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| PubMed | |
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Article by Hou, X. G. 1 |
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Article by Yie, S. Q. 1 |
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Article by Yang, Y. C. 1 |
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Article by Li, X. W. 1 |
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Article by 2 |
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Article by Jin, H. B. 2 |
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Article by Li, M. F. 1 |
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Article by Hao, Y. J. 1 |
��ʮ��վ���λ�ں�����ʡĮ�����������������¡�𱱶����Ϻ�����������ر�Ե�����帳���ڶ�ʮ��վ������ɰ��--�������У��ҽ������������ҡ�������Ϊ������ɿ��ϵ���С������ڹ�����9 ����ʴ�����10 ������壬���峤600 �� 1 290 m����1. 86 �� 5. 70 m����Ʒλ( 1. 31 �� 2. 44) × 10 �� 6�����컷���б�ͼ����������ڻ�����Ϊ��ɽ����ң����븩����йص�½Ե���������컷���������������Ҿ��е����ͻ��½��Ե���ҽ��ҵ�����; ��ʮ��վ��ɰ�Ҿ��д�½�����Ĺ��컷�������������������ݻ���������Ϊ����٪����ĩ—��٪�������ڣ���̫ƽ����б�����������ǰ���²�����ʮ��վ��ɰ���еĽ�Ԫ�س��θ�������Ϊ�ɿ��ṩ�����ռ䡣��٪����������--�����ҽ����룬������������ã����µ�������ﱻ�����ֽ�����ر�dz��������ڳɿ�������λ�ɿ�
Sanshier'zhan gold deposit is located in the northeastern Erguna rising part on the edge of upper Heilongjiang Basin of fault subsidence�� The gold ores are yielded in medium-grained sandstone in Ershi'erzhan Formation�� Magmatic rocks are mainly with diorite and granite which is closely related to mineralization�� Nine alteration zones and ten gold ore bodies were discovered within the mining area�� The ore bodies ranges 600 �� 1 290 m long by 1. 86 �� 5. 70 m wide�� The gold grade is ( 1. 31 �� 2. 44) × 10 ��6 �� According to tectonic environment discrimination diagrams��granite in this mining area is orogenic granite��showing some geochemical characteristics of that from island arc or continental margin environment related to the subduction zone�� Diorite shows the characteristics of that from island arc or active continental margin environment�� Sandstone in Ershierzhan Formation shows the characteristics of that from continental island arc�� At the end of Middle Jurassic--early Late Jurassic��the Pacific Plate had obliquely subducted the lower part of the Siberian Plate��which leads the gold element started enrichment in Ershierzhan Formation for the first time��and provided a favorable space for mineralization�� In late Late Jurassic�� magmatic fluid interacted with the mantle and caused the mantle metal sulfide oxidation decomposition and brought to the superficial ground�� It finally enriched and mineralized in favorable metallogenic parts��