构造——简称流体型成矿构造。基于成矿构造的结构,可将上述两类成矿构造各划分为四种亚类型:角砾岩型、脉型、细脉型与蚀变岩型。比较了二类成矿构造中对应的成矿构造类型的差别。提出断裂构造系统中流体型成矿构造一般只发育于弱应变域(Q域)中,构造型成矿构造一般只发育于强应变带(P域)中。讨论了形变类型、成矿构造类型与矿化类型三者之间的关系,指出成矿构造类型与矿化类型具有一一对应的成因联系。

    Abstract:

    Based on the redefinition of metallotectonics, the concept system of the correlative tectonic nomenclatures of deposit was established. It is suggested that the metallotectonics refers to the geological structural units, which control the geometric configuration of orebodies, have independent natural boundary and are filled or metasomatized by orebearing substance. Based on the concept of metallotectonical unit, it is suggested that the metallotectonical series is an integration of a suit of correlative metallotectonical units forming under the same tectonic regime or some unique geologic process. The metallotectonics can be further classified into two types: the tectotype metallotectonics (tecto fracturing) resulted from the tectonic dynamic, and the hydrotype metallotectonics (fluid fracturing) from the effect of hydrokinetic force. Based on the configuration of metallotectonics, two metallotectonics mentioned above could be classified into four subtypes: brecciatype,veintype, netted veintype and disseminated type, respectively. The comparison of the differences of two metallotectonics types indicates in this study that the hydrothermaltype metallotectonics in faulting system formed commonly in the weakly deformed domains (Q domains), while the tectotype metallotectonics developed mainly in the strongly deformed belts (Pdomains). This study also discusses the relations among the deformation type, metallotectonical type and mineralization type, and indicates the existence of corresponding genetic relationship between metallotectonics and mineralization.

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汪劲草.2010.成矿构造的基本问题[J].地质学报,84(1):59-69.
WANG Jincao.2010. Elementary Issues of Metallotectonics[J]. Acta Geologica Sinica,84(1):59-69.

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  • 收稿日期:2008-04-12
  • 最后修改日期:2009-03-15
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