西天山特克斯达坂尔戈带金矿构造特征及其控矿作用-地球科学与环境.PDF

304 Vol.30No .4 2 00812 　Journal of Earth Sciences and Environment 　 Dec.2 0 0 8 聂江涛,魏刚锋,李永军李赛赛 ( , 710054) :, , 。3 :, -, , 、S-C 、A 、A 、、、, (c+g), 36°, σ≈317°∠84°;, -, 1 , , , ; , 。-、() , -, , 、, 。, , - ()。 :;;; :P54　:A 　:1672-6561(2008)04-0357-010 Structural Characteristics and ItsOre-controlling Effect in Ergedai GoldDeposit in Tekesi Daban, XinjiangProvince NIE Jiang-tao, WEI Gang-feng, LI Yong-jun, LI Sai-sai (S choo l of Ear th S ciences and R esour ces , Chan g an Uni versi ty , X i an 710054, S haan x i, Chi na) Abstract:Geological investigation, indoor microstructure and fabric analyses were performed on the Ergedai gold deposit located at the eastern Yishijilike Mountain.The results indicate that, the host stratum of the deposit was island arc volcaniclastic rock which belonged to the upper member of lower Carboniferous Dahalajunshan Formation.Three stages of tectonic movements had happened during the Hercynian period.In the late stage of early Carboniferous, the right-lateral E-W trending ductile-brittle shear zones were formed near the core of the Yishijilike anticline, which extended in the form of gentle wave along strike and dip and presented schitosity zones, S-C foliation, A-type fold, A-type lineation, subgrains in quartz, wavy extinction, relic phenocrysts and structural lens.LPOs of quartz are all composed of small girdle patterns and strong maxima(c+g)with opening angle of 36°, σ≈317°∠84°.During the late Carboniferous period, the ductile-brittle shear zones experienced a 1 left-lateral shearing and with the increasing of brittle deg