ELEMENT ENRICHMENTS IN BITUMINOUS ROCKS, HATILDAĞ FIELD, GÖYNÜK/BOLU

Authors : Ali SARI, Murad ÇİLSAL, Şükrü KOÇ

Pages : 109-120

Doi:10.19111/bmre.23087

View : 25 | Download : 16

Publication Date : 2015-06-30

Article Type : Research Paper

Abstract :In this study, element enrichments in bituminous rocks (bituminous shale, bituminous clays- tone and bituminous marl) of the Kabalar formation in the Hatıldağ field in Göynük town of the city of Bolu are investigated and their economic potential is discussed with regard to being a mineral deposit. Element analysis was conducted with ICP-ES (ICP emission spectrometry) and ICP-MS (ICP mass spectrometry) techniques. Organic carbon content in rocks was analyzed with Rock-Eval VI device. In pyrolysis analysis conducted on a total of 28 bituminous rocks that are collected from the Kayalık Dere measured stratigraphic section, Corg minimum and maximum are 0.40 %wt and 8.25 %wt, respectively (with average of 3,6  %wt). Major and trace elements analyzed were compared with those of Peru Continental Shelf Sediments, Namibia Continental Shelf Sediments, Gulf of California Sediments, Me- diterranean Sapropels, Black Sea Sapropels, Cenomanian/Turonian (C/T) Demerara Rise Anoxic Sediments and C/T Gubbio Anoxic Sediments which are known to be deposited under anoxic conditions. In the studied samples, enrichment levels of major and trace element con- tents are determined with respect to average shale. Fe, Mg, Ca and K of the major elements and As, Ba, Co, Cu, Ni, Rb, Sr, V, Zn and Zr of trace elements were found to be more enriched with respect to basins compared. Higher concentrations of Ca, Mg and Ba elements in the studied samples indicate that depositional environment in Hatıldağ is more carbonaceous and suboxic.
Keywords : Encrichment, Redox, Oxic, Suboxic, Anoxic, Sulfidic Environment