The East Tianshan Jueluotage Erea Carboniferous Geochemistry And Its Tectonic Implications

This thisis do more sestimatic study about the jueluotage region volcanic rockgeochemistry and its tectonic implications Department,from the Geological Surveyresearch in the field and analysis of sample data we can obtained the draw of the mainrock types, sequence, petrology, geochemical characteristics and source region andother aspects of the new data.throuh the study can obtained the progress andconclusions:1、Jueluotage regon is devided into three Formation district by the three mainfault(Kangguerfault,Aqikuduke fault and yamansu fault) liwenming et all(2002),north part is harlike-dananhu fotmation zone, The without Tectonostratigraphicthat consisting of Kangguer Huangshan ductile shear zone from the sentral part andAqishan-Yamansu formation disrict from the south part Outcrops of volcanic rocksare mainly distributed Qieshan Group, groups of Wutongwozi, Gandun group andgroup Yamansu.this thesis mainly used to Qieshan grop,Wutongwozi grop andYamansu grop volcanic rocks for the analysing this erea’s volcanic.2、Rock geochemistry and tectonic features of three strata were：Qieshanqunvolcanic’s rock Rock assemblages is basaltic andesite and rhyolite, belong to thecalc-alkaline basalt. REE rightist enrichment of LREE enrichment type,its Based involcanism very similar with the REE distribution pattern of the typical flood basalts inthe world. Acidic volcanic rocks also show LREE enrichment mode,Eu showsnonobvios difict. Spider diagram shows the typical feature of subduction zonevolcanic rocks.3、The basalt rock assemblage of the wutongwozi group for tephrite and picriticbasalt. Belong to the calc-alkaline basalts. The Al2O3Change within the range of14.64-18.21. Belong to the high-alumina basalt.related to Qieshanqun basalt. Volcanicrocks of total rare earths is insignificant, the rightist enrichment, there is no obviousEu anomalies or weak positive anomaly（δEu=1.01~1.04）. Wutongwozi volcanicrocks also enrichment of LILE,with noobvios difict in High field strength elements Nb,Ta, Ti.4、The basalt rock assemblage of the Yamansu grop forDacite and rhyolite.Belong to the low potassium tholeiitic. The Al2O3Change within the range of（13.77-19.34%）, Belong to the high-alumina basalt,relaed with the Qieshanqunvolcnic.feature of a flat HREE, LILE elements Rb, TH, U, La and Ce enrichment, lossTa, Y, Ti, and Zr and High field strength elements. Tectonic discrimination diagram ofYamansu volcanic rocks are exposed in the island arc environment.