岩石矿物学杂志2018，Vol.37Issue(1)：99-114,16.
新疆阿尔泰什根特铁矿床地质特征及成矿机制
Geological characteristics and metallogenic mechanism of the Shigente iron deposit in Altay, Xinjiang
摘要
Abstract
The Shigente iron deposit is hosted in the volcano-sedimentary rocks of the Kangbutiebao Formation.The orebodies occur in bedding,lenticular,and vein forms,bounded by the strata.Skarnization and magnetite mineralization are both present in the ore district.The ore-forming process can be divided into volcanic sedimentary (the main mineralization period),magmatic hydrothermal (skarn-type mineralization period),and regional metamorphic periods.Magnetite in the volcanic sedimentary period and the retrograde alteration stage of the magmatic hydrothermal period is rich in Fe and depleted in Si,Ti,V,Mg,Mn.The chondrite-normalized REE patterns and primitive mantle-normalized trace element spider diagrams of magnetite show similar characteristics,which indicates that the iron mineralization in the volcanic sedimentary period and the retrograde alteration stage had the same metal source,namely the marie volcanic rocks.Homogenization temperatures of fluid inclusions of garnets at the early skarn stage vary from 160 to 403℃,generally in the range of 180 to 260 ℃.Salinities range from 5％ to 9％ NaCleq;δD values range from-134‰ to-125‰,and δ18OH2O values are between 4.7‰ and 8.6‰,implying that the fluids were derived from magmatic fluids.Homogenization temperatures of fluid inclusions in the quartz-carbonate stage vary from 140 to 536℃,mainly in the range of 160 to 340℃,and the salinities range from 6％ to 16％ NaCleq,which indicates that the fluids are characterized by the evolution from high to low temperatures,moderate-low salinities,and moderate-low densities.δD values of quartz range from-98‰ to-95‰,and δ18OH2o values are between-0.6‰ and 2.0‰,showing that the fluids in this stage were derived from magmatic fluids,with some contributions from the meteoric water.关键词
铁矿床/地质特征/成矿机制/什根特/阿尔泰/新疆Key words
iron deposit/geological characteristics/metallogenic mechanism/Shigente/Altay/Xinjiang分类
天文与地球科学引用本文复制引用
李彦,杨成栋,谷高中,韩伟鹏,李强,王旭..新疆阿尔泰什根特铁矿床地质特征及成矿机制[J].岩石矿物学杂志,2018,37(1):99-114,16.基金项目
National Key R&D Program of China (2017YFC0601201) （2017YFC0601201）
Xinjiang Altay Region Resources Compensation Fund Projects 国家重点研发计划(2017YFC0601201) （2017YFC0601201）
新疆阿勒泰地区资源补偿奖励资金项目 （）
