吕承训, 高伟利, 张达, 苗强军, 孙月, 薛长军. 湖南花垣铅锌矿藻灰岩相层状角砾岩地质特征与矿化阶段划分[J]. 地质通报, 2020, 39(11): 1740-1751.
    引用本文: 吕承训, 高伟利, 张达, 苗强军, 孙月, 薛长军. 湖南花垣铅锌矿藻灰岩相层状角砾岩地质特征与矿化阶段划分[J]. 地质通报, 2020, 39(11): 1740-1751.
    LÜ Chengxun, GAO Weili, ZHANG Da, MIAO Qiangjun, SUN Yue, XUE Changjun. Geological characteristics and mineralization stage division of algal limestone facies stratified breccia in the Huayuan lead-zinc deposit[J]. Geological Bulletin of China, 2020, 39(11): 1740-1751.
    Citation: LÜ Chengxun, GAO Weili, ZHANG Da, MIAO Qiangjun, SUN Yue, XUE Changjun. Geological characteristics and mineralization stage division of algal limestone facies stratified breccia in the Huayuan lead-zinc deposit[J]. Geological Bulletin of China, 2020, 39(11): 1740-1751.

    湖南花垣铅锌矿藻灰岩相层状角砾岩地质特征与矿化阶段划分

    Geological characteristics and mineralization stage division of algal limestone facies stratified breccia in the Huayuan lead-zinc deposit

    • 摘要: 湘西花垣MVT型铅锌矿的资源储量巨大,成矿前景好。研究区内层状藻灰岩相是主要预测方向,矿化角砾岩是进一步找矿的重要标志,但是如何判别层状角砾岩的含矿特征尚需深入研究。通过对花垣铅锌矿进行研究,探讨角砾岩成矿过程,分析不同成矿阶段角砾岩的地质特征,根据对角砾和胶结物的观测与分析,划分了不同矿化阶段的角砾岩。①成矿前角砾岩:该类角砾岩不含矿,其中角砾与胶结物均无矿化现象出现,以似层状和条纹状角砾岩为主要类型;②成矿期角砾岩:该类角砾中含矿,其中角砾与胶结物均出现明显的矿化现象,以网脉状含矿角砾岩、斑脉状含矿角砾岩、细脉状含矿角砾岩和侵染状含矿角砾岩为主要类型;③成矿后角砾岩:该类角砾岩含少量矿化,其中角砾多有矿化现象,而胶结物无矿化或较弱矿化,以不规则网脉状角砾岩为主。角砾岩矿化阶段的判别对于构造岩相地质找矿及成矿规律研究,具有重要的参考价值。

       

      Abstract: There are huge reserves of MVT type lead-zinc deposits in west Hunan, and hence this area has good metallogenic prospect.Stratified algal limestone facies is the main prospect direction and the mineralized breccia is the key symbol for ore prospecting, but the method for distinguishing the characteristics of bedded breccia needs to be further studied.This paper mainly focuses on the study of lead-zinc deposit with the purpose of discussing the breccia mineralization process and analyzing the geological characteristics of breccia in different metallogenic stages.According to observation and analysis of breccia and cement, the breccia is divided into three different mineralization stages: ①Breccia formed prior to mineralization: this kind of breccia does not contain minerals, and there is no mineralization phenomenon in both breccia and cement.Stratoid breccia and striate breccia are the main types of this kind of breccia; ②Breccia of metallogenic stage: this kind of breccia contains mineralization in both breccia and cement.Stockwork ore-bearing breccia, porphyry veinlike ore-bearing breccia, veinlike ore-bearing breccia and disseminated ore-bearing breccia are the main types of this kind of breccia.③ Breccia of post- metallogenic: this kind of breccia contains a small amount of mineralization and most of mineralization phenomena exist in the breccia instead of in the cement.Irregular network veins breccia is the main type of this kind of breccia.The identification of the mineralization stage of breccia has important reference value for using tectonic and rock facies to study geological prospecting and regularity of mineralization.

       

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