四川呷村多金属矿床成因矿物学研究

呷村矿床是典型的“黑矿型”含金、稀土富银多金属矿床.笔者对黄铁矿、闪锌矿、方铝矿、黝铜矿等主要矿物的物理性质、光学性质和化学成分作了系统研究.研究表明:①矿石的矿物种类繁多,含稀土的矿物具有特殊意义;②黄铁矿的结构为探讨该矿床的成矿环境和矿床成因提供了重要信息;③矿物性质的变化主要与微量元素含量和成矿物理化学条件有关;④矿物微量元素含量在矿区空间变化的规律对找矿与勘探具有指导意义;⑤方铅矿不是载Ag矿物.黄铁矿Co、Ni含量并不高,Co/Ni<1,这些是本矿床的独特之处.

STUDIES OF GENETIC MINERALOGY OF GACUN POLYMETALLIC DEPOSIT, SICHUAN

The Gacun ore deposit is a typical "Kuroko-type" auriferous and silver-rich polymetallic deposit. Based on the systematic studies of physical and optical properties and chemical compositions of the major minerals, such as pyrite, sphalerite, galena and tetrahedrite-group minerals in the deposit, it is shown that: 1) there are great varieties of ore minerals, REE-bearing minerals have particular significance. 2) the texture of pyrite may provides some important information about the metallogenic conditions and genesis of the deposit. 3) the properties of minerals are relative to the contents of trace elements and the metallgenic conditions of physical chemistry. 4) the regularity of the space variation of the trace element contents in ore minerals has the significance in prospecting. 5) it is characterized that galena is not the carrier mineral of silver and the Co, Ni contents of pyrite are not high and Co / Ni < 1.