西北地质2017，Vol.50Issue(1)：63-77,15.
内蒙古北山地区小红山钒钛磁铁矿成岩成矿过程探讨
The Diagenetic Mineralization Process of the Xiaohongshan Vanadium-bearing Titanometite in the Beishan Area of Inner Mongolia
摘要
Abstract
The Xiaohongshan mafic intrusion, located in Beishan area of Inner Mongolia, was controlled by the nearly east-west deep faults of Hongliuhe-Niuquanzi-Xichangjing suture belt, which is mainly composed of gabbro, bojite and hornblende pyroxenolite.The middle-size V-Ti-Fe deposit was occurred in hornblende pyroxenolite, with a certain degree of mineralization in bojite, without any mineralization information in gabbro.Diagenesis and mineralization were occurred in the local tensile condition under thesubduction and extrusion environment of active continental margin,and the related rocks were formed in (424.6±6)Ma.The geochemical results show that these rocks have low alkali,aluminum and silicon, as well as high phosphorus, titanium and vanadium, which are benenfit for Mineralization.Their rocks have higher ∑REE values, which were enriched in LREE and depleted in HREE, with negative Eu anomalies.Their trace elements have the negative anomalies of Rb-Ba, Nb-Ta, Sr and Zr-Hf.Thus, the mineralization was occurred in the late magmatic evolution,which had experienced three stages, such as magmatic differentiation, ore pulp injection and ore-enriched hydrothermal activity.And then, a large number of Fe-Ti oxides were melted and separated in the stage of forming hornblende and apatite.关键词
钒钛磁铁矿/岩石地球化学/岩浆演化/成矿动力学背景/小红山辉长岩体Key words
vanadium-bearing titanometite/geochemistry/magma evolution/metallogenic dynamics background/the gabbro of the Xiaohongshan分类
天文与地球科学引用本文复制引用
张国鹏,谢春林,赵寒森,马泽民,王锡超,潘旗旗..内蒙古北山地区小红山钒钛磁铁矿成岩成矿过程探讨[J].西北地质,2017,50(1):63-77,15.基金项目
中国地质调查局"甘蒙北山大口子-骆驼泉地区矿产远景调查"(12120113046600) （12120113046600）
