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2013, 32(1) 24-34 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Chronology��geochemical characteristics and genesis of Qiupigou copper deposit in Heilongjiang |
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WANG Lin, YANG Yan-Chen, ZHANG Guo-Bin, LI Hai-Yang |
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College of Earth Sciences��Jilin University��Changchun 130061��China |
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Abstract��
Qiupigou deposit is located in the Lesser Xing'an range--Zhangguangcai range metallogenic belt�� The systemic field geological survey��zircon LA--ICP--MS U--Pb dating��test of major and trace element results show that the major elements ( Ca��Ti��Al��Si��etc) are transferring among marble��skarn and limestone rocks�� and the content of the elements among these rocks exhibits a linear change�� The mineralization granites belong to ultraluminum and calc-alkaline rocks ( A/CNK = 1. 26��Na2O/K2O = 0. 93��σ = 1. 27) �� The granites is enriched in Rb��Th��U��Nd��Yb��and depletion in Sr��P��Ti��which is compatible with the geo-chemical characteristics of subduction magma�� The distributing pattern of rare elements are rich in LREE and deficient in HREE with negative Eu abnormalities�� The same REE distributing patterns show that the granites have some relation in petrogenesis�� The zircon U--Pb ages of 184. 1 ± 2. 2 Ma show the granites formed in Early Jurassic�� The Qiupigou deposit was formed later than 184. 1 ± 2. 2 Ma and probably related to subduction of the Paleo-Pacific�� |
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Keywords��
geochemistry
LA --ICP --MS U --Pb zircon dating
skarn copper deposit
Qiupigou
Heilongjiang Province
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