中文摘要：

测试了四川盆地东部L2井三叠系飞仙关组碳酸盐样品^87Sr／^86Sr比值，以及相应的Mg，Sr和Mn的含量。在对样品进行成岩蚀变性评价的基础上，根据锶同位素地层学的原理，尝试对这些样品进行了年龄标定。4个样品分别位于L2井深度为3297．6m，3290．0m，3268．8m和3201．6m处;其^87St／^86Sr比值分别为0．707330，0．707340，0．707348和0．707383；年龄的标定结果分别为245．3Ma，245．2Ma，245．1Ma和245．0Ma。除深度3201．6m的样品园成岩蚀变，其年龄值的可靠程度较低以外，其余3个样品的年龄值都具有较高的可靠程度。

英文摘要：

^87Sr/^86Sr ratios of the 4 carbonate samples collected from the Triassic Feixianguan Formation, Well Luojia 2, Eastern Sichuan were measured. The Sr concentrations of the 4 samples are 1 080～3 100 ppm （average 1 795 ppm）, Mn 6. 2442 ppm （average 16.3 ppm）, and Mn/Sr 0. 007 40. 039 （average 0. 013）, so, it is thought that they contain information on the original seawater strontium isotope composition. According to the principle of strontium isotope stratigraphy, the authors attempt to calibrate the ages of the samples. 4 samples are located at the well depths of 3 297.6 m, 3 290.0 m, 3 268.8 m and 3 201.6 m, corresponding ^87Sr/^86Srratios are 0.707 330, O. 707 340, 0. 707 348 and 0. 707 383, and the ages calibrated are 245.3 Ma, 245.2 Ma, 245.1 Ma N1 245.0 Ma, respectively. The age calibrated of the sample with a depth 3201. 6 m, because of its higher Mn concentration （42 ppm）, has lower reliability, but the ages calibrated from the other 3 samples are believed reliable.