| 艾金彪,吕杜,张庆松,王能,朱派彬,杨光树,王礼兵.万龙山锌锡矿床原生晕地球化学分带及其深部找矿意义[J].矿产勘查,2026,17(8):1464-1478 |
| 万龙山锌锡矿床原生晕地球化学分带及其深部找矿意义 |
| Geochemical zoning of primary halos and its implications for deep exploration at the Wanlongshan Zn-Sn deposit |
| 投稿时间：2025-12-08 |
| DOI：10.20008/j.kckc.202608013 |
| 中文关键词: 万龙山矿床 锌锡矿床 矽卡岩 原生晕 元素聚类 分带指数 k 深部找矿 |
| 英文关键词: Wanlongshan deposit zinc-tin deposit skarn primary halo element clustering zoning index k deep prospecting |
| 基金项目:本文受国家自然科学基金项目(42472125)、原四川省冶金地质勘查局重点科研项目(〔2016〕196号)和万龙山商业地勘重点找矿勘探项目(〔2016〕院01号)联合资助。 |
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| 中文摘要: |
| 万龙山锌锡矿床位于滇东南都龙矿田，是典型的花岗岩相关矽卡岩型矿床。本文开展了系统的矿床地质调查与矽卡岩及金属矿物的成因矿物学研究，并对 13个钻孔 556件组合样进行了原生晕地球化学分析。在此基础上，厘清了矿床的矿物组合演化过程，建立了原生晕分带结构，并构建了深部找矿预测模型。成因矿物学表明，矿床经历干矽卡岩、湿矽卡岩、氧化物-早期硫化物和晚期硫化物 4个阶段，其中晚期硫化物阶段铁闪锌矿广泛发育，代表主成矿期。原生晕地球化学揭示出清晰的轴向分带序列:深部及岩体接触带附近发育 W-Bi-Mo高温前缘晕，中部矽卡岩带形成 Zn-Sn-Cu-Ag-As近矿晕，上盘及外围围岩中出现 Pb-Sb-Hg低温尾晕。平面分带整体呈北强南弱特征，与隐伏花岗岩体南倾形态及 F0～F1控矿断裂系统具有良好对应关系。在此基础上，构建了分带指数 k，用于定量表征高温端与低温端原生晕的相对贡献。k高值区主要集中于 19～04线附近，指示该区深部可能存在富 Sn-Cu的隐伏矿化中心。研究成果可为滇东南及类似矽卡岩型锌锡矿床的深部找矿提供方法学参考。 |
| 英文摘要: |
| The Wanlongshan Zn-Sn deposit, located in the Dulong orefield of southeastern Yunnan, is a typi.cal granite-related skarn-type deposit. Based on systematic geological investigation, genetic mineralogical studies,and primary halo geochemical analysis of 556 composite samples from 13 drill holes, this study clarifies the evolu.tion of mineralization stages, establishes the primary halo zoning pattern, and proposes a quantitative indicator fordeep exploration. Genetic mineralogy indicates that the deposit experienced four stages, including prograde skarn,retrograde skarn, oxide-early sulfide, and late sulfide stages, with marmatite widely developed during the late sul.fide stage, representing the main mineralization period. Primary halo geochemistry reveals a distinct axial zoning se.quence, characterized by a high-temperature W-Bi-Mo front halo near the concealed intrusion and its contactzone, a Zn-Sn-Cu-Ag-As proximal ore-forming halo in the central skarn zone, and a low-temperature Pb-Sb-Hgtail halo in the hanging wall and peripheral host rocks. Lateral zoning exhibits a pronounced north-strong andsouth-weak pattern, which is consistent with the south-dipping geometry of the concealed granite body and the F0-F1 ore-controlling fault system. On this basis, a zoning index k is constructed to quantitatively evaluate the relative contributions of high-and low-temperature halos. High k values are mainly concentrated between exploration lines19 and 04, indicating the potential presence of a concealed Sn-Cu-rich mineralization center at depth. These re.sults provide a practical methodological framework for deep exploration of skarn-type Zn-Sn deposits in southeast.ern Yunnan and comparable metallogenic belts. |
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