| 曾礼,田玉珂,林小玉,邓远文,张燕,彭秀红.四川省九龙县观音山铅锌多金属成矿区深部成矿预测:S同位素及黄铁矿热电性证据[J].矿产勘查,2026,17(7):1151-1164 |
| 四川省九龙县观音山铅锌多金属成矿区深部成矿预测:S同位素及黄铁矿热电性证据 |
| Deep mineralization prediction of Guanyinshan lead-zinc polymetallic deposit in Jiulong County, Sichuan Province: S isotope and pyrite thermoelectricity evidence |
| 投稿时间：2025-04-14 |
| DOI：10.20008/j.kckc.202607003 |
| 中文关键词: 观音山铅锌多金属矿 硫同位素 同位素平衡温度 黄铁矿热电性 成矿预测 |
| 英文关键词: Guanyinshan lead-zinc polymetallic mine Sulfur isotope isotope equilibrium temperature pyrite thermoelectricity metallogenic prediction |
| 基金项目:本文受国家自然科学基金面上项目(41372093)、四川省面上基金(2025ZNSFSC0302)和四川省第七地质大队科研项目(CSYKJXM-202204)联合资助。 |
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| 中文摘要: |
| 四川省九龙县观音山地处松潘—甘孜东南缘，浅部地层可见矿化现象，物探发现深部异常明显，本文结合区域地质背景、岩矿特征、S同位素和黄铁矿电热性，探讨了该矿区成矿流体来源，并对深部隐伏矿体进行了预测。结果显示:该矿区黄铁矿存在两个世代；矿区金属硫化物 δ34S值为-2.64‰～+1.55‰，呈塔型分布，硫源与岩浆作用有关，其硫同位素平衡温度范围为 204～521 ℃，与成矿深度大致呈正相关，纵向上可见两期次温度梯度；黄铁矿热电性显示其形成温度为 248～356 ℃，与同位素结果吻合。该矿床多期成矿流体沿东部深大断裂上升，汇聚于大水沟向斜核部成矿，部分成矿流体沿裂隙上升，在近地表形成受构造控制的脉状矿体。P型黄铁矿在 2750 m埋深处可达 98%，指示其深部有较好的找矿前景。 |
| 英文摘要: |
| The Guanyinshan area in Jiulong County, Sichuan Province, is located on the southeastern edge ofSongpan Ganzi. Mineralization can be seen in the shallow strata, and geophysical exploration had found obviousanomalies in the deep strata. This article combines regional geological background, rock and mineral characteris-tics, S isotopes, and pyrite electric heating to explore the source of ore-forming fluids and the prediction of hiddenore bodies in the deep part of the mining area. The results show that there are two generations of pyrite in this min-ing area; the δ34S value of metal sulfides in the mining area is -2.64‰ to +1.55‰, distributed in a tower shape, indi-cating that the sulfur source is related to magmatic activity. The sulfur isotope equilibrium temperature range is 204to 521 ℃, which is roughly positively correlated with the depth of mineralization. Two temperature gradients can beseen vertically; the thermoelectric properties of pyrite indicate a formation temperature of 248-356 ℃, which is con-sistent with isotopic results. The multi-stage ore-forming fluids of the deposit rise along the eastern deep fault andconverge at the core of the Dashuigou syncline for mineralization. Some ore-forming fluids converge along fracturesto form vein like ore bodies controlled by structures near the surface. P-type pyrite can reach up to 98% at a burialdepth of 2750 m, indicating better prospecting prospects in its deeper regions. |
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