中国地质2016，Vol.43Issue(6)：2118-2130,13.DOI:10.12029/gc20160621
河北省木吉村铜（钼）矿床蚀变分带过程中元素迁移定量分析
A quantitative discussion on element mass migration during alteration processes in the Mujicun Cu (Mo) deposit, Hebei Province
摘要
Abstract
In order to deeply study the migration regularity of element and preliminarily infer the fluid evolution during alteration processes in the Mujicun Cu (Mo) deposit, the authors tested and analyzed the samples which were respectively collected from the strongly silicified zone, the potassic zone, the quartz-sericitic zone and the propylitic zone in the ore-bearing diorite porphyrite body. Through calculation based on the formula by Grant, the authors made a tentative quantitative discussion on characteristics of the gains and losses of elements during their migration. The results demonstrate that mass migration of different elements show certain regularities within the range of mineralized alteration: (1) the initial hydrothermal fluid is rich in K and is poor in Na. Compared with least-altered rocks (the propylitic zones), the losses of Fe2O3, MgO, P2O5 and TiO2 turn into the gains in altered rocks from deep strongly silicified zone to shallow quartz-sericitic zone, with the generally opposite migration regularity of SiO2 and MnO, and FeO is depleted in the three alteration zones. (2) The migration regularity of rare earth elements is similar to that of Fe2O3 and some other components. The REE curves assume a rightly dipping REE pattern, indicating obvious fractionation between LREE and HREE, with the enrichment of LREE and the losses of HREE. (3) Cu and Mo are especially enriched in the quartz-sericitic zone and also relatively enriched in the potassic zone. These data suggest that the altitude of 400-500 m in the diorite porphyrite body is the main Cu and Mo enrichment area.关键词
幔枝构造/铜(钼)矿床/元素迁移/Grant方程/闪长玢岩/河北木吉村Key words
mantle branch structure/copper (molybdenum) deposit/element migration/Grant equation/diorite porphyrite/Mujicun in Hebei Province分类
天文与地球科学引用本文复制引用
陈超,马国玺,陈志宽,牛树银,张建珍,马宝军,张福祥,孙爱群,王宝德,张醒,张浩亮..河北省木吉村铜（钼）矿床蚀变分带过程中元素迁移定量分析[J].中国地质,2016,43(6):2118-2130,13.基金项目
国家自然科学基金(40872137)、河北省自然基金（D2015403013、D2013403018）、危机矿山项目（20109901、20089948）、河北地质大学博士基金（BQ201320）和河北省教育项目（ZC2016060）联合资助。 （40872137）
