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2012, 31(2) 262-270 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Geological and geochemical characteristics and genesis of ferromolybdenum deposit in Wudaoling��Heilongjiang Province |
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SHI Peng-Hui, YANG Yan-Chen, YE Song-Qing, HAN Shi-Jiong |
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College of Earth Sciences��Jilin University��Changchun 130061��China |
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Abstract��
Wudaoling ferromolybdenum deposit is a typical skarn deposit in Lesser Xing'an range-Zhangguangcai
range metallogenic belt�� Orebodies are hosted in skarn zone between pyritized quartz porphyry��alterated product
of alkali-feldspar granite��with tuffaceous sandstone and acid tuff of Wudaoling Formation�� The mineral assemblage
of skarn was composed of garnet��diopside��actinolite and epidote��etc�� The orebodies are irregular in shape��and
characterized by branch and composite form�� The types of ores included molybdenum��iron and pyrite ores�� The alkali-
feldspar granite and quartz porphyry closely related to mineralization��are metaluminous-peraluminous in nature��
belonging high potassium calc-alkaline I-type granties�� The granties were enriched in LILE ( such as Rb��K��
U) and depleted in HFSE ( such as P��Ti) ��which was compatible with the geochemical characteristics of subduction
granites�� LA--ICP--MS U--Pb zircon dating showed that the formation age of quartz porphyry and alkali feldspar
granites were 193. 6 �� 1. 1 Ma and 193. 9 �� 1. 3 Ma��respectively�� Combining with regional geological evolution
characteristics��the authors suggested of that the formation of Wudaoling ferromolybdenum deposit was related to the
extended environment after subduction of the ancient Pacific Plate�� The metallogenic epoch was Early Jurassic( 186 �� 2 Ma) and genesis belonged to skarn type�� |
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Keywords��
geological characteristics
geochemistry
metallogenic epoch
genesis
Wudaoling ferromolybdenum deposit
Heilongjiang Province
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Received Revised Online: |
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