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Article by Wang, L. L. 1 |
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Article by 2 |
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Article by Xu, J. H. 2 |
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Article by Sun, F. Y. 1 |
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Article by Lin, L. H. 2 |
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Article by Chu, H. X. 2 |
�½�����̩��Ե��������—��ľ����һ���Ŀ�������������ͳ����������ı�����ϵ�С����������ĺ����ɽ�γ���Zn--Pb ( Cu) ����������--��ʯ̿������ײ��ɽ��Ӧ�γ���Cu--Au ʯӢ����; ǰ������ľ����VMS ��Zn--Pb ( Cu) ��Ϊ������������ɽ�������������Ϊ��������ɽ�йص���״����������ľ���ص�VMS ���С�ͨ���Ա�������ȶ�ͬλ����������Ͽı��α��ʺ�����������������о��˳ɿ����ʡ��ɿ�������Դ�Ϳ�����������������ɿ������ʯӢ������ľ����Zn--Pb ( Cu) �������ڷ����ĺ���ͭ��ʯӢ���о�����̼�� ( CO2--CH4--N2 ) ��������壬��������ײ��ɽ����Һ���������йء���ľ����Zn--Pb ( Cu) ���д���VMS �ڵĽ�Ⱦ״��ʯ������δ34S Ϊ��26. 46 × 10-3 �� ��19. 72 × 10 -3������Ҫ��Դ�ں�ˮ�����ε�����ԭ��ϸ����ԭ����; ��������ڵ��Ӹ������״������ֵ�����������������ʯӢ����δ34S ֵ�ӽ�������Ҫ��Դ����ɽ�����е���Դ���塣���������������ʯӢ������ľ����Zn-- Pb ( Cu) �����ں���ͭ��ʯӢ����δDH2O ֵ��δ18OH2O ֵ������ӳ����ײ��ɽ����Һ���ҽ���ͱ��������йء����������������ʯӢ����̼�����������CO2 ��ϵ��δ13 C Ϊ�� 21. 15 × 10-3 �� ��7. 51 × 10 -3��CH4 ��ϵ��δ13C Ϊ��34. 11 × 10 -3 �� ��28. 38 × 10-3 ; ��ľ����Zn--Pb ( Cu) ����ͭ��ʯӢ����̼�ʰ������õ�δ13C Ϊ��8. 02 × 10 -3 �� ��6. 99 × 10 -3��δ13 C �����뺣���ɽ�����أ����ҽ�Դ���Դ���ص㡣
The Sarekoubu--Tiemurte deposits in southern Altay of Xinjiang occurred in metamorphic rocks of Lower Devonian Kangbutiebao Formation�� The Zn--Pb ( Cu) mineralization related to the Early Devonian marine volcanic deposition Zn--Pb ( Cu) and the late Devonian--Early carbonifeneus quartz veins mineralization related to the collisional orogeny�� The former is represented by the VMS type Tiemurte Zn--Pb ( Cu) deposit��and the latter by the orogenic type Sarekoubu gold deposit��and the vein mineralization related to orogeny superposed in the VMS deposit�� Based on the study and comparison of stable isotope characteristics of the two types of mineralization��combined with the deformation and metamorphism of mineralization and fluid inclusions��the authors discuss the metallogenic minerals��fluids and ore genesis�� The carbonic ( CO2-CH4--N2 ) fluids inclusions are widely developed in the sulfide quartz veins of the Sarekoubu deposit and the Cu-bearing quartz veins in late stage of Tiemurte deposit��indicating that the carbonic fluid inclusions are related to the hydrothermal fluid of collision orogeny�� In the Tiemurte Zn--Pb ( Cu) deposit��the δ34S values of sulfides in VMS ores range from ��26. 46 × 10-3 to �� 19. 72 × 10-3��indicating that the sulfur mainly from the inorganic reduction and bacterial reduction of seawater sulfate�� The δ34S of sulfides from late superimposed veins is closed to the δ34S values of sulfides in Sarekoubu gold deposit��indicating a deep source of sulfur in the ores�� The δDH2O and δ18OH2O in the Sarekoubu gold deposit and Tiemurte Zn--Pb ( Cu) deposit indicate the fluids in collision orogeny were related with the magmatic activity and metamorphism�� δ13C values of CO2 in carbonic inclusions range from �� 21. 15 × 10-3 to ��7. 51 × 10-3��and those of CH4 range from ��34. 11 × 10-3 to ��28. 38 × 10 -3 in Sarekoubu gold deposit�� Whereas��δ13C values from inclusions in late Cu-bearing quartz veins in the Tiemurte range from ��8. 02 × 10 -3 to �� 6. 99 × 10-3��δ13C show a deep source or magma source that is not related with marine volcanic sedimentary��