方城双山碱性正长岩型铌矿地质特征及找矿方向  

The Geological Characteristics of Alkaline Syenite Nb-ore and Prospecting Direction in Shuangshan, Fangcheng County, Henan

作　　者：程兴国 刘文斌[2] 

机构地区：[1]河南省地质科学研究所,河南郑州450001 [2]河南省地质调查院,河南郑州450001

出　　处：《资源导刊（地球科技版）》2015年第2期21-24,共4页

摘　　要：双山碱性正长岩体，分布于河南方城县北部12km的杨集乡大庄一带，呈小岩株产出，岩体片麻理发育，变质程度为低绿片岩相-高绿片岩相。通过对其地质特征及铌钽等稀有金属含矿性调查研究，认为正长岩体普遍存在有铌矿化，其中霞石正长岩为成矿母岩，全岩矿化明显，即岩体就是铌矿体。并伴有钽、铷、锆、轻稀土金属矿化，可综合回收利用。经初步预测，该区铌远景资源量（Nb2O5）可达大型矿床规模（20万t）。Shuangshan rock-mass of alkaline syenite is distributed in Yangji town, 12 km north of Fangcheng County, Henan. The rock-mass is gneissic growth, small rock strain output, and the metamorphic grade is low greenschist facies to high greenschist facies. Based on investigating and researching on the geological characteristics of Nb-Ta and rare-metal ore, the syeniteis are rich with Nb mineralization, in which the nephelinesyenite are the ore-forming parent-rock, whole rock mifleralization is obvious; The syenite accompanied by Ta, Rb, Zr, light rare-earth metal mineralization, and it is comprehensively recyclable. By preliminarily forecasting, the Nb-ore resources （Nb205） are in large-scale （200,000 ton） in this area.

关 键 词：方城县 碱性正长岩型 铌矿 地质特征 找矿方向 

分 类 号：P588.15[天文地球—岩石学]