南海北部陆架西区磷灰石裂变径迹的分析

Apatite Fisson track Analysis in the West Region of North Shelf in South China Sea

文中将磷灰石裂变径迹分析用于南海北部陆架西区地热演化研究，报道了位于北部湾盆地、莺琼盆地和珠三拗陷的３口钻井１３个样品磷灰石径迹的测定结果，并依之研究了乌１６－１－２井与莺１井的热演化史的片断，得出乌１６－１－２井区在３０Ｍａ以来地温演化是平稳的，未受过重大热事件的扰动，而莺１井区则曾经历过抬升事件的论断。对所得结论借助于径迹理论模型计算予以检验，肯定了径迹分析用于南海陆架盆地热演化研究的意义，指出在采取岩样问题上有待改进之处。

It is tried to apply apatite fission track analysis (AFTA) to thermal evolution history research for the sedimentary basins in the west region of north shelf in South China Sea. AFT measurements of 13 samples from boreholes have been reported. Based on the measurements several pieces of thermal evolution history on Wu 16 1 2 and Yeng 1 boreholes are studied leading to the judgements that Wu 16 1 2 borehole location had not been disturbed by major thermal event and thermal evolution was rather steady since 30 Ma,while Yeng 1 borehole location had been raised in era between Late Pliocene and Quaternary. The gained conclusions have been checked by means of a theory model calculating fission track using computer. At last of the paper, it is confirmed that the application of AFTA method for study of thermal evolution in the west region of north shelf in South China Sea is successful and it is also pointed out that the problems about selecting rock samples need to be further improved.