摘要：
对赣东北蛇绿混杂岩带相关地层的时代、沉积相和接触关系等方面认识的重大分歧，导致对华南地质演化史的不同解释。混杂岩的深成岩块体的同位素年龄数据大都在900～1000Ma之间，伴生的火山－沉积岩系（登山群）中却有古生代微体化石发现，但化石的确切年代尚难确定。古地理分析表明，赣东北地区早古生代并不存在“江南古陆”，却有深水的江南海盆。华南晚奥陶世火山碎屑沉积广泛分布，但来源不明，赣东北有可能为当时喷发中心，形成于火山岛弧环境的登山群正好与之匹配。因而，其时代可能为晚奥陶世。志留纪早期江南海盆封闭，扬子地块和华夏地块之间形成加里东褶皱带，赣东北蛇绿岩带为加里东褶皱带和华夏地块之间的接合带。这里扬子地块和华夏地块的距离最近，挤压程度高，抬升幅度大，剥蚀时间长，早古生代沉积不易保存，登山群可能是残留部分。
Abstract:
The different views on the age, lithofacies and contact relationship of the strata related to the ophiolite melange belt in northeastern Jiangxi Province lead to the different explanations on the history of geological evolution of South China. The isotopic ages obtained from igneous blocks of the melange were mostly between 900 to 1000 Ma. On the other hand, some Paleozoic microfossils were found from a volcanic-sedimentary sequence (Dengshan Group) associated with the ophiolitic belt, but the exact ages of those fossils could not be determined. The paleogeographic analysis indicates that in Early Paleozoic there was not a “Jiangnan Paleocontinent”, but a deep-water “Jiangnan Basin” in northeastern Jiangxi Province . Late Ordovician pyroclastic deposits widely spread in South China, but their source is still unclear. Based on the lithofacies paleogeographic analysis, the eruptive center probably located in northeastern Jiangxi at that time, that just matched with the Dengshan Group formed in the volcanic island-arc environment. So that implies the Late Ordovician age to the Dengshan Group. In early Silurian the Jiangnan Basin closed and a Caledonian fold belt formed between the Yangtze Block and Cathaysian Block. The ophiolitic belt in northeastern Jiangxi Province was a suture between the fold belt and the Cathaysian Block. Here the distance between the two blocks are smallest in South China and rocks were strongly compressed, resulting in major uplift and stronger erosion. Therefore, Lower Paleozoic were difficult to be preserved in the area, and the Dengshan Group was just their remains.
Wu Haoruo. 赣东北蛇绿岩带相关地质问题的构造古地理分析[J]. 古地理学报, 2003, 5(3): 328-342.
吴浩若. TECTONOPALEOGEOGRAPHIC ANALYSIS OF THE GEOLOGIC PROBLEMS RELATED TO OPHIOLITIC BELT IN NORTHEASTERN JIANGXI PROVINCE[J]. JOURNAL OF PALAEOGEOGRAPHY, 2003, 5(3): 328-342.