岩矿测试2025，Vol.44Issue(2)：214-229,16.DOI:10.15898/j.ykcs.202406210138
扬子地块西南缘乌斯河富锗闪锌矿矿物标型特征与锗的替代机制
Mineral Typomorphic Characteristics and Deposit Genesis of Germanium-Enriched Sphalerite from Wusihe in the Southwestern Margin of the Yangtze Block
摘要
Abstract
The Wusihe lead-zinc deposit,situated at the southwestern margin of the Yangtze Block and a prominent Ge-enriched deposit within the Sichuan—Yunnan—Guizhou lead-zinc metallogenic belt,faces ongoing debates regarding its genesis.The influence of sphalerite typomorphic characteristics on Ge enrichment and substitution mechanisms within the deposit remains a crucial puzzle to unravel.To address this,the paper employs quantitative analyses using microscopic spectrophotometry and laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS).The results reveal the presence of two sphalerite stages during the hydrothermal period:a darker Stage Ⅰand a lighter Stage Ⅱ.Despite similar mean values for visual reflectance and the dominant wavelength of reflectance color,the mean reflectance color saturation differs(0.048 and 0.043,respectively),with corresponding average Ge contents of 244.33×10-6µg/g and 43.22×10-6µg/g,respectively.The experimental outcomes conclude that Ge exists in sphalerite as isomorphism and is more concentrated in sphalerite with higher reflectance color saturation.The ore-forming temperature is medium to low,classifying the deposit as a Mississippi Valley-type lead-zinc deposit.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202406210138.关键词
富锗铅锌矿床/闪锌矿标形特征/替代机制/显微分光光度计/激光剥蚀电感耦合等离子体质谱/类质同象/密西西比河谷型铅锌矿床Key words
Ge-enriched lead zinc deposit/characteristics of sphalerite morphology/substitution mechanisms/microscopic spectrophotometer/laser ablation-inductively coupled plasma-mass spectrometry/isomorphism/Mississippi Valley-type lead-zinc deposit分类
地质学引用本文复制引用
孙世强,辜鹰,陈翠华,赵文皓,赖翔,马天祺,张海军,乔梦怡,宋志娇,陈宵杰..扬子地块西南缘乌斯河富锗闪锌矿矿物标型特征与锗的替代机制[J].岩矿测试,2025,44(2):214-229,16.基金项目
四川省科技厅自然科学基金项目"四川汉源乌斯河铅锌矿床闪锌矿中关键金属锗的富集机制及成因矿物学找矿标志"(2023NSFSC0274) （2023NSFSC0274）
