【摘要】 <正> 1972年4月我所与湖北地质科学研究所部分同志共同写了“南岭及其邻区花岗岩同位素年龄的研究”一文,主要是谈花岗岩时间和空间分布关系。不少兄弟地质单位给予我们很大支持和鼓励。另一方面,不少同志对文章内所提海西期花岗岩的存在和三个时代岩带中第二带以燕山早-中期花岗岩为主的观点提出了宝贵意见。回忆起过去工作中遇到的问题,联想到南岭花岗岩在生产上和理论上的重要性,感到迫切需要解决时代划分和分期问题。更多还原

【Abstract】 Based upon the present research stratus on Nan Ling granites and in the view of the defferences in the opinions on the ages and periodic division of Nan Ling granites existing among some research units concerned, a proposal has been submitted in the paper, pointing out that it is quite necessary to launch a discussion in the deeper-going way on the problem involving the ages of Nan Ling granites and their periodic division in the journal "GEOCHIMICA". The main topics expected to be discussed are as follows:(1) The existance of Hercynian granites and the possibility of the formation of non-orogenic granites;(2) The divisional boundary between Yenshanian and Indonsinian granites and their distributional characteristics;(3) The periodic sub-division of Yenshanian granites and their relationship with mineralization;(4) The division of the ages of granites older than the Caledonian period.更多还原