Characteristics And Metallogenic Prospect Evaluation Of Seal Beach Basic-ultrabasic Complex Rock Mass In East Tianshan Area,Xinjiang Province

Jueluotage tectonic belt is an important mineralization tectonic belt in the East Tianshan region,Xinjiang Province.In the East Tianshan Mountain of Xinjiang Jueluotage tectonic belt eastern region,predecessors have discovered Xiangshan,Huangshan,Huangshan East,Mirror Springs,Tulaergen and so on Cu-Ni sulfide deposits successively.At the same time,Cu-Ni sulfide ore points and mineralization points were discovered in the outer or adjacent areas.The ore-hosting rock of those ore points and mineralization points both are basic-ultrabasic complex rock mass.However,there is little research in the midwest region of Jueluotage tectonic belt.Until 2012,Jueluotage tectonic belt middle and western area gradually discovered Baixin Beach and Lubei Cu-Ni sulfide deposits that related to the basic-ultrabasic complex,as a new breakthrough in the area to find mine.Taking Baixin Beach Cu-Ni sulfide deposits as a typical ore deposits,from the tectonic setting,mineralization belt,the ore-controlling condition,rock-forming age,the physicochemical field characteristics and so on to compare,make a metallogenic prospect evaluation for Seal Beach East and Seal Beach rock mass.This article as a important supplement of the Cu-Ni sulfide deposits insufficient research work in Jueluotage tectonic belt middle and western area,for subsequent prospecting exploration,the delineation of the prospective target to provide certain theoretical basis.Three tectonic position of rock mass are the early Paleozoic south lake island arc belt,controlled by big grass land faultage.Volcanic rocks in the study area are given priority to with carboniferous volcanic rocks,eruption time from the devonian to the carboniferous.main elements Studies have shown that target complex belong to calc alkalic-tholeiitic series;Mg~#is close to other Cu-Ni sulfide deposits in east Tianshan Mountain.In accordance with oxide correlation indicates that a separation crystallization of olivine and monoclinic pyroxene.m/f value show seal beach east may have greater mineralization possibility.Trace elements show relative enrichment large ion lithophile elements,the Nb and Ta are depleted.The difference is that there are obvious positive Ti anomalies in the Peridotite of Seal Beach and Seal Beach East rock mass,and the Sr is slightly deficient in Seal Beach rock mass.Most of the rare earth elements are rightwards type,and the Eu in the Seal Beach and Seal Beach East rock mass is also a positive anomaly.Zircon U-Pb isotope dating results is relatively close,respectively(276.6+4.4)Ma,(279+2)Ma,(278+2)Ma,both belong to the early Permian,other typical Cu-Ni ore deposits and magnesium iron-super mafic rock in the region diagenesis at the same time.The inclusion of geophysical and chemical fields is good;the characteristics of the rock mass of the Seal Beach East and the Baixin Beach rock mass are more consistent.Studies that Seal Beach East complex rock mass has a good metallogenic prospective.