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The AAPG/Datapages Combined Publications Database
Environmental Geosciences (DEG)
Abstract
Environmental Geosciences, V.
DOI: 10.1306/eg.01241817012
Facies associations and chemostratigraphy of the Lower Cretaceous Kurnub Group and their boundaries, King Talal Dam section, northwestern Jordan
Sherif Farouk,1 Hashem Al-Zubi,2 Tarek Abdelkader,3 and Fayez Ahmad4
1Exploration Department, Egyptian Petroleum Research Institute, 1 Ahmed El-Zomor, Hay El-Zohour Square, 11727 Nasr City, Cairo, Egypt; [email protected]
2Ministry of Energy and Mineral Resources, Building 7, Zahran Street, As-Suwayfiyya Area 140027, Amman 11814, Jordan; [email protected]
3Geology Department, Faculty of Science, Tanta University, El-Gaish, Tanta Qism 2, Gharbia Governorate, 31527 Tanta, Egypt; [email protected]
4Department of Earth and Environmental Sciences, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan; [email protected]
ABSTRACT
Integrated petrographic and chemostratigraphic studies have enabled the identification of 
sequence
boundaries, sequence stratigraphy, and their system tracts for the Lower Cretaceous strata of the Kurnub Group (Jordan); the latter is underlain by the Jurassic (Callovian) strata and overlain by the Cretaceous (Cenomanian). Based on physical characteristics (sharp vertical facies changes) and geochemical parameters (SiO2/Al2O3, K2O/Al2O3, TiO2/Al2O3, Sr/Ca millimoles per mole, Mn parts per million, and the minor elements), 4 sequence
boundaries are identified, associated with 11 facies types (from alluvial plain to the intertidal environment) and 9 system tracts, thus enabling the identification of record Lower Cretaceous sea-level fluctuations. The identified sequences mirror the Arabian plate sequences and suggest a eustatic origin. The siliciclastic Kurnub Group was derived mainly from felsic granite–gneiss and metasedimentary rocks (Arabian shield) and was deposited in a passive continental margin setting under semiarid-to-humid climatic conditions.
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