伊利石K-Ar测年在确定油气成藏期中的应用

利用伊利石K Ar测年确定油气成藏期 ,能够得出其绝对年龄 ,因而备受人们重视。可是在解释K Ar测年资料时 ,存在一些问题和假设。如果解释者对这些问题和假设没有足够的认识 ,其解释结果就会有误。文中以几个具体实例讨论了利用伊利石K Ar测年确定成藏期时对油气的充注时间和特征进行正确解释的方法

APPLICATION OF K-Ar DATING TECHNIQUE TO DETERMINATION OF TIMING OF OIL/GAS ENTRAPMENT

Determination of the timing of oil/gas entrapment is of great practical significance in guiding oil and gas exploration. Numerous methods have been developed to accomplish this task. K\|Ar dating of illite is just one of them. Since this technique can yield an absolute age, it has received a greater attention. However, there exist certain problems and assumptions associated with the K\|Ar dating technique in interpretation of the dating data, which may lead to incorrect conclusions. This paper documents these problems and assumptions, gives several examples involving K\|Ar dating data, and discusses the application of K\|Ar dating data to the interpretation of the timing and nature of hydrocarbon charging of reservoirs.