Preliminary Study on Composition of Phosphate Nodule in Lower Cambrian Black-Rock-Series-Hosted Ni-Mo Deposits in Hunan-Guizhou Area
- 责任者：Jiang Yonghong (Development and Research Center of China Geological Survey ; Beijing 100037 ; China)
- 刊名：Contributions to Geology and Mineral Resources Research
- 出版年：2010
- 卷期：25(1)
- 关键词：镍矿 ; nickel ores ; 钼矿 ; molybdenum ores ; 湖南 ; Hunan Province ; 贵州 ; Guizhou Province
- 页码：p.12-17
- 图表：3 illus，3 tables, 13 refs.
- 分类号：1001
- issnNo：ISSN1001-1412
- isbnNo：CN12-1131/P
Composition of phosphate nodule in Lower Cambrian black-rock-series-hosted Ni-Mo deposits in Hunan-Guizhou area is analyzed by electronic probe. Analytical result of twenty apatite samples shows Ca/P ratio in range of 1. 36～1. 710 and the average of 1. 605 and the apatite belongs to bio-chemically deposited hydroxylapatite. Content of Na+, Fe2+, Al3+, La3+, Sm3+, Ce+, Cr3+, Ti4+ is relatively higher in the nodule with various element combinations, such as Na+ and LREE. On the 1/4 cross section of the phosphate nodule, two nucleis and single nuclei of sedimentary center exist with irregular lamina structure. From the rim to the center of the phosphate nodule parameter of the relative active noble metal elements and relative inert (Pd/Pt, Ag/Au, TD/SUHR) change in the same tendency.