Genesis Of Carboniferous Volcanic Rocks In The East Tianshan Mountains And The Multi Metal Mineralization Response

Carboniferous volcanic rocks in eastern Tianshan Yamansu tectonic belt is widely distributed, its evolution has been controversial, the discussion and the dispute in a certain extent promote people of magma tectonic- metallogenic process of further research and discussion.Yamansu tectonic zone in the distribution of volcanic rocks are relatively enriched in large ion lithophile elements, and relatively depleted in high field strength elements, similar to the characteristics of island arc volcanic rocks, and incompatible element distribution features table Ming source area by the interference of the dehydration of the subducting slab effect,and Sr Nd isotopic characteristics show that magma formed by crustal material has little effect.Trace element distribution of migration in the magmatic processes with dilute solution of law, and are subject to less interference of hot events of the late, for the study of magmatic origin. Yamansu group volcanic soil of ancient volcanic Tugut Bulak Zr / Nb and Zr / Y ratios are similar to the island arc volcanic rocks, Th / Ta and La / Nb ratio of the display characteristics of island arc volcanic rocks.On discrimination diagram of trace element tectonic environment and Yamansu volcanic rocks and Tugut Bulak volcanic rocks are falling into the scope of volcanic arc and display characteristics of continental margin arc that two groups the study of volcanic rock samples are formed the oceanic plate to continental plate subduction processes.Combined with regional geological data and the results of previous studies,proposed Jamin Carboniferous tectonic belt of the Soviet Union into modes of rock and ore-forming process response. Tectonic conditions is one of the most basic ore controlling conditions, subduction zone to a great extent restricted the regional mineralization.