【摘要】 善安浜地区钽矿找矿的突破,是江苏省地质调查研究院近几年开展国土资源大调查所取得的重大成果。该矿床为碱性长石花岗岩型钽矿床。矿体赋存在隐伏花岗岩体隆起部位的顶部,自上而下分为三个矿体,呈上钽下铌关系产出。矿石类型主要为钠长石花岗岩型,次为少量花岗伟晶岩型。矿石主要有益组分为钽、铌,伴生有益组分为锂、铷、铯、锆、铪。钽、铌主要赋存在铌铁矿—钽铁矿中,铌铁矿—钽铁矿主要嵌布在长石、石英等矿物颗粒间,矿石可选性好。估算的资源量:钽达超大型矿床规模,铌达中型矿床规模。该矿床的发现不仅对苏州西部稀有金属矿地质找矿有重要指导意义,亦为平原区隐伏矿床的找矿研究提供了典型实例。更多还原

【Abstract】 The breakthrough in searching for Ta deposit in the Shananbang area is a significant achievement among the macro-survey projects of national land resources undertaken by Geological Survey of Jiangsu province in recent years. The deposit is an alkali-feldspar granite type Ta deposit. The orebodies are hosted in the top of the doming part of the buried granite mass, and can be divided into three independent orebodies from the upper to the lower with consistent of Ta to Nb existence. The main ores are as albite granite type, fewer as granite pegmatite type. The chief useful component in the ores are Ta and Nb, associated useful component are Li, Rb, Cs, Zr, and Ha. Ta and Nb occur in tantalite and columbite minerals, and tantalite and columbite are embedded among the particles of feldspar and quartz in the rocks. The ores are east to be separated. It is estimated that total resources of Ta ore can reaches to ultra-megascope, and Nb ore to mesoscope. The discovery of the deposit not only can be used as guidance in searching for rare metal minerals in western part of Suzhou, but also provides a typical example for geological prospecting research on buried deposits in plain area.更多还原