西北地质2025，Vol.58Issue(4)：131-145,15.DOI:10.12401/j.nwg.2025029
东天山黄山西铜镍硫化物矿床三维模型及其成矿启示
Three-Dimensional Model of the Huangshanxi Ni-Cu Sulfide Deposit and Its Implications for Mineralization,EasternTianshan,NW China
摘要
Abstract
A series of magmatic Ni-Cu sulfide deposits have been successively discovered in the Huangshan-Jingerquan mineralization belt in the eastern Tianshan,with nickel reserves exceeding 1 million tons,making it one of the most developed regions for magmatic Ni-Cu sulfide deposits in the orogenic belt.The Huangshanxi deposit is a large magmatic Ni-Cu sulfide deposit in this region,formed during the transition from collisional orogeny to a post-collision extensional environment.Regional ductile shear zones and fault structures controlled the emplacement of the Ni-Cu sulfide-bearing mafic-ultramafic intrusions.The faults acted as conduits for mag-ma emplacement and provided spaces for sulfide segregation and accumulation.Based on geological data,in-cluding drill cores,exploration section maps,and mid-section geological maps,this study constructed a 3D geo-logical model of the Huangshanxi deposit using Surpac software.By analyzing the three-dimensional space of the orebodies,mafic-ultramafic intrusive rocks,and structures,as well as the spatial distribution of Ni and petro-graphic characteristics of sulfide ores,the role of structure in the formation of Ni-Cu mineralization has been dis-cussed.The main conclusions are as follows:①The morphology of the Huangshanxi intrusion is significantly in-fluenced by faults.The nearly east-northeast-oriented F1 and F10 reverse faults are the most significant faults in the area and control the morphology of mafic-ultramafic rocks.Leading to a unique"tadpole-shaped"intrusion morphology and a basin-like cross-sectional profile.②The orebody 32X was overprinted by post-mineralization structure.It was reactivated by tectonic superposition and enriched along the north-south fault.The ore alteration and deformation were apparent.In contrast,the orebody 30,while partially affected by structural processes lead-ing to localized sulfide enrichment,shows limited deformation and weaker alteration.Mafic-ultramafic rocks primarily control the Ni-Cu mineralization after magmatic emplacement along structures.This study advances the understanding of the magmatic and mineralization processes of the Huangshanxi deposit.It provides new in-sights into the genesis of magmatic Ni-Cu sulfide deposits in the Northern Tianshan.It can serve as a reference for discussing the genesis and exploration of magmatic Ni-Cu sulfide deposits in the orogenic belt.关键词
地质学/岩浆铜镍硫化物矿床/三维地质建模/构造控矿/黄山西Key words
geology/magmatic Ni-Cu sulfide deposits/3D geological modeling/the role of structure in the formation of Ni-Cu sulfide ores/Huangshanxi分类
天文与地球科学引用本文复制引用
刘庭伟,陈国旭,邓宇峰,李卫东,韩建军,谭治雄..东天山黄山西铜镍硫化物矿床三维模型及其成矿启示[J].西北地质,2025,58(4):131-145,15.基金项目
国家自然科学基金项目(42272083、41972304),国家重大研发计划项目(2024YFC2909201),第二次青藏高原综合科学考察研究项目(2019QZKK0708),温州市科技局基础性公益科研项目(S20240037),西安市关键金属成矿与高效利用重点实验室(长安大学)开放基金(300102272503)联合资助. （42272083、41972304）
