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Title: GEOCHEMISTRY FOR THE PLIOCENE CARBONACEOUS ROCKS FROM SOUTHEASTERN DENIZLI: PROVENANCE SIGNATURE AND TECTONIC SETTING
GEOCHEMISTRY FOR THE PLIOCENE CARBONACEOUS ROCKS FROM SOUTHEASTERN DENIZLI: PROVENANCE SIGNATURE AND TECTONIC SETTING

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D. B. KORALAY;T. KORALAY
10.5593/sgem2019/1.1/S01.026
1314-2704
978-619-7408-76-8
English
19
1.1
Geology
Carbonaceous rocks (bituminous shale, coal, clayey coal, coaly claystone etc.) is an aggregate of heterogeneous materials composed of organic and inorganic substances. The study area is located on the northern boundary of the Cameli-Ac?payam basin (in Southwestern Turkey), filled by thick Neogene sediments comprising local coal/carbonaceous rocks. This study presents geochemical properties of carbonaceous rocks collected from the Yesilyuva town. In this concept, their major and trace element distribution and mineralogical compositions, trace element multi-element patterns were examined to characterize paleo-environment conditions and provenance properties. The total organic carbon (TOC, wt%) content of the Yesilyuva samples varies from 8.8 wt.% to 43.8 wt.%, pointing excellent source rock. Quartz, clay+mica minerals (mostly illite and lesser amount of smectite, chlorite and kaolinite), feldspar, opaque minerals (pyrite and ilmenite) have been determined as mineral matters in XRD analysis. In NASC normalized diagram, there are clear enrichments in Na, Mg, Al, P, K, Ca, Ti, Mn, Fe, Ni and Y elements, whereas depletions in Rb, Sr, Zr, Ba and La elements. The elemental patterns of samples exhibit clear depletions in Sr, Rb, Ba, Pb, Zr, Sc, Hf, Th, U, Cu and Zn elements, while enrichment in Co, Ni, Cr, and Nd elements in PAAS normalized diagram. Although carbonaceous rocks are close to NASC and PAAS values, there are lesser or/negligible amount of depletions in LREE ((La/Sm)NASC=0.48-1.27; ((La/Sm)PAAS=0.39-1.03), HREE ((Sm/Lu)NASC=0.51-1.30; ((Sm/Lu)PAAS=0.46-1.18). Furthermore, all samples have slightly positive Eu anomalies ((Eu/Eu*)NASC=0.61-0.91; (Eu/Eu*)PAAS=0.88-1.38), reflecting alteration of plagioclase in the source rocks. Certain trace element ratios such as Cr/V (3.27-21.49), Y/Ni (0.001-0.0.014), La/Sc (0.17-2.15), Th/Sc (0.08-0.42), Th/Co (0.005-0.037), Th/Cr (0.001-0.004), and Eu/Eu* (0.17-0.29) indicate mafic-ultramafic source, derived from oceanic crust. The carbonaceous rocks have low ICV (3.3-5.4), K2O/Al2O3 (0.034-0.089) and K/Cs (68.41-1660.32) values, low-to-moderate CIA and PIA (24.61-71.49; 23.37-72.75, respectively) values, suggest relatively moderate weathering of the source rock. The SiO2/Al2O3-K2O/Na2O, La-Th-Sc, Th-Sc-Zr/10, K2O-Rb, Th/Sc-Zr/Sc and 15*Al2O3-Zr-300*TiO2 diagrams suggest deposition in active continental margin setting, under humid climatic conditions. Furthermore, all data imply poor sorting and rapid deposition of the sediments without important recycling processes.
conference
https://www.sgem.org/index.php/jresearch-article?citekey=KORALAY20191211220
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19th International Multidisciplinary Scientific GeoConference SGEM 2019
19th International Multidisciplinary Scientific GeoConference SGEM 2019, 30 June - 6 July, 2019
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
211-220
30 June - 6 July, 2019
website
cdrom
4798
Carbonaceous rocks; Mafic-Ultramafic source rock; Recycling process; Paleo-climate