Possible geo-environmental influences and the chemical content variation model of limestone within an ultrabasic complex


Nyamsari D. G., YALÇIN M. G.

ARABIAN JOURNAL OF GEOSCIENCES, cilt.15, sa.6, 2022 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 6
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1007/s12517-022-09723-x
  • Dergi Adı: ARABIAN JOURNAL OF GEOSCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), Geobase, INSPEC
  • Anahtar Kelimeler: Environmental influence, Heavy metals, Lithological impact, Diagenetic impact, Ultrabasic complex, HEAVY-METAL SOURCES, SEDIMENTS, GEOCHEMISTRY
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The SW segment of the Antalya complex is a geologically interesting area composed of different rock types with distinctive and non-distinctive boundaries between formations. The rock types were observed juxtaposed in some areas of the complex. The rocks that characterize the area include shale, sandstone, microconglomerate, siltstone, claystone, chert, limestone, basalts, spilite and ophiolite dominated by serpentines. This work focuses on modelling the variation of the chemical content of soil on the limestone within the complex and the possible geo-environmental influences on the content. Twenty-six soil samples on limestone collated from different formations within the complex revealed very high CaO (48.8-95.4) percentages and high SiO2 in some sample (up to 47.5%). Micrites matrix and sparites filling veins showed that the limestones and soils were subjected to syn- and post-diagenetic activities. Repeated dissolution and recrystallization formed vein-filled sparites that may have contributed to intense depletion of authigenic minerals like albitized feldspar. Average trace metal content (ppm) of soils included Zr (5948.08), Sr (295.37), Co (83.68), Cr (71.99), Cu (57.95), Sn (54.84), Ni (40.21), Zn (36.73), Re (18.71), V (11.58) and Pb (7.60). EF plots for Fe/Mn Fe/Zn and Fe/Cu revealed paleo-redox conditions of an oxic-marginal trend for deposition in an oxic environment close to a plate margin, which may have led to the poor fossil preservations. The Sr-Mn relationship showed meteoric diagenesis occurrence. Two major lithological influences on the limestone composition were distinguished. The southwest to north-northwest trend for primary limestone composition, and northeast to south trend for elements, resulting from other environmental influences.