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本文通过构造—岩性法填图将浙南出露的陈蔡群划分为四段;龙泉群自下而上划分为汤源组、万山组、青坑组和南弄组。陈蔡群的全岩Rb—Sr等时年龄为1498Ma和1813Ma,时代相当于早—中元古代;龙泉群的全岩Rb—Sr等时年龄为531Ma和571Ma,应为晚元古代。陈蔡群系闽北麻源群的自然延伸;龙泉群可与闽北的震旦系变质岩对比。
This paper divides the Chencai Group which is exposed in southern Zhejiang into four sections by tectonic-lithological mapping. Longquan Group is divided into Tangyuan Formation, Wanshan Formation, Qingkeng Formation and Nannong Formation from bottom to top. The whole rock Rb-Sr isochron age of 1498Ma and 1813Ma in Chencai Group is equivalent to the Early-Mesoproterozoic. The Rb-Sr isochron age of Longquan Group is 531Ma and 571Ma, which should be Late Proterozoic. Chen Caiqun is a natural extension of Mayuan Group in Northern Fujian; Longquan Group can be compared with Sinian metamorphic rocks in Northern Fujian.