Cd occurrence status and its enrichment characteristics of the sphalerite in lead-zinc deposits, eastern Beihuaiyang district

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Sept.2024, Vol.47 No.9: 1213-1223

DOI: 10.3969/j.issn.1003-5060.2024.09.009

Authors

WU Xiaorong $ ^{1,2} $, ZHANG Dayu $ ^{1} $, BAI Ruyu $ ^{3} $, JIANG Zhongren $ ^{1} $, ZHANG Fei $ ^{1} $, WAN Qiu $ ^{2} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Bureau of Geology and Mineral Exploration of Anhui Province, Hefei 230001, China; 3. Geological Survey of Anhui Province, Hefei 230001, China)

Abstract and Keywords

Abstract: This paper studied Cd occurrence status and its enrichment characteristics of the sphalerite from the typical lead-zinc deposits in the eastern section of Beihuaiyang district based on the petrographic observation and EPMA analysis. The results show that Cd resource is mainly occurred within sphalerite, with a small amount occurring in galena and pyrite. The mass fraction of Cd in sphalerite is negatively related with Zn, indicating that Cd replaces Zn in an isomorphic manner and enters the lattice of sphalerite. The statistic results suggest that there is no significant relationship between Cd enrichment in sphalerite grains and their colors. In the eastern Beihuaiyang district, the Cd enrichment of sphalerite in the lead-zinc deposits exhibits a descending trend from the explosive breccia type (Gongdongchong) to the skarn type (Yinshuisi), and then to the low-temperature hydrothermal type (Yinchong) deposits.

Keywords: lead-zinc deposits; Cd; occurrence status; enrichment pattern; eastern Beihuaiyang district

作者信息

吴小荣 $ ^{1,2} $，张达玉 $ ^{1} $，白茹玉 $ ^{3} $，姜重任 $ ^{1} $，张飞 $ ^{1} $，万秋 $ ^{2} $

（1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 安徽省地质矿产勘查局，安徽合肥 230001；3. 安徽省地质调查院，安徽合肥 230001）

摘要和关键词

摘要: 文章利用电子探针分析手段, 对北淮阳东段典型铅锌矿床中 Cd 的赋存状态和富集特征进行了分析研究。结果表明, 北淮阳东段铅锌矿床中分散元素 Cd 主要赋存在闪锌矿中, 少量赋存于方铅矿、黄铁矿等硫化物矿物, 且闪锌矿中的 Cd 质量分数与 Zn 质量分数成反比关系, 表明 Cd 是以类质同象方式置换 Zn 而进入闪锌矿晶格中。北淮阳东段典型铅锌矿床中不同颜色闪锌矿与 Cd 质量分数的关系研究显示, Cd 富集与闪锌矿颜色无明显关系。研究发现北淮阳东段铅锌矿床中闪锌矿 Cd 质量分数的富集程度从大到小依次为隐爆角砾岩型(汞洞冲)、矽卡岩型(银水寺)、热液交代充填型(银冲)。

关键词: 铅锌矿床；Cd；赋存状态；富集规律；北淮阳东段

Funding

国家自然科学基金资助项目（41972076）；安徽省自然资源厅科技资助项目（2021-K-9；2023-K-17）和安徽省公益性地质工作资助项目（2021-g-2-11）

合肥工业大学学报(自然科学版)

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