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Geochemistry and Provenance of Maastrichtian Clastic Rocks in the Dikmendede Formation of Orhaniye in Kazan-Ankara-Turkey Region

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Acta Geologica Sinica(English Edition) 2011年第5期85卷 1067-1081+1083+1082页

作者： Ali Mujdat OZKAN Ayla AYAZ-BOZDAG Department of Geological Engineering Faculty of EngineeringSelcuk University

An integrated petrographic and geochemical study of the sandstones of the Maastrichtianaged in the Orhaniye（Kazan-Ankara-Turkey） was carried out to obtain more information on their provenance,sedimentological history and tectonic *** on their matrix and mineralogical content,the Maastrichtian sandstones are identified as lithic arenite/*** Dikmendede sandstones derived from types of provenances,the recycled orogen and recycled *** chemical characteristics of the Dikmendede sandstones,i.e.,fairly uniform compositions,high Th/U ratios（>3.0）,negative Eu anomalies（Eu/Eu* 0.72-0.99） and Th/Sc ratios （mostly less than 1.0）,favor the OUC（old upper continental crust） provenance for the Dikmendede *** SiO2/Al2O3,Th/Sc（mostly<1.0） and La/Sc（<4.0） ratios are;however,slightly lower than typical OUC,and these ratios may suggest a minor contribution of young arc-derived material. The rare earth element（REE） pattern,and La/Sc versus Th/Co plot suggests that these sediments were mainly derived from felsic source *** Dikmendede sandstones have high Cr（123-294 ppm） and Ni（52-212 ppm） concentrations,Cr/Ni ratio of 1.93,and a medium correlation coefficient between Cr and Ni and corresponding medium to high correlation of both（Cr and Ni,respectively） elements with *** relationships indicate a significant contribution of detritus from ophiolitic *** rare earth element data are available for the Dikmendede sandstones,the Eu/Eu*is compared with LaN/YbN. Samples plot in the area of overlapping between continental collision,strike-slip and continental arc *** predominantly felsic composition of the Dikmendede sandstones is supported by the REE plots,which show enriched light REE,negative Eu anomaly and flat or uniform heavy *** Dikmendede sandstones have compositions similar to those of the average upper continental crust and post-Archean Australian *** feature indicates that the sediments were derived mainly from

关键词： Orhaniye Dikmendede sandstone flysch provenans

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Preface

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 I0001-I0002页

作者： Ali Mujdat OZKAN Ayla AYAZ-BOZDAG Department of Geological Engineering Faculty of EngineeringSelcuk University

To establish and consummate the international stratigraphic chart is one of the important missions of the International Commission on Stratigraphy （ICS） and it is also an important basic research of the Earth Sciences. The basic research project ＂research on standard sections and some global standard stratotype-section and points （GSSPs） in China＂ is financially supported by the Ministry of Science and Technology of China and assumed by Institute of Geology, Chinese Academy of Geological Sciences.

关键词： Orhaniye Dikmendede sandstone flysch provenans

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