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湘东北幕阜山地区位于扬子准地台中的江南地轴与下扬子拗陷的交接处。幕阜山花岗岩体产于湘、赣、鄂三省交界的幕阜山区,产出面积约2360 km2,该岩体形似一菱形,呈北西-南东向延伸,岩体与围岩的接触均向四周倾斜,西南、西北缓,东南、东北陡,侧伏于西南,属中深成相侵入体,该岩体由南江桥,月田,黄龙山,凤凰山等若干个燕山期同源同期多次侵入阶段的复式岩体。从岩性角度来看,南江桥岩体主要以黑云母花岗闪长岩、黑云母二长花岗岩到二云母花岗岩为,
The northeastern Hunan Mufushan area is located at the junction of the Jiangnan axis and the Lower Yangtze depression in the Yangtze Platform. The Mufushan granite is produced in the Mufu Mountain area at the border of Hunan, Jiangxi and Hubei Provinces and has an output of about 2360 km2. The rock mass is shaped like a rhombus and extends north-south-eastward. The contact between the rock mass and the surrounding rock It is surrounded by the southwest, slow in the northwest, southeast, northeast steep, lateral volts in the southwest, is a deep intrusion, the rock body by the Nanshanqiao, Yuetian, Huanglong Mountain, Phoenix Mountain, a number of Yanshan period more than the same period Sub-invasion phase of the complex rock mass. From a lithological point of view, the Nanjiangqiao pluton is dominated by biotite granodiorite, biotite monzogranite to dike mica granite,