岩金矿床（Rock gold deposit）.docVIP

岩金矿床（Rock gold deposit） Rock gold deposit 1. the stratabound characteristics of gold mineralization in China 1) most of the rock gold deposits are found in a particular ore bearing formation in a certain tectonic setting. The ore deposits (spots) are densely distributed and clumped into zones, and their extension is consistent with the occurrence of strata. 2) the gold bearing abundance of mineralized surrounding rock is often several times to several times larger than that of similar rock in the crust. 3) the isotopic assemblage characteristics of most gold deposits are similar to those of surrounding rocks. Such as Henan Province, the small Qinling Mountains area of Wenyu Gold Deposit, ore sulfur isotope 34S was 1.35 per thousand, Yangzhaiyu mining sulfur isotope 34S was 1.55 per thousand, Jindong mine sulfur isotope 34S cha - 3.58 per thousand, 3.39 per thousand and two strata Delta 34S, showed similar characteristics and formation of sulfur sulfur ore. This indicates that ore deposits are often the source beds. 4) the formation of Chinas rock gold deposits is mainly composed of ancient Proterozoic, followed by Proterozoic, Paleozoic and Mesozoic gold deposits, but the extent of development varies. There are metamorphic rocks, sedimentary rocks and igneous rocks in mineralized surrounding rocks, and their mineralization is different. The layer control of the major mineralized concentrated areas is outlined below: (1) domain platform gold mineralization of gold deposits in this area (North Point) uplift area concentrated on the edge of the plate and the basement structure, and is mainly produced in the Archean metamorphic crystalline basement in. (1) the gold deposits in the concentrated area of Yanshan gold deposit are concentrated in Shanhaiguan and Miyun uplift area, and the ore bearing strata are Ma Lan group of Archean Qianxi group. This group has a great influence on mixing. The gold bearing abundance of strata is 0.7 to 0.83 * 10-6, which is 25~200 times hi