东天山板块构造分区、演化与成矿地质背景研究

围绕东天山找矿的基础地质构造问题，编制了新的1：50万东天山地区大地构造图和1：100万东天山地区成矿规律图。划分出新的大地构造单元，确认了中天山结晶轴的存在。将东天山地区显生宇以来的大地构造演化划分为洋壳扩张、俯冲岛弧、弧后盆地和碰撞造山期及造山期后伸展5个阶段，各阶段分别形成了对应的矿床和矿床组合，明确了主要矿床如土屋铜矿（泥盆纪－早石炭世增生弧背景）、黄山－香山铜镍矿（早二叠世同碰撞背景）的成矿时代和成矿环境。

PLATE TECTONICS DIVISION, EVOLUTION AND METALLOGENIC SETTINGS IN EASTERN TIANSHAN MOUNTAINS, NW-CHINA

Eastern Tianshan is one of the most important Cu-Ni-Au metallogenic provinces in China. Focusing on the major tectonic geology and exploration problems, we compiled the latest tectonic map in 1 :500,000 scale and metallogenic map in 1 : 1,000,000 scale of Eastern Tianshan Mountains. The existence of the Middle-Tianshan crystalline axis of Pre-Cambrian was further confirmed. We distinguished some new tectonic units such as the Dananhu-Tousuquan island arc at the north, and Aqishan-Yamansu back-arc basin at the south rather than the previous recognized Aqishan-yamansu island arc. The tectonic evolution of Eastern Tianshan in Paleozoic can be divided into five stages ,i.e. oceanic spreading stage, subduction-accretionary stage, back-arc spreading stage, collisional orogenic stage and post-collisional extension stage. While special ore deposits and their association corresponding to each evolution stage were formed. The ore-forming age of Tuwu-Yandong porphyry Cu deposits are Early Carboniferous in accretionary arc selling, while Huangshan-Xiangshan mafic-ultramafic Cu-Ni deposits are formed in Early Permian in syn- or early post-collisionul settings. Some controversy reminded to further approach is also suggested.