摘要
崇义—大余—上犹矿集区是世界著名的黑钨矿床集中区,本文选择钨锡-多金属硫化物石英脉型(柯树岭和漂塘矿床)和锡钨石英脉型(仙鹅塘矿床)3个矿床石英中的白云母开展40Ar/39Ar年代学研究,测得坪年龄分别是:钨锡-多金属硫化物石英脉型是158.9±1.4 Ma(漂塘)、158.8±1.2 Ma(柯树岭);钨锡石英脉型的是231.4±2.4 Ma(仙鹅塘),在反等时线图上,其对应的截距年龄分别是158.8±1.6 Ma、158.7±1.9Ma和232.5±2.4 Ma。由此表明,在崇余犹矿集区内存在两个不同成矿时期,即以黑钨矿为主的多金属硫化物石英脉型矿床形成于中侏罗世,集中于160~150Ma之间,与南岭地区钨锡矿床的主成矿期是一致的;而以锡石为主的,并含有大量白钨矿的石英脉型矿床可形成于印支期。
Chong-Yu-You mineral deposit intensive area is renowned for its wolframite. This paper focuses on the study of ^40Ar/^39Ar chronology of muscovite from three deposits： Keshuling and Piaotang tungsten-tinmultiple metals deposits （sulphide quartz vein type）, and Xian＇etang tungsten-tin deposit （quartz vein type） in the Chongyi-Dayu-Shangyou concentrated mineral area. The ^40Ar/^39Ar plateau age is 158.8±1.9 Ma, that of Keshuling is 158.8±1.2 Ma for Piaotang, and 231.4±2.4 Ma for Xianetang, and the ^40Ar/^39 Ar reverse isochron ages are 158.9±1.4 Ma, 158.7±1.9 Ma, and 232.5±2.4 Ma respectively. These results indicate that there occurred two metallogenic epochs in the Chong-Yu-You intensive mineral area. Namely, the tungsten-multiple sulfide quartz vein type deposits formed in the Middle Jurassic Epoch mainly between 160 and 150 Ma, similar to the major metallogenic epoch of tungsten-tin deposits in the Nanling region; the cassiterite-scheelite quartz vein type deposits formed in the Indo-Chinese Epoch. The authors also discussed the granite diagenesis and mineralization in the Indo-Chinese Epoch and the inherited features of the Mesozoic mineralization in the Nanling area.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2008年第7期932-940,共9页
Acta Geologica Sinica
基金
国家科技支撑计划“南岭地区有色-贵重金属成矿潜力及综合探测技术示范研究”课题
中国地质调查局“中国成矿体系综合研究”项目
“我国重要矿产和区域成矿规律研究”项目资助的成果
