物探与化探2025，Vol.49Issue(6)：1261-1270,10.DOI:10.11720/wtyht.2025.0067
江南造山带中段巨型花岗岩型锂矿集区水系沉积物异常信息提取
Extraction of geochemical anomalies from stream sediments in the giant granite-hosted lithium ore cluster within the middle segment of the Jiangnan Orogen
摘要
Abstract
In recent years,the Yifeng-Fengxin area of Jiangxi Province has witnessed significant breakthroughs in the exploration of granite-hosted lithium deposits,making it one of China's significant lithium ore clusters.However,there have been few reports on the application and achievements of lithium-related techniques.Focusing on 2,343 stream sediment samples from a 1∶50,000 geochemi-cal survey in the Yifeng-Fengxin area,this study statistically analyzed geochemical parameters of over 20 elements.Subsequently,be-ryllium(Be),lithium(Li),niobium(Nb),rubidium(Rb),and tin(Sn)were determined as elements related to the mineralization and association of lithium deposit.Among these,Li and Sn showed strong enrichment and significant differentiation.Using statistical methods such as cluster and factor analyses,the five elements were further grouped into three assemblages:Rb-Be,Li-Sn,and Nb.Besides,this study processed and analyzed the stream sediment data from the Yifeng-Fengxin area using the iterative method,determi-ning the lower threshold of both geochemical anomalies.Then,single-element and multi-element geochemical anomalies were investiga-ted,with lithium identified as the primary ore-forming element.These anomalies,featuring prominence and large scale,were primarily situated in the northern and northeastern parts of the survey area,with concentration centers located in muscovite granite outcrops.The Li-Sn assemblage,serving as an indicator for granite-hosted lithium deposits,coincides well with the distribution of ore bodies.This confirms that Li-Sn assemblage anomalies in stream sediments can effectively delineate granite-hosted lithium deposits.Based on the a-nomaly characteristics from the 1∶50,000 stream sediment survey,two prospect areas were delineated in the periphery,providing guidance for further lithium exploration.关键词
花岗岩型锂矿床/水系沉积物/地球化学异常/找矿远景区/宜丰—奉新地区Key words
granite-hosted lithium deposit/stream sediment/geochemical anomaly/prospect area/Yifeng-Fengxin area分类
天文与地球科学引用本文复制引用
刘爽,卢亚鑫,周雪桂,吴俊华,冯佳鑫,李艳军..江南造山带中段巨型花岗岩型锂矿集区水系沉积物异常信息提取[J].物探与化探,2025,49(6):1261-1270,10.基金项目
江西省科学技术厅"科技+"联合计划项目(2023KDG01005) （2023KDG01005）
