[an error occurred while processing this directive] Global Geology 2017, 20(4) 200-207 DOI:   10.3969/j.issn.1673-9736.2017.04.02  ISSN: 1673-9736 CN: 22-1371/P
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central Jilin
Jifanggou metamorphic complex
zircon LA-ICP-MS U-Pb age
tectonic melange
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PubMed
Dating for Jifanggou metamorphic complex in central Jilin and its tectonic implications
WANG Zhongcheng1, LU Xiaoping3, ZHAO Juan2, TAO Junyu3, CHEN Mingjian1
1. The First Geological Survey of Jilin Province, Changchun 130033, China;
2. Regional Geology and Mineral Resources Survey of Jilin Province, Changchun 130022, China;
3. Nuclear Industry Geological Bureau of Jilin Province, Changchun 130062, China
ժҪ�� Based on the results of four regional geological surveys of 1:50000 including Shulan County map in Jilin, taking Shulan area as the study area,the authors re-delineated the rock type assemblages, e.g. metamorphic rhyolite, metamorphic tuffaceous breccia lava, sericite-quartz schist and tremolite altered rock, etc., and the structural contacts between them. With the help of in-situ LA-ICP-MS U-Pb dating for zircons, it is concluded that the zircon crystallization ages of the metamorphic rhyolite, the metamorphic andesitic tuff breccia lava and the tremolite altered rock are 339.1±1.3 Ma(n=27,MSWD=0.78),351.8±1.7 Ma(n=21,MSWD=0.82),and 362.0±1.8 Ma(n=43, MSWD=2.2) respectively. The metamorphic complex is actually a set of tectonic melange which comprises the rocks in different types, sources, times, or tectonic settings, and was formed by tectonism.
�ؼ����� central Jilin   Jifanggou metamorphic complex   zircon LA-ICP-MS U-Pb age   tectonic melange  
Dating for Jifanggou metamorphic complex in central Jilin and its tectonic implications
WANG Zhongcheng1, LU Xiaoping3, ZHAO Juan2, TAO Junyu3, CHEN Mingjian1
1. The First Geological Survey of Jilin Province, Changchun 130033, China;
2. Regional Geology and Mineral Resources Survey of Jilin Province, Changchun 130022, China;
3. Nuclear Industry Geological Bureau of Jilin Province, Changchun 130062, China
Abstract: Based on the results of four regional geological surveys of 1:50000 including Shulan County map in Jilin, taking Shulan area as the study area,the authors re-delineated the rock type assemblages, e.g. metamorphic rhyolite, metamorphic tuffaceous breccia lava, sericite-quartz schist and tremolite altered rock, etc., and the structural contacts between them. With the help of in-situ LA-ICP-MS U-Pb dating for zircons, it is concluded that the zircon crystallization ages of the metamorphic rhyolite, the metamorphic andesitic tuff breccia lava and the tremolite altered rock are 339.1±1.3 Ma(n=27,MSWD=0.78),351.8±1.7 Ma(n=21,MSWD=0.82),and 362.0±1.8 Ma(n=43, MSWD=2.2) respectively. The metamorphic complex is actually a set of tectonic melange which comprises the rocks in different types, sources, times, or tectonic settings, and was formed by tectonism.
Keywords: central Jilin   Jifanggou metamorphic complex   zircon LA-ICP-MS U-Pb age   tectonic melange  
�ո����� 2017-10-05 �޻����� 2017-11-08 ����淢������  
DOI: 10.3969/j.issn.1673-9736.2017.04.02
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