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2014, 33(4) 768-779 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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LA-ICP-MS zircon U-Pb dating of sanuklite-(quartz) monzodiorite in Fuxili area，Daxing'anling and its geological siganificance |
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BIAN Hong-Ye, JI Feng, BIAO Shang-Hu |
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1. The First Gold Geologic Party of CAPF，Harbin 150086，China; 2. The Third Oil Production Factory of Daqing Oilfield，Daqing 163000，Heilongjiang，China; 3. No. 3 Gold Geological Party of CAPF，Harbin 150086，China |
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Abstract：
A set of intrusions composed of gabbro- monzodiorite- granodiorite- adamellite occurred in Fuxili area of Daxing'anling accompanied with Xinhuadukou Group of New Proterozoic． The petrographic and geochemical char- acteristics of monzodiorite are very similar to that of the typical sanukite． The LA- -ICP- -MS zircon U- -Pb age is 815. 4 ± 6. 2 Ma，showing the monzodiorite emplaced at the New Proterozoic． The Eerguna block in North Daxing'anling is composed of Xinhuadukou Group of New Proterozoic and accompanying intrusions of the same peri- od，and the geochemical similarity between monzodiorite and sanukite revealed that Eerguna block has entered into modern plate tectonics since the New Proterozoic Era． |
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Keywords：
sanukite
LA-ICP-MS zircon U-Pb dating
Fuxili area
Daxinganling
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