【摘要】：在文昌組和恩平組層序細(xì)分的基礎(chǔ)上,對西江主洼主干斷層的古近紀(jì)活動強(qiáng)度進(jìn)行了分析;并且在此基礎(chǔ)上利用平衡剖面技術(shù)對洼陷的主干剖面進(jìn)行了構(gòu)造演化恢復(fù)。認(rèn)為:1 NE向的F1號斷層是區(qū)域性的控洼斷層,對沉積充填及構(gòu)造演化有重要作用;2多數(shù)主干斷層在文昌期活動性較強(qiáng),在恩平期活動較弱;3西江主洼構(gòu)造演化階段可分為初始斷陷期、強(qiáng)烈斷陷期、斷拗過渡期和熱沉降期,其中初始斷陷期和強(qiáng)烈斷陷期對于洼陷的形成、擴(kuò)張以及沉積充填有十分重要的意義。
[Abstract]:On the basis of sequence subdivision of Wenchang formation and Enping formation, the Paleogene activity intensity of the main faults in Xijiang main depression is analyzed, and the tectonic evolution of the main section of Xijiang main depression is restored by using equilibrium profile technique. It is considered that: (1) the F1 fault in the direction of NE is a regional controlled depression fault, which plays an important role in sedimentary filling and structural evolution, (2) most of the main faults have strong activity in Wenchang period and weak activity in Enping period, and (2) most of the main faults have strong activity in Wenchang period and weak activity in Enping period. (3) the tectonic evolution stage of Xijiang main depression can be divided into initial fault depression stage, strong fault depression period, fault depression transition period and heat sink period, in which the initial fault depression period and strong fault depression period are of great significance to the formation, expansion and sedimentary filling of the depression.
【作者單位】： 中海石油(中國)有限公司深圳分公司;
【分類號】：P618.13;P542

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