Mineralogical Characteristics, Fluid Inclusions, C-O Isotope Geochemistry, and Rb-Sr Isotope Systematics of Listvenites Related to the Eastern Taurus Ophiolites, Malatya, Türkiye
MINERALS, cilt.16, sa.10, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 16 Sayı: 10
- Basım Tarihi: 2026
- Doi Numarası: 10.3390/min16101015
- Dergi Adı: MINERALS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, ABI/INFORM, Geobase, INSPEC, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Earth, Atmospheric, & Aquatic Science Collection (ProQuest), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
This study integrates mineralogy, fluid-inclusion microthermometry, C-O isotope geochemistry, and Rb-Sr isotope systematics to constrain fluid-rock interaction in the Hekimhan and Kuluncak listvenites. The assemblages are dominated by dolomite, calcite, and quartz and commonly contain cerussite, tetrahedrite, galena, anglesite, pyrite, and chalcopyrite. Fluid inclusions homogenize at 285-417 degrees C and have salinities of 6.16-13.40 wt.% NaCl eq.; eutectic temperatures of -22.5 to -39.5 degrees C are consistent with fluids related to the H2O-NaCl-FeCl2 system. Carbonate delta 13C VPDB values range from -4.54 to +4.31 parts per thousand and laboratory-reported delta 18OVSMOW values from 22.15 parts per thousand to 31.95 parts per thousand; calculated delta 18OH2OVSMOW values range from +9.55 parts per thousand to +18.16 parts per thousand, indicating heterogeneous fluid-rock interaction. Measured 87Sr/86Sr ratios range from 0.708696 to 0.711060 and 87Rb/86Sr from 0.011 to 3.534. The carbonate Rb-Sr regression yields 42 +/- 17 Ma, with an initial 87Sr/86Sr ratio of 0.70871 +/- 0.00046 and MSWD = 2.4. The 42 Ma central value falls within the Middle Eocene and is compatible with a Middle Eocene hydrothermal carbonation event, although the relatively large uncertainty and four-sample dataset warrant cautious interpretation. Trace-element enrichments in As-Cu-Ni-Pb-Sb, Pb-Cd, and Cu-Sr-Ba indicate localized metal redistribution. The integrated dataset supports structurally focused, multistage carbonation-silicification followed by metal-bearing hydrothermal overprinting under evolving physicochemical conditions.