(1. 中南大學(xué) 有色金屬成礦預(yù)測教育部重點實驗室，長沙 410083；
2. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長沙 410083)
摘 要: 通過對丁家山鉛鋅礦成礦時代、成礦物質(zhì)來源、成礦流體通道、儲礦場等成礦系統(tǒng)要素的全面分析，明確了丁家山鉛鋅礦區(qū)成礦作用為燕山期花崗質(zhì)巖漿與經(jīng)加里東期區(qū)域變質(zhì)的新元古界馬面山群龍北溪組上段富鈣質(zhì)巖之間的接觸交代變質(zhì)作用。Pb和S等同位素研究及化探掃面結(jié)果顯示：礦區(qū)成礦物質(zhì)由燕山期花崗巖和馬面山群龍北溪組地層共同提供，H和O同位素研究證實：成礦流體由大氣降水和巖漿水共同組成；精細化礦物場填圖指示成礦流體主要通過北東向斷層運移，而礦區(qū)儲礦場由馬面山群龍北溪組上段、上侏羅統(tǒng)長林組和其間的角度不整合接觸界面構(gòu)成。丁家山鉛鋅礦屬擠壓構(gòu)造成礦系統(tǒng)(大類)下屬的與燕山期花崗質(zhì)巖漿有關(guān)的接觸交代成礦系統(tǒng)類。
關(guān)鍵字: 成礦系統(tǒng)；成礦作用；接觸交代變質(zhì)；丁家山鉛鋅礦
Dingjiashan Pb-Zn ore district in Meixian, Fujian Province
（1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education, Central South University,
Changsha 410083, China；
2. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China）
Abstract:Based on the systematic study of metallogenic system elements, such as metallogenic epoch, ore-forming materials source, pass way of ore-forming fluid and site of ore body, it is found that the metallogenesis of Dingjiashan Pb-Zn ore district is contact metasomatic metamorphism between Yanshanian granite and the regional metamorphism calcareous rock of Neoproterozoic Mamianshan Formation Longbeixi group upper. The research on isotope of Pb, S and geochemical exploration confirms that the ore-forming materials are supplied by Yanshanian granite and Mamianshan Formation Longbeixi group, and the research on isotope of H and O confirms that the ore-forming fluid is composed of magmatic water and atmospheric water. The mineral mapping indicates that the ore-forming fluid flows along NE fault. There are three sites of ore body, Neoproterozoic Mamianshan Formation Longbeixi group upper, Jurassic Changlin group and angular unconformity between them. Dingjiashan Pb-Zn ore district is contact metasomatic metamorphism metallogenic system related to Yanshanian granite, which belongs to compression structure metallogenic system.
Key words: metallogenic system; metallogenesis; contact metasomatic metamorphism; Dingjiashan Pb-Zn ore district
