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笔者对沧参1井石炭、二叠纪地层中的粘土矿物特征进行研究,并对不同深度的粘土矿物进行了K-Ar、40Ar-39Ar及Rb-Sr法同位素地质年龄测定,得出至少存在三期伊利石的结论;碎屑伊利石,年龄为400Ma左右,在235—243Ma时受到热扰动;海西期末一印支早期形成的高温伊利石,其年龄为214—234Ma,在145Ma时经受一次热扰动;早侏罗世时期形成的伊利石,年龄为180Ma左右,分布比较普遍。这一研究结果无疑将有助于深入探讨区域地热场的演化,以及进一步研究有关地层的生、储油气能力。
The authors studied the characteristics of clay minerals in the Carboniferous and Permian strata in Cang Shen 1 well and carried out the isotopic geological age determination of K-Ar, 40Ar-39Ar and Rb-Sr for clay minerals with different depths, Third-stage illite; detrital illite with an age of about 400Ma and thermal perturbation at 235-243Ma; high temperature illite formed at the end of Hercynian-Indosinian period with an age of 214-234Ma and experienced at 145Ma A thermal disturbance; illite formed in the early Jurassic, age about 180Ma, the distribution is more common. The results of this study will undoubtedly help to further explore the evolution of geothermal fields in the region and further study on the formation and accumulation of oil and gas in the strata.