- 责任者：Fu Zhiguo (No.2 Geoexploration Party of Henan Bureau of Geoexploration and Mineral Development ; Xuchang 461000 ; China) ; Zheng Hongxing
- 刊名：Geology and Prospecting
- 出版年：2009
- 卷期：45(2)
- 关键词：金矿 ; gold ores ; 标型矿物 ; typomorphic minerals ; 河南 ; Henan Province ; 陕西 ; Shaanxi Province
- 页码：p.53-59
- 图表：1 illus., 12 tables, 16 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
On the base of the description to the typomorphic characteristics of ore minerals in Xiaoqingling-Xiongershan gold deposits, three points have been concluded in this paper: 1) crystal shapes of pyrite vary in different mineralization stages. In the early and late periods, pyrite mainly occurs as cubic, but during the middle period, its pyrithohedron and twinning are presented; 2) typomorphic characteristic of the precious metal minerals is existed in different mineralization stages or deposit types. The native gold grains are scattered mainly in the quartz-vein type gold deposits, in contrast electrum is mostly distributed in the altered-rock type deposits; and 3) the purity of gold is different. Native gold in Xiaoqingling area is with high quality, and average fineness of the gold is between 844~937, but the gold produced in Xiongershan Mountain has a poor purity mostly as associated electrum and telluride, average fineness is between 813~914. Therefore high temperature leads to the high quality of gold, vice versa the low to the poor.