高校地质学报2017，Vol.23Issue(4)：563-574,12.DOI:10.16108/j.issn1006-7493.2016195
滇东北会泽超大型铅锌矿床矿质来源与改造成矿作用
Ore-forming Material Sources and Sedimentary-reworked Metallization of Huize Super-large Lead-Zine Deposits in Northeastern Yunnan, China
摘要
Abstract
The theory of reworked metallization is a new theory to optimize the quartering method of genetic classification of mineral deposits. It is proposed by Chinese scientist Prof. Tu Guangzhi, and is a great contribution to earth sciences in the world from Chinese scholar. This article applies the theory of reworked metallization to examine the genesis of Huize super large Pb-Zn deposit. Based on the geological and geochemical characteristics, we suggest that it is a typical and special sedimentary-strongly reworked deposit. On the basis of macroscopic phenomena, there are no significant Pb-Zn deposits in the Emeishan Basalts (260 Ma) and Kunyang folded basement. It is believed that basalts and basement cannot provide the ore-forming material sources. Meanwhile, the metallogenetic fault cuts through the basalts, indicating that basalts formed prior to metallization and basaltic magma is not the mineralization factor. There are various opinions on the ore genesis and ore-forming material sources, such as strata source, basement source, basalt source, and multi-source. However, so far there is still no deep insight into the primary source of the ore-forming material, and it is controversial whether multi-metals have unique source. In this paper, we systemically calculate and analyze the content, enrichment coefficient, and enrichment type of ore-forming elements in the strata, basement, and Emeishan basalt to discuss the possible sources of all kinds of ore-forming metals and estimate its contribution to the mineralization. Results show that Silver is high in geological units everywhere, Pb comes second;while on the contrast, Zn, Ge, Ga, and In are normal or depleted elements. So the Zn, Ge, Ga, and In of the ore are more likely come from the deep. Based on the geochemical data of trace and rare earth elements, Pb, S, Sr, C, H, O isotopes, we conclude that the Z, , D, C strata and deep are the main ore-forming material sources and multi-metals may have same or different sources. The deposit is controlled by stratigraphic lithology and tectonics, but has no direct relationship with magma. The deposit shows features of reworked metallization and belongs to the strongly reworked sedimentary deposit which is characterized by very high grade of the ore, more associated metals, and super-large size. The stratified ore-bodies or source bed formed in Hercynian, and abnormal enrichment occurred during the later Indosinian movement. We called it"Huizetype"sedimentary-reworked deposit.关键词
改造成矿作用/会泽超大型铅锌矿床/峨眉山玄武岩/成矿物质来源Key words
reworked metallization/Huize super large lead-zine deposits/Emeishan basalts/ore-forming material分类
天文与地球科学引用本文复制引用
冉崇英..滇东北会泽超大型铅锌矿床矿质来源与改造成矿作用[J].高校地质学报,2017,23(4):563-574,12.基金项目
国家自然科学基金(41102049) （41102049）
西南地区层控型多金属矿床成矿规律总结研究(20089943)联合资助 （20089943）
