沉积与特提斯地质2025，Vol.45Issue(4)：724-736,13.DOI:10.19826/j.cnki.1009-3850.2025.11002
喜马拉雅带东段穹窿深部物质结构:锡成矿的启示
Deep structure of domes in the eastern Himalayan belt:Insights into tin mineralization
摘要
Abstract
Tin,a critical strategic mineral,plays a vital role in socioeconomic development.Recent exploration breakthroughs in the Cuonadong tin deposit have significantly advanced the assessment of resource potential in the Himalayan belt.Genetic connections exist between exposed domal structures,leucogranites,and Sn-polymetallic mineralization,yet deep structural controls on tin enrichment remain poorly constrained.This study integrates magnetotelluric data to establish a 3-D resistivity architecture extending to a depth of 45 km,synergized with 3-D density models and geochemical evidence.The results reveal two types of high-conductivity anomalies in the eastern Himalayan belt:a dome-adjacent northern anomaly linked to N-S extensional systems,and a southern anomaly along the Cona Rift(extended to a depth of 30 km)associated with E-W extension.E-W extension facilitates mid-crustal partial melting,where heterogeneous mantle-derived heat sources induce variations in melt temperature and differences in melting degree,consequently influencing tin enrichment.This study unravels the deep architecture of the tin-polymetallic metallogenic system in the eastern Himalayas,establishing critical constraints for regional metallogenic models.关键词
喜马拉雅带/穹窿/锡成矿/高导异常/东西向伸展Key words
Himalayan belt/dome/tin mineralization/high-conductivity anomaly/east-west extension分类
天文与地球科学引用本文复制引用
焦彦杰,张林奎,李光明,张志,梁生贤,付建刚,李德伟,黄勇..喜马拉雅带东段穹窿深部物质结构:锡成矿的启示[J].沉积与特提斯地质,2025,45(4):724-736,13.基金项目
深地国家科技重大专项(2025ZD1006300) （2025ZD1006300）
国家重点研发计划项目(2023YFC2906805,2021YFC2901903) （2023YFC2906805,2021YFC2901903）
国家自然科学基金项目(4224100033) （4224100033）
中国地质调查局地质调查项目(DD20240069) （DD20240069）
