白山市大横路铜钴矿区含矿岩系大栗子组原岩性质及沉积环境地球学特征

The primary rock nature of the Dalizi Formation of ore-bearing rock series in the Dahenglu Cu-Co mining area, Baishan area, Jilin province and its sedimentary environmental geochemical characteristics

白山市大横路铜钴矿区经过多年的地质勘探、控矿构造研究 ,认为该矿床属沉积变质型 ,层控比较明显。为了更深入地研究该矿床形成的地质条件 ,有必要对矿区含矿岩系原岩性质、沉积物来源、沉积环境等各方面进行更深入的研究。本文从岩石化学、微量元素地球化学、稀土元素地球化学等方面 ,分别进行了讨论。通过元素地球化学特征所反映的信息 ,来正确认识矿区内大栗子组原岩性质、沉积物来源、沉积环境等。

Through many years geological prospecting and research on ore-control structure of the Dahenglu Cu-Co mining area, Baishan area, Jilin province, it is considered that the deposit belongs to a sedimentary metamorphic type with obvious stratabound character. To research further the geologic condition formed by the deposit, it is necessary to make a thorough study to the primary rock nature of the ore-bearing rock series in the mining area, source of sediment and the sedimentary environment. In this paper, the lithochemistry, microelement geochemistry and rare earth element (REE) geochemistry are respectively discussed. Through the analysis on element geochemical characteristics, we have determined primary rock nature of the Dalizi Formation, source of sediment and its sedimentary environment.