نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، گروه زمین شناسی، دانشکده علوم، مجتمع آموزش عالی گناباد، گناباد، ایران
2 استادیار چینه شناسی، گروه زیست شناسی، دانشکده علوم، دانشگاه مراغه، مراغه، ایران،
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The Amiran Formation with the age of Upper Maastrichtian - Paleocene is spread of in Lorestan region, Zagros sedimentary basin. The purpose of this research is to investigate the clay minerals for interpreting climatic conditions and the history of burial diagenesis of the Amiran Formation in southwest of Lorestan based on XRD، SEM and petrographic studies. In this regard, a stratigraphic section (Pirshamsoddin section) has been measured and sampled. The thickness of this section is 920 meters. The lower boundary of this formation is gradual with Gurpi Formation and its upper boundary with Kashkan Formation is erosion. XRD analysis has identified the minerals illite, muscovite, paragonite, palygorskite, nantronite, margarite, montmorillonite, and chlorite. Illite and chlorite are the most abundant clay minerals. The diagenetic processes affecting siliciclastic rocks include cementation, compaction, Dissolution and replacement. Chemical processes, such as the formation of stylolites, are also notable.
کلیدواژهها [English]
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