关于江西花岗质岩石的时代及分期

ON AGE-DIVISION OF GRANITIC ROCKS OF JIANGXI

Granitic rocks are widespread n Jiangxi, constituting an important part of Nanling granites. It is snggested that they are genetieally related to ore genesis, A great deal of work had been dons by many geologists before and after liberation,but the problem concerning their age division still open to eontrovasy, The authors propose in this paper an age-division ssbeme for Jiangxi granitic rocks in an attempt to shed much light on the following problems,1, The age-divlsion of pro-Caledonian granites; 2: The existence of Varisian granites and their position in the age-division;3, The upper and lower limits of Indosinian Cyele and the distribution patterns of granites belonging to the cycle; and 4. The sub-division of Yenshanian granites.

Granitic rocks are widespread in Jiangxi, constituting an important part of Nanling granites. It is suggested that they are genetically related to ore genesis. A great deal of work had been done by many geologists before and after liberation, but the problem concerning their age division still open to controvasy. The authors propose in this paper an age-division scheme for Jiangxi granitic rocks in an attempt to shed much light on the following problems: 1. The age-division of pre-Caledonian granites; 2. The existence of Varisian granites and their position in the age-division; 3. The upper and lower limits of Indosinian Cycle and the distribution patterns of granites belonging to the cycle; and 4. The sub-division of Yenshanian granites.