南岭花岗岩时代和分期讨论结果的综述

AGE AND TIME DIVISION OF GRANITES IN NANLING REGION,SOUTH CHINA——A REVIEW

This paper is a summation of the discussions held since 1976 under this topic.Zonation and the unbalance rules regarding temporal and spatial distribution of granites,the relationship between granite formation and crust movement, the series of mineralization and the cyclic nature of granitic magmatism are dealt with followed by a preliminary time division of granites based on our study. Nanling granites are classified into three broad categories, i.e., the Precambrian, Paleozoic and Mcsozoic granites.On the basis of geological setting, stratigraphieal evidence, isotopic age, spatial distribution, petrology, trace elements and accessory minerals the following subdivisions are suggested for Nanling granites: Szupunian (1063--1400my), Hsuehfangian (570--900my), early Caledonian (400--570my), late Caledonian (360-400my), Hercynian(230--360 my), Indosiuian (195±5--230 my), early Yenshanian (140±5-195±5 my).and late Yenshanian (70-140±5 my).

This paper is a summation of the discussions held since 1976 under this topic. Zonation and the unbalance rules regarding temporal and spatial distribution of granites, the relationship between granite formation and crust movement, the series of minera-lization and the cyclic nature of granitic magmatism are dealt with followed by a pre-liminary time division of granites based on our study. Nanling granites are classified into three broad categories, i.e.?the Precambrian, Paleozoic and Mesozoic granites. On the basis of geological setting, stratigraphical evidence, isotopic age, spatial distri-bution, petrology, trace elements and accessory minerals the following subdivisions are suggested for Nanling granites: Szupunian (1063-1400my), Hsuehfengian (570-900 my), early Caledonian (400-570my), late Caledonian (360-400my), Hercynian (230-360 my), Indosinian (195 ± 5-230 my), early Yenshanian (140±5-195 ±5 my), and late Yenshanian (70-140 ± 5 my).