In this investigation, the facies and their usage in the environment of cretaceous rocks that crop out at 35 km south-east of Golpayegan is studied. The section with 811 m thickness is composed of compact, dark marly shale, shale dark sandstones, orbitolina-contained limestone, marly limestone and calcareous limestone of early cretaceous (Albian), and dark gray limestone marly limestone of late cretaceous ages. Field and microscopic (petrographic) studies lead to recognition of 7 carbonate and 2 clastic facies. Facies 1 (Bioclast lime mudstone) indicates medium open marine environments. Facies 2 (Bioclast wackestone). Facies 3 (Peloid wackestone), Facies 4 (Bioclast packstone), Facies 5 (Bioclast packstone), Facies 6 (Intraclast packstone) and Facies 7 (Lime mudstone) indicate shallow to medium (sub-tidal) inter-tidal and supra-tidal deposition. In some cases, such as Facies 8 (Lime mudstone) and Facies 9 (Sandstone) Facies refer to a clastic condition which has direct relationship with active tectonic periods. Meanwhile in normal cases, Facies 4, 5 and 6 Facies are representative of carbonate basin in shape of homoclinal ramp.
کلید واژگان :facies, environment of cretaceous rocks, Golpayegan Region
ارزش ریالی : 300000 ریال
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جزئیات مقاله
- کد شناسه : 2148663516843242
- سال انتشار : 2014
- نوع مقاله : پذیرفته شده در سایر مجلات علمی معتبر و علمی مروری و ISC
- زبان : انگلیسی
- محل پذیرش : European Online Journal of Natural and Social Sciences
- برگزار کنندگان :
- ISSN : 1805-3602
- تاریخ ثبت : 1395/11/21 13:42:48
- ثبت کننده : سید علیرضا آشفته
- تعداد بازدید : 204
- تعداد فروش : 0