论文部分内容阅读
卢氏南部灰池子花岗岩东部倾没端形成伟晶岩密集带,依次可分出黑云母伟晶岩带、二云母伟晶岩带、白云母伟晶岩带。现知白云母矿化脉77条,矿脉19条。矿脉长32—180米,厚6—10米,矿体一般长20—90米,厚1—3米,矿脉分异良好,均为全分异和粗粒—小块体结构伟晶岩。以中粗粒夹小块体结构水解型白云母分布最广、质量最佳,次为块体间隙气成型白云母亦具工业意义。白云母品位一般3—6kg/m~2,工业原料云母三,四类占85％以上。6号以上厚片云母约占27％。河西背斜控制了伟晶岩脉的展布,与区域构造线呈5—30°夹角的压扭性裂隙则为矿脉赋存的有利场所。根据伟晶岩与灰池子花岗岩在空间展布、副矿物成分和同位素年龄的一致性及化学成分有规律地变化,说明两者密切的成因联系
Pegmatite-intensive belt is formed at the dumping site of the eastern part of the limestone granite in the southern part of the Lushi area, which in turn can be divided into biotite pegmatite belt, mica pegmatite belt and muscovite pebble belt. Are now known muscovite mineralized vein 77, veins 19. Veins 32-180 meters long, 6-10 meters thick, generally 20-90 meters long ore body, 1-3 meters thick, well-differentiated veins, are all differentiated and coarse-grained - small pegmatite pegmatite. In the medium-sized coarse-grained small block structure Hydrolyzed muscovite most widely distributed, the best quality, the second for the gap between the gas-forming muscovite also has an industrial significance. Muscovite grade generally 3-6kg / m ~ 2, industrial mica three or four categories accounted for more than 85%. Thick mica 6 or more about 27%. The Hexi anticline controls the distribution of the pegmatite veins, and the compressive-torsional fractures that form an angle of 5-30 ° with the regional tectonic line provide favorable sites for ore veins. Based on the spatial distribution of pegmatites and Huichizi granites, the consistency of the accessory mineral composition and isotopic ages and the regular change of chemical composition indicate the close genetic relationship between the two