Geochemical features of the Menteşe Formation dolostones (Rhaetian) in the Karacahisar-Kasımlar area (Isparta-Turkey)
Yükleniyor...
Tarih
2018-08
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SpringerLink
Erişim Hakkı
info:eu-repo/semantics/restrictedAccess
Attribution-NonCommercial-ShareAlike 3.0 United States
Attribution-NonCommercial-ShareAlike 3.0 United States
Özet
The purpose of this study is to determine the geochemical characteristics of the Menteşe dolostones (Rhaetian) in the west Taurus
Mountains, Turkey. The isotope characteristics of the Menteşe dolostones show a variation in the δ18O values of the dolomites
between + 1.35 and − 2.72‰ (VPDB) and a variation in the δ13C values of the dolomites between + 1.6 and + 3.33‰ (VPDB).
Most of the Menteşe dolostone samples have positive oxygen isotope values; others have weak negative isotope values, which
indicate early diagenetic development. In addition, oxygen, carbon, and strontium isotopes and trace element analyses suggest
that these dolostones were probably resulted from insignificant recrystallizaion process than chemically similar fluids.
Furthermore, Mn/Sr values of the Menteşe dolostones indicate that there is no significant diagenetic alteration. The total REE
contents of the Menteşe Formation dolostones display a strong positive correlation with Si, Al, Fe, K, Ti, Ba, Rb and negative
correlation with Mg, hence REE content is associated with in the first degree titanium-bearing minerals (probably sphene, rutile,
anatase), second degree phosphate (apatite), and barium and rubidium-bearing minerals (probably barite). Ce anomalies versus
Nd concentrations of the Menteşe dolostone samples indicate that these dolostones are formed in an anoxic environment. In
addition, the K/Rb ratios of the Menteşe dolostones are not exposed to any metamorphism and indicate some diagenetic
alteration. Calculated temperature values using δ18O values of the Menteşe dolostones yield precipitation temperatures of 17
to 42 °C, and suggest burial depths of 67 to 900 m. Sources of magnesium for dolomitization of the Menteşe Formation
carbonates were most likely fluids from seawater and/or diagenetic brines (slightly modified seawater). The Menteşe dolostones
formed as early diagenetic (Rhaetian to Cenomanian) in shallow burial areas at lower temperatures than seawater and/or
diagenetic brines (slightly modified seawater).
Açıklama
Anahtar Kelimeler
Shallow Burial, Isotope, Sea Water, Low Temperature, West Taurides
Kaynak
WoS Q Değeri
Q4
Scopus Q Değeri
N/A
Cilt
11
Sayı
16
Künye
Dinç, S., Özkan, A.M. (2018). Geochemical features of the Menteşe Formation dolostones (Rhaetian) in the Karacahisar-Kasımlar area (Isparta-Turkey). Arabian Journal of Geosciences, 11 (16). DOI:https://dx.doi.org/10.1007/s12517-018-3802-1
