金家庄超基性岩型金矿蚀变矿化过程中物质组分变化定量研究

金家庄金矿围岩蚀变主要为蛇纹石化－滑石化、碳酸盐化，绿泥石化及硅化。根据不同蚀变程度透辉岩化学成分与微量元素组分得失定量计算，ＳｉＯ２，ＣａＯ，Ａｌ２Ｏ，Ｎａ２Ｏ和ＣＯ，Ｃｒ，Ｐｂ等在各类蚀变透岩中明显亏损，在矿化蚀变岩和含金石英细中显著富集；ＣＯ２，Ｈ２Ｏ，Ｓ和Ａｕ，Ｃｕ在各类蚀变－矿化石中均显富集；ＴｉＯ２，ＭｇＯ，Ｖ，Ｓｒ及Ｐｒ表现为相对“惰性”。ＳｉＯ２，ＣａＯ，Ａｌ２Ｏ３等物质组分得失变

QUANTITATIVE STUDIES ON MASS CHANGE DURING ALTERATION AND MINERALIZATION PROCESSES IN THE JINJIAZHUANG ULTRABASIC ROCK-TYPE GOLD DEPOSIT

Wall rock alteration associated with the Jinjiazhuang gold ore deposit is dominanted by, serpentinization talcization, carbonatization, chloritization and silicification. On the basis of the calculation of the gains and losses of major and minor elements in various altered diopsidites, SiO 2,Ca,Al 2O 3,Na 2O,CO,Cr and Pb are obviously depleted in various types of altered diopsidites, and are remarkably concentrated in mineralized altered rock and auriferous quartz veinlets; CO 2,H 2O S,Au and Cu are concentrated in the all altered and mineralized rocks mentioned above; Ti 2O,MgO,V,Sr and Pr show inertia compared to the others. The gains and losses of SiO 2,CaO,Al 2O 3 reflect that the components may have been redistributed within source rocks ultrabasic rocks during the wall rock alteration, with CO 2 rich fluids of meteoric origin reacted with the source rocks ultrabasic rocks.