华南中部赣浙皖相邻区大地构造单元划分及其特征

The feature and division of tectonic units in centre of South China

华南中部赣浙皖相邻区地质构造极为复杂,前人对该区大地构造划分存在许多不同的见解,有的观点之间存在根本性的差别。通过对赣浙皖相邻区内地质资料综合分析研究,提出该区划分为三个Ⅰ级大地构造单元,即扬子地块、华夏地块及扬子地块与华夏地块之间的华南中部中元古代末期造山带;其中华南中部中元古代末期造山带又可进一步划分为乐平—歙县构造混杂岩亚带、万年构造单元、赣东北蛇绿混杂岩亚带、怀玉构造单元、东乡—龙游混杂岩亚带等五个Ⅱ级构造单元。

The geological structure is very complex with a lot of different divisions by geologists in the centre of South China. On the basis of synthetic study on geological data, we suggest that it may be divided into three grade Ⅰ tectonic units, i.e Yangtse bolck, Cathaysian bolck and Middle Proterozoic orogenic belt between the two blocks. The Middle Proterozoic orogenic belt may be divided into five grade Ⅱ tectonic units: LepingShexian tectonic melange subbelt, Wannian tectonic unit, Northeast Jiangxi ophiolite melange subbelt, Huaiyu tectonic unit and DongxiangLongyou melange subbelt.