吉林省太古宙地体中硫化铜镍矿床的成矿规律概论

ORE-FORMING REGULARITY OF THE COPPER AND NICKEL SULPHIDE DEPOSITS IN THE ARCHEAN TERRAIN IN JILIN PROVINCE

本文通过深入研究,概述了太古宙地体中硫化铜镍矿床在时间、空间与物质组份上的分布规律,阐述了成岩成矿物质来源,成矿作用以及矿床在地球化学、岩石化学、矿物学等方面的规律性特点和控制成矿的内在、外在因素等,以供成矿预测或普查找矿工作参考。

Four aspects are discussed in this paper. I, Brief review on outline of geological work of nickel deposits in 30years. Geological work of the nickel deposits is divided into three stages. 1) The first breakthrough of searching for nickel deposits was made in the geosyncline area; numbers of nickel deposits were found, and the reserves and production of nickel in Jilin province occupy the front rank in China. 2) The second breakthrough for searching for nickel in the platform was made, and the medium size Chibansong Cu-Ni sulphide deposit was found. 3) Overall breakthrough was made on both sides of juncture of geosyncline and platform areas. Except for some ore deposits found, nickel metallogenic zone of Jilin province was delineated, meanwhile, the prognosis of total reserves of nickel and regional planning were made. Ⅱ, Describing the basic characteristics of two metallogenic subzones of nickel-E-W metallogenic subzone of marginal mobile belt in the Jilin Fold System, and the Longgang continental nucleus (shield) . Ⅲ, Based upon geology, mineralogy, petrology, petrochemistry, genetic mineralogy and genesis of deposit, five typical large-and medium-size deposits (Hongqiling No.1, No.7, Piaohechuan No. 4, Changren No.6, and Chibansong No.1) are described in the above-mentioned two metallogenic subzones, providing a basis for comprehensive study of the metallogenic regularities. Ⅳ, Comprehensive study on the diagenetic and metallogenic regularities of Cu-Ni sulphide deposit in Jilin province(including diagenetic and metallogenic epoch , spatial distribution of ore bodies and the diagenetic and metallogenic components, of which metallogeny of plutonic injection of ore magmais emphatically described.). Finally, genetic model of the Cu-Ni sulphide deposits is proposed.