中文摘要:通过对中甲锡多金属矿床石英斑岩中锆石的SHRIMP U-Pb测年,获得了(98.5±1.7)Ma(n=29,MSWD=1.8)的年龄值,说明中甲矿区石英斑岩是早白垩世晚期(燕山晚期)区域构造-岩浆活动的产物.通过区域对比后认为,中甲矿区的锡多金属成矿是华南钨、锡多金属成矿省边部燕山晚期成矿作用的组成部分.研究提出,闽西南地区的燕山晚期花岗岩及其外接触带是今后寻找燕山晚期形成的锡多金属矿的找矿方向.
Abstract:Mineralizations of the Zhongjia tin_polymetallic deposit in Longyan area of Fujian Province are composed of vein_type ore bodies in the external contact zone and veinlet_disseminated Sn_Wo_mineralization in the inner contact zone, belonging to post_magmatic hydrothermal type related to quartz porphyry of the area. SHRIMP U_Pb dating of twenty zircon grains from the quartz porphyry gived the weighted mean age of （98.5±1.7）Ma（n=29，MSWD=1.8）, suggesting that the quartz porphyry in the deposit was produced by regional tectono_magmaticactivities during the late stage of Early Cretaceous. Tin_polymetallic mineralization of the Zhongjia deposit occurred in Late Cretaceous instead of in Early Jurassic and constituted a part of Late Yanshanian meta_llogenic activity on the margin of the South China tungsten, tin and polymetallic province, as evidenced by regional metallogenic correlation. The authors hold that the prospecting targets of tin_polymetallic deposits in southwestern Fujian Province should be Late Yanshanian granitic
bodies and their external contact zones.
keywords:geochemistry SHRIMP U_Pb dating tin_polymetallic deposit Zhongjia deposit in Fujian Province
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基金项目:国家自然科学基金面上项目（40772063）
引用文本：
杨祖龙,张德全,丰成友,佘宏全,李进文.2008.福建龙岩中甲锡多金属矿床石英斑岩中锆石的SHRIMP U-Pb年龄及其地质意义[J].矿床地质,27(3):0YANG ZuLong,ZHANG DeQuan,FENG ChengYou,SHE HongQuan, LI JinWen .2008.SHRIMP zircon U-Pb dating of quartz porphyry from Zhongjia tin-polymetallic deposit in Longyan area, Fujian Province, and its geological significance[J].Mineral Deposits27(3):0
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