新疆和静县查岗诺尔铁矿床FeⅠ矿体围岩蚀变特征

摘要

The Chagannur ore deposit lies in the northern part of the Ili block, just in Bonohonu island arcbelt and belongs to the east of Awulale metallogenic belt.There are lots of deposits in Awulale metallogenic belt, such as gold mineralization, copper mineralization, lead mineralization, zinc metallogenic and iron metallogenic.Dahalajunshan formation and Yishijilike fornmation is mainly volcanic rocks in mine area, with fault contact relationship between them.Alteration of wall rock is widely distributed in mine area.There are lots of alteration zones along the fracture because of multi-activity of ore magma.The study results show that from east to west, there are garnet belt, epidote-actinolite belt,actinolite-magnetite belt, alternating griotte belt and actinolite rock.And three period of alteration caused these belts.Symbiotic combinations of the various stages of minerals are: magnetite + diopside + garnet ;magnetite + actinolite + epidote; magnetite-garnet-actinolite-epidote-quartz-carbonate salt.The mining alteration is formed by high, middle temperature volcanic hydrothermal liquid and acidic volcanic rocks.%新疆和静县查岗诺尔铁矿床位于伊犁微板块北缘之博洛科努早古生代岛弧带,属于阿吾拉勒金、铜、铅、锌、铁成矿带东段.矿区出露地层主要为下石炭统大哈拉军山组火山岩和上石炭统伊什基里克组火山岩,两者为断层接触关系.由于成矿矿浆的多期次活动,查岗诺尔铁矿广泛发育围岩蚀变,形成沿断裂带分布的带状蚀变带.通过研究发现,矿床主矿体Fe Ⅰ号主矿体的围岩蚀变情况,按不同蚀变矿物组合,自东向西可分出石榴石带、绿帘石-阳起石带、阳起石-磁铁矿带、蚀变大理岩带和阳起石带,对应三期蚀变作用.各阶段的矿物共生组合分别为:磁铁矿+透辉石+石榴石、磁铁矿+阳起石+绿帘石、磁铁矿-石榴石-阳起石-绿帘石-石英-碳酸盐.矿区蚀变是由高、中温火山热液交代中酸性火山碎屑岩而形成.