Wang Y.,Beijing Institute of Geology for Mineral Resources |
Wang J.,Beijing Institute of Geology for Mineral Resources |
Long L.,Beijing Institute of Geology for Mineral Resources |
Ding R.,China Non ferrous Metal Resources Geological Surrey |
And 2 more authors.
Acta Petrologica Sinica | Year: 2015
Many large-scale to medium-sized endogenetic metallic deposits proved up in north margin of Junggar Basin (NMJB) of Xinjiang, which are mainly formed in two periods of tectonic-magmatic activity with ocean-continent subduction period and post- collisional orogeny period, are the Devonian island arc porphyry type Cu-Au deposit of earlier period and the Permian Cu-Ni sulfide deposit and orogenic type Au deposit ( or shear zone type Au deposit) of later period. Now, a number of Early Carboniferous diagenetic and metaUogenetic geochronology data of this area are obtained during this work: The ~ 324Ma for diorite in "201" Au deposit, ~ 328Ma for granodiorite-porphyry in Kekesentao area, ~ 323Ma for granite in Tuerkubantao area, and ~ 327Ma for granodiorite in Aketasi Au deposit. These data concentrate in 323 ~ 328 Ma of the Early Carboniferous. It is inferred that the study area may be in coUisional orogenic stage during the Early Carboniferous Epoch through comprehensive analysis. The events of tectonic activity and crust-mantle interaction occurred frequently in this stage, which was quite favorable for ore-forming with porphyry type Mo-Cu, epithermal type Au , and dyke structure altered rock type Au mineralization. Thus , it is considered that there was an Early Carboniferous Au-Cu-Mo metaUogenetic belt associated with hypabyssal rock spreading along northern margin of Junggar Basin.