| 龙灵利,张志超,王书来,阴元军,王新雨,何西恒,张延东,卢正华,肖国雄,黄波.新疆东天山土屋斑岩型铜矿床矿脉分带规律及找矿标志[J].矿产勘查,2025,16(5):979-989 |
| 新疆东天山土屋斑岩型铜矿床矿脉分带规律及找矿标志 |
| Ore vein zoning patterns and prospecting indicators of the Tuwu porphyry copper deposit, East Tianshan, Xinjiang |
| 投稿时间：2025-04-01 |
| DOI：10.20008/j.kckc.202505004 |
| 中文关键词: 土屋铜矿 斑岩型矿床 矿脉分带 成矿斑岩体 找矿标志 东天山 新疆哈密中图分类号:P618.41文献标志码:A文章编号:1674-7801(2025)05-0979-11 |
| 英文关键词: Tuwu copper deposit porphyry-type deposit ore vein zoning ore-forming porphyry exploration |
| 基金项目:本文受国家科技重大专项“冈底斯中段斑岩铜多金属矿成矿规律与找矿勘查模型”(2024ZD1003201)、紫金集团矿山综合找矿预测专项“重要矿床类型成矿规律与找矿预测研究”(KCDZKCY-2022-048)和哈密鼎新铜业股份有限公司项目“哈密土屋铜矿I、II号矿体成矿规律及成矿预测研究”(20220222)联合资助。 |
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| 中文摘要: |
| 新疆哈密土屋铜矿是东天山造山带内一大型斑岩型矿床。本文基于钻孔岩心观察和岩石地球化学分析，揭示了土屋矿区矿脉分带规律和成矿斑岩体特征，总结了找矿标志。本研究表明，矿脉从浅部到深部具有明显的垂向分带特征，依次为裂隙脉带、细(网)脉带、大脉带、网脉带和“石英核”。成矿斑岩体为斜长花岗斑岩，其为钙碱性岩石，稀土元素呈右倾配分模式，具 Eu弱正异常及 Nb、Ta、Sr、Ti负异常，显示埃达克质岩特征。早石炭世斜长花岗斑岩-闪长玢岩成矿“岩套”、东西向构造、矿脉分带、蚀变分带、Cu元素异常以及高极化率、中低电阻率和弱—中磁等物探异常均可作为土屋矿区及区带内斑岩型矿床的找矿标志。该研究可为东天山地区斑岩型铜矿的勘探提供理论依据和实践指导。 |
| 英文摘要: |
| The Tuwu copper deposit in Hami, Xinjiang is a large porphyry deposit in the East Tianshan Oro.genic Belt, northwest China. Based on drill core observations and petrogeochemical analysis, this study investigatesthe zoning pattern of ore veins, analyzes the characteristics of the ore-forming porphyry, and summarizes prospect.ing indicators of the Tuwu deposit. The results indicate that the deposit exhibits distinct vertical vein zoning fromshallow to deep levels, sequentially comprising a fracture vein zone, stockwork vein zone, large vein zone, densestockwork zone, and "quartz core". The ore-forming porphyry is plagiogranite porphyry, which belongs to the calc-alkaline series. It displays a right-sloping REE pattern with weak positive Eu anomalies and negative Nb, Ta, Sr,and Ti anomalies, indicating adakitic affinity. Prospecting indicators for porphyry-type deposits in the Tuwu ore dis.trict and surrounding areas include: the Early Carboniferous plagiogranite porphyry– diorite porphyrite metallo.genic "suite", E-W-trending structures, ore vein zoning, alteration zoning, Cu geochemical anomalies and geophysi.cal anomalies (high polarization, moderate-low resistivity, and weak-magnetic signatures). The results of this studyprovide both theoretical and practical guidance for porphyry copper exploration in the East Tianshan. |
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