【摘要】 小红石砬子铅锌矿床在大地构造位置处于华北板块北缘东段。矿区出露地层为一套中酸性火山岩,通过锆石U-Pb定年确定赋矿岩石安山质凝灰岩的形成时代为(227.1±2.1)Ma,与吉林中部地区晚三叠世火山事件相对应;该矿床的成岩与成矿与晚三叠世火山事件密切相关。更多还原

【Abstract】 Xiaohongshilazi depositi is located in the accretion zone of northern margin of North China Block. The exposed strata in the deposit is a set of intermediate acid volcanic rocks. Zircon U-Pb dating shows that the formation age of andesitic tuff( the ore-hosting strata) is( 227. 1 ± 2. 1) Ma,that is correspond to the late triassic volcanic events. The diagenesis and mineralization of the deposit will be closely related to the late triassic volcanic events.更多还原