【摘要】 广西东桃铅锌矿床是博白—岑溪铅锌多金属成矿带中一个具有代表性的矿床。通过矿床构造的研究 ,识别出早期逆冲推覆和晚期顺层剪切滑脱破碎带两套构造系统 ,区内晚期热液成矿作用 (主成矿期 )主要受早期逆冲推覆构造面及晚期奥陶系地层中的层内伸展剪切构造所控制。 Sm-Nd及 Rb-Sr同位素年代学研究表明 ,早期逆冲推覆作用发生在加里东期 [( 4 2 6± 15 ) Ma] ,晚期层内伸展剪切及热液成矿作用发生在燕山早期 [( 15 2± 3 ) Ma]。更多还原

【Abstract】 Dongtao lead-zinc deposit is a representative deposit of Bobai-Cenxi metallogenetic belt,located in Guangxi. Based on the research of ore-controlling structure features, two structure systems of early nappe structure and later stretch slide structure have been identified. Later hydrothermal metallizaton(major metallization stage) is controlled by the nappe structure and the stretch slid structure. Study on Sm-Nd and Rb-Sr isotopic geochronology indicates the nappe structure was formed during Caledonian[(426±15)Ma], and the stretch slide structure and hydrothermal metallization were formed during early Yenshan movement[(152±3)Ma].更多还原