伊犁地块构造及成矿区划刍议

伊犁地块可按昭苏-特克斯、婆罗科努南坡-尼勒克、婆罗科努北坡及博尔塔拉-伊林哈比尔尕等断裂,划分为三个构造单元,由南西向北东展布有:伊宁波疏带、婆罗科努波密带和温泉-赛里木波疏带,其构造演化过程是,温泉斯-赛里木、伊犁地块在元古代时期,镶嵌在塔里木地块的西北缘,后来,经历了寒武一中奥陶世早期边缘海盆演化.中奥陶世晚期,温泉-赛里木与伊犁地块裂陷.志留纪末,两地块镶嵌拼贴.晚古生代是断陷-拗陷活动时期.中石炭世是准噶尔地块西南缘伊林哈比尔尕波峰带与温泉-赛里木及婆罗科努构造带镶嵌的主要时期.研究区还划分出三个成矿区带.

A STUDY OF THE TECTONIC AND MINEROGENETIC PROVINCIAL ELEMENTS IN THE YILI BLOCK

The Yili block is divided into three tectonic elements by the Zhaoshu-Tekse fault , that is, the southern slope of the Boluokenu-Nilek fault, the northern slope of Boluokenu fault, and the Bortala-Yilinhabirga fault. From the northeast to the southwest, they are respectively the Yining crest zone, the Boluokenu crest zone and the Wenquan-Sailimu wavy trough tectonic belts. The structural evolution process is that the Wenquan-Sailimu and the Yili blocks were mosaiced together into the northwest margin of the Talimu massif in the various periods of the proterozoic era, and then they underwent a steady developing process and evolved to the margin sea basin in the early stage of the Cambrian-Middle Ordovician. In the late period of the middle Ordovician, they began to rift and the Wenquan-Sailimu block departed from the Yili block. In the late Silurian period because the Boluokenu sea trough was closed by compression,both of the blocks were masaiced together. In the late Palaeozoic era, the fault trough-seg acted repeatedly. The Middle Carboniferous period was a main age that the Yilian-habirga crest zone was put together with the Wenquan-Sailimu and the Boluokenu tectonic belts.The discussed regions are divided into three metallogenic provinces.