摘要
金达整装勘查区位于冈底斯成矿带东部,铅锌矿资源丰富.从矿床成因类型、时空分布、控矿因素等方面分析了金达地区铅锌矿的成矿规律.研究表明:金达整装勘查区铅锌矿可划分为4条大的成矿带,即嘉黎推覆构造成矿带、唐古-巴嘎复背斜轴部成矿带、松北推覆构造成矿带、松南双重推覆构造成矿带;区内铅锌矿成因类型主要为岩浆热液型和矽卡岩型两种,成矿期可划为早白垩纪、古近纪、新近纪三个成矿期次,古近纪、新近纪是铅锌成矿的高峰期;金达地区铅锌成矿受控于地层、区域构造、中酸性侵入岩等多种因素.
Abstract
The Jinda integrated exploration area is located in the eastern part of the Gangdise metallogenic belt,with abundant lead-zinc mineral resources.The ore-forming laws of lead-zinc deposits in Jinda area were analyzed from the aspects of ore genesis types,spatiotemporal distribution,and ore controlling factors.Research has shown that the lead zinc deposit in the Jinda integrated exploration area can be divided into four major mineralization zones:the Jiali thrust structure mineralization zone,the Tanggu Baga anticline axis mineralization zone,the Songbei thrust structure mineralization zone,and the Songnan dual thrust structure mineralization zone.The main genetic types of lead zinc deposits in the area are magmatic hydrothermal type and skarn type.The mineralization period can be divided into three periods:Early Cretaceous,Paleogene,and Neogene.The Paleogene and Neogene are the peak periods of lead zinc mineralization.The lead-zinc mineralization in the Jinda area is controlled by various factors such as stratigraphy,regional structure,and intermediate acidic intrusive rocks.
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