| 西藏多龙矿集区拿厅斑岩矿床深部发现世界级富金铜矿体 |
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| 关键词:gold-rich porphyry Cu deposit epithermal Nating Duolong district Bangong–Nujiang ore belt |
| 基金项目:本文由深地国家科技重大专项课题(编号: 2025ZD1006204; 2025ZD1006201)、国家自然科学基金重点项目(编号: 42230813; 4260021344)和西藏多龙矿业有限公司科研项目(编号: HDDL2025-004)联合资助。 |
| 作者 | 单位 | E-mail | | 杨清山 | 西藏多龙矿业有限公司 | 287297553@qq.com | | 杨超 | 成都理工大学, 地球与行星科学学院 | yangchao_21@126.com | | 夏宏伟 | 西藏地质二队地矿有限公司 | xhw9210@gmail.com | | 乔胜俊 | 西藏多龙矿业有限公司 | 10837409@qq.com | | 王勤 | 成都理工大学, 地球与行星科学学院 | | | 陈红旗 | 西藏多龙矿业有限公司 | | | 董玉杰 | 西藏地质二队地矿有限公司 | | | 张旺 | 成都理工大学, 地球与行星科学学院 | | | 孙豪 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室 | | | 唐建科 | 西藏地质二队地矿有限公司 | | | 甘常云 | 西藏地质二队地矿有限公司 | | | 杨欢欢 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室 | | | 周新 | 西藏多龙矿业有限公司 | | | 张琪 | 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室 | | | 李玉彬 | 西藏大学, 工学院 | | | 王婷婷 | 成都理工大学, 地球与行星科学学院 | | | 陈晨 | 成都理工大学, 地球与行星科学学院 | | | 陆倩茹 | 成都理工大学, 地球与行星科学学院 | | | 方向 | 中国地质科学院, 深地探测与矿产勘查全国重点实验室 | | | 唐菊兴 | 中国地质科学院, 深地探测与矿产勘查全国重点实验室 | tangjuxing@126.com |
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| Discovery of a World-class High-grade Gold and Copper Orebody at Depth in the Nating Porphyry Deposit, Duolong District, Xizang |
| Continuous metallogenic research and exploration investment in the Duolong District, Xizang have yielded suc-cessive prospecting breakthroughs in recent years. In particular, a world-class gold-rich porphyry copper deposit has been discovered in the Nating deposit of the Duobuzaxi copper-gold mineralization area, with an associated gold resources of over tens of times more than a large-scale gold deposit (over 20 tons) at a grade of more than four times over cut-off grade of associated Au. This deposit boasts one of the largest resource of associated gold in the porphyry system in China. Its gold enrichment mechanism and gold occurrence state represent urgent scientific issues to be addressed, and the research thereof carries great practical significance for prospecting similar deposits across the region. Its formation is linked to granodiorite porphyries emplaced at 120–118 Ma within the Duolong district. Copper and gold mineralization occurs in close paragenesis, with high-grade gold mostly hosted as native gold and electrum inclusions within chalcopyrite at depth of the deposit. High-grade Au-Cu orebodies predominantly occur at the transitional zone where sericitic alteration overprints potassic alteration, hosting abundant typical ac-cessory mineral assemblages of gold-rich porphyry copper deposits including magnetite, hematite and anhydrite. Abundant high-sulfidation sulfides related to epithermal mineralization, such as digenite, covellite, enargite and tennantite, are developed in the shallow portion of the orebodies and replace early-stage porphyry mineralization of chalcopyrite and bornite. This indicates that, similar to the Tiegelongnan deposit within the district, this deposit represents a porphyry-epithermal superimposed Cu-Au deposit. The zonation of hydrothermal alteration indi-cates that the hydrothermal center is located in the western part of the deposit, with a boundary that remains unde-fined, leaving substantial resource expansion potential for additional gold-rich porphyry copper orebodies in the western district. Furthermore, no high-grade epithermal gold mineralization has been identified thus far in the de-posit, implying a promising prospecting potential for high-sulfidation epithermal gold deposits in the northwestern sector. |
| YANG Qingshan,YANG Chao,XIA Hongwei,QIAO Shengjun,WANG Qin,CHEN Hongqi,DONG Yujie,ZHANG Wang,SUN Hao,TANG Jianke,GAN Changyun,YANG Huanhuan,ZHOU Xin,ZHANG Qi,LI Yubin,WANG Tingting,CHEN Chen,LU Qianru,FANG Xiang,TANG Juxing.2026.Discovery of a World-class High-grade Gold and Copper Orebody at Depth in the Nating Porphyry Deposit, Duolong District, Xizang[J].Acta Geoscientica Sinica,47(5):951-959. |
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