| 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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| 引用本文：杨清山,杨超,夏宏伟,乔胜俊,王勤,陈红旗,董玉杰,张旺,孙豪,唐建科,甘常云,杨欢欢,周新,张琪,李玉彬,王婷婷,陈晨,陆倩茹,方向,唐菊兴.2026.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[J].地球学报,47(5):951-959. |
| DOI：10.3975/cagsb.2026.090312 |
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| 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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| 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。 |
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| 中文摘要:近年来, 得益于成矿理论创新、勘查和研究经费的不断投入, 多龙矿集区取得了持续的找矿突破。尤其是在多不杂西铜金矿区拿厅矿段发现了世界级规模的富金斑岩铜矿, 伴生金超过大型金矿规模(20 t规模)数十倍, 平均品位达到规范所规定的伴生金边界品位四倍以上, 位于我国单个矿床伴生金资源量前列。其金的富集机制和金的赋存状态是亟需解决的科学问题, 对区域上寻找该类矿床具有重要实践意义。该矿床的形成与多龙矿集区内120~118 Ma侵位的花岗闪长岩斑岩有关。铜、金矿化紧密共生, 高品位金矿化多以自然金和银金矿包裹体形式赋存于黄铜矿中。富矿体主要产于绢云母化蚀变叠加于钾硅化蚀变的过渡带, 发育大量磁铁矿、赤铁矿和硬石膏等典型富金斑岩铜矿伴生矿物组合。矿体浅部发育大量浅成低温热液有关的高硫化态硫化物, 如蓝辉铜矿、铜蓝、硫砷铜矿、砷黝铜矿等, 并交代早期黄铜矿和斑铜矿, 表明该矿床与区内铁格隆南等矿床都属于高硫化浅成低温热液成矿作用叠加的斑岩铜金矿床。热液蚀变分带显示热液中心位于矿区西部但还未控制边界, 因此矿床西部还有巨大的富金斑岩铜矿的找矿增储空间。此外, 矿区当前尚未发现独立的类似于菲律宾兰帕多高品位浅成低温热液金矿, 因此认为矿区北西具有高硫化型浅成低温热液金矿的找矿潜力。 |
| 中文关键词:富金斑岩铜矿 浅成低温热液 拿厅 多龙矿集区 班—怒成矿带 |
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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 |
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| Abstract: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. |
| keywords:gold-rich porphyry Cu deposit epithermal Nating Duolong district Bangong–Nujiang ore belt |
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