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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。
In this paper, the apatite fission track analysis is applied to the geothermal evolution in the western shelf of the northern South China Sea. The results of apatite track measurements of thirteen samples from three wells in Beibu Gulf Basin, Yingqiong Basin and Zhu San Depression are reported. According to the study of the thermal evolution history of Wu 16-1-2 well and Ying 1 well, it is found that the geothermal evolution in Wu 16-1-2 well is stable since 30 Ma and has not been disturbed by heavy thermal events. The Ying 1 well area has experienced the assertion of the uplift event. The conclusion of the study is verified by means of the track theory model calculation. The significance of track analysis for the thermal evolution of the South China Sea shelf basin is affirmed, and the improvement on the rock sample is pointed out.