一、前言沉积岩年龄的直接测定是地质年代学问世以来,特别是六十年代以来 Hurley 等人文章中许多研究工作的主题。虽然沉积岩年龄测定的主要目的旨在确定数字年代地层的年龄,但是已经发表的数据表明,这一目的未必总是能达到的。对于所研究的地层来说,测得的表观年龄常常与所能接受的年龄不同。地球化学,岩石学和构造地质学有助于对火成岩同位素年龄 I. INTRODUCTION The direct determination of the age of sedimentary rocks has been the subject of many studies in the Hurley et al. Article since the advent of geochronology, especially since the 1960s. Although the primary purpose of sediment age determination is to determine the age of stratigraphic layers in the digital age, published data indicate that this may not always be achievable. For the strata studied, the apparent ages measured are often different from the acceptable ages. Geochemistry, petrology and tectonic geology contribute to the age of igneous isotopes