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打古寨花岗岩体位于江西宁都北部,是桃山复式花岗岩体的一个组成部分,面积约30km。由于岩体中广泛发育交代作用和岩石普遍具片麻状构造;岩体中黑云母和锆石同位素年龄值与岩体侵入时代不相适应;更由于该岩体中盛产铀矿,工作程度较高,积累的地质资料比较丰富,因此对岩体时代、成因和产状看法甚多,如:花岗岩化成因花岗岩;同构造侵入花岗岩,自变质花岗岩和挤压变质花岗岩等。
The Daochaizhai granite body is located in the north of Ningdu, Jiangxi and is an integral part of the Taoshan composite granite body with an area of about 30km. Due to the widespread development of metasomatism in rock mass and the general occurrence of gneiss in the rocks, the age values of biotite and zircon isotopes in rock mass are incompatible with the age of intrusion of rock mass. More importantly, because the rock mass is rich in uranium ore, Therefore, there are many views on age, genesis and genesis of the rock mass, such as granitic-genesis granite, intrusive granite, metamorphic granite and crushed metamorphic granite.