我国主要金矿类型中黄铁矿电子-空穴心特征及影响因素

通过对我国主要金矿类型中黄铁矿导电类型的分析表明,黄铁矿“电子。空穴心”与金矿床的成因类型具有密切的联系,华北地台太古代变基性火山岩中的金矿床(绿岩带型)、热水淋滤型(卡林型)金矿床,黄铁矿多为单一的“电子心”型导电。大多数产于中生代岩体中的中深脉状金矿、火山次火山岩中的金矿床,黄铁矿为“电子心”、“空穴心”混合型导电,个别的为单一的“空穴心”导电。黄铁矿的“电子．空穴心”受杂质成分As、Co、Nl在成矿背景中的丰度,进入黄铁矿品格中的替代能力的差异、补偿类质同象现象、成矿时温度以及．f(S2)等多种因素的耦合制约。

ELECTRON HOLE-CORE CHARACTERISTICS OF PYRITES FROM THE MAIN TYPES OF GOLD DEPOSITS IN CHINA AND AFFECTING FACTORS

Studies on pyroelectricity types of pyrites from the main gold deposit types in China, indicated that the electron hole-core characteristics are closely related to the genetic types of gold deposits. The pyrites from gold deposits hosted in Archaeozoic meta-basic volcanic rocks in the North China platform and thermal water leached-type (Carlin-type) gold deposits are characterized by simple N-type electric conductivity. Most of the pyrites from Mesozoic vein gold deposits and gold deposits hosted in volcanic and sub-volcanic rocks belong to the mixed type of N-type and P-type electric conductivity except a few belonging to simple N-type. Factors affecting the electric conductivity type of pyrites can be ascribed to the abundance of impurities such as As,Co and Ni, difference in amounts of iron entering pyrite lattice and replacing ability , compensation isomorphism, temperature and f_(S_2).