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黑龙江伊春大安河金矿床区辉长岩的锆石U——Pb 年龄及其地质意义
引用本文:唐臣,柴鹏,孙景贵,王清海,陈行时,李怡欣,杨帆,刘勇胜.黑龙江伊春大安河金矿床区辉长岩的锆石U——Pb 年龄及其地质意义[J].世界地质,2011,30(2):173-179.
作者姓名:唐臣  柴鹏  孙景贵  王清海  陈行时  李怡欣  杨帆  刘勇胜
作者单位:1. 黑龙江省地质调查研究总院,哈尔滨150036; 2. 吉林大学地球科学学院,长春130061; 3. 吉林大学东北亚国际地学研究与教学中心,长春130026; 4. 中国地质大学地质过程与矿产资源国家重点实验室,武汉430074
基金项目:国家自然科学基金(40772052); 中国地质调查局计划工作项目(资[2010]6-06); 黑龙江省地质矿产局地质调查研究院课题(3R1101604422)联合资助
摘    要:黑龙江伊春大安河金矿床与成矿密切相关的辉长岩系统年代学的研究结果及锆石的CL 图像和 Th /U 比值特征表明,辉长岩中锆石U--Pb 测年结果可划分为4 组,其年龄值分别为: 811 ~ 812 Ma、 480 ~ 502 Ma、259 Ma 和210 ~ 175 Ma。其中210 ~ 182 Ma ( 均值203. 4 ± 2. 5 Ma) 代表辉长岩的形成时代,岩浆从源区到就位结晶过程大致经历28 Ma; 其他3 组为捕获的碎屑锆石,揭示该区晚元古代、中寒武世、晚二叠世曾发生过强烈的地壳增生作用; 从岩浆演化与矽卡岩化作用角度分析,成矿作用发生在岩体就位过程或早侏罗世中期( 均值189 ± 3 Ma) 的伸展阶段。

关 键 词:辉长岩  锆石U--Pb  年龄  大安河金矿床  黑龙江省

SHRIMP U-Pb zircon age of gabbro in Da'anhe gold deposit and its geological implications of Yichun, Heilongjiang Province
TANG Chen,CHAI Peng,SUN Jing-gui,WANG Qing-hai,CHEN Xing-shi,LI Yi-xin,YANG Fan,LIU Yong-sheng.SHRIMP U-Pb zircon age of gabbro in Da'anhe gold deposit and its geological implications of Yichun, Heilongjiang Province[J].World Geology,2011,30(2):173-179.
Authors:TANG Chen  CHAI Peng  SUN Jing-gui  WANG Qing-hai  CHEN Xing-shi  LI Yi-xin  YANG Fan  LIU Yong-sheng
Institution:1. Heilongjiang Institute of Geological Survey,Harbin 150036,China; 2. College of Earth Sciences,Jilin University,Changchun 130061,China; 3. International Centre for Geoscience Research and Education in Northeast Asia,Jilin University,Changchun 130026,China; 4. State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China
Abstract:The systematic chronological research of the gabbro associated with the mineralization of Da'anhe gold deposit in Yichun of Heilongjiang,and the CL images of zircon and Th/U ratio characteristics showed that: the zircon U—Pb dating of gabbro can be divided into 4 groups: 811~812 Ma,480~502 Ma,259 Ma and 210~175 Ma,respectively.The 210~182 Ma(mean 203.4±2.5 Ma) represents the forming time of gabbro and the magma experienced 28 Ma from the source to crystallization.The other three groups belong to captured detrital zircons,which revealed this region experienced crustal growth during Late Proterozoic,Middle Cambrian and Late Permian.Mineralization occurred in the process of rock emplacement or the extension period in the middle Early Jurassic(mean 189±3 Ma) from the perspective of magma evolution and of skarnization.
Keywords:grabbro  zircon U—Pb age  Da'anhe gold deposit  Heilongjiang Province
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