Peritectic assemblage entrainment and mafic-felsic magma interaction in the Late Oligocene-Early Miocene Karadag Pluton in the Biga Peninsula, northwest Turkey: petrogenesis and geodynamic implications
The pluton had a high-K calc-alkaline affinity and exhibited a metaluminous to peraluminous (aluminum saturation index of
📌 3 Key Takeaways
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Objective & Hypothesis:The Hellenic subduction system governs the entire Aegean region through the creation of a migrating magmatic arc that has existed since the beginning of the Early Cenozoic.
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Key Findings & Data:It consists of 2 major lithological units, based on their petrographic and geochemical features, comprising: 1) main plutonic facies (SiO2 70 wt.%) that are represented by cordierite-free and cordierite-bearing leucogranites.
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Conclusion & Impact:The pluton had a high-K calc-alkaline affinity and exhibited a metaluminous to peraluminous (aluminum saturation index of
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Peritectic entrainment assemblage · magma mixing · U/Pb and K-Ar dating
Abstract
The Hellenic subduction system governs the entire Aegean region through the creation of a migrating magmatic arc that has existed since the beginning of the Early Cenozoic. The Karadag Pluton is situated in the NW part of Turkey and represents one of the distinct snapshots of this subduction system during the Late Oligocene-Early Miocene Period.iod. It consists of 2 major lithological units, based on their petrographic and geochemical features, comprising: 1) main plutonic facies (SiO2 70 wt.%) that are represented by cordierite-free and cordierite-bearing leucogranites. Zircon U-Pb laser ablation inductively-coupled plasma mass spectrometry and K-Ar dating revealed crystallization and cooling ages of 23.9 +/- 0.5 Ma and 20.2 +/- 0.9 Ma for the main plutonic bodies, and 22.0 +/- 1.1 Ma for the leucogranite facies, respectively. The pluton had a high-K calc-alkaline affinity and exhibited a metaluminous to peraluminous (aluminum saturation index of
AYSAL, N., ONGEN, A. S., SAHİN, S. Y., KASAPCİ, C., HANİLCİ, N., PEYTCHEVA, I. (2021). Peritectic assemblage entrainment and mafic-felsic magma interaction in the Late Oligocene-Early Miocene Karadag Pluton in the Biga Peninsula, northwest Turkey: petrogenesis and geodynamic implications. Turkish Journal of Earth Sciences, Cilt: 30 - Sayı: 2, 279–312. https://ajindex.com/articles/189278
Altherr R, 2002, CONTRIB MINERAL PETR, V143, P397, DOI 10.1007/s00410-002-0352-y Altherr R, 2000,
LITHOS, V50, P51, DOI 10.1016/S0024-4937(99)00052-3 Altinli IE, 1973, C EARTH SCI OCC 50 A, P105 Altunkaynak S, 2012,
LITHOS, V155, P289, DOI 10.1016/j.lithos.2012.09.008 Annen C, 2006, J PETROL, V47, P505, DOI 10.1093/petrology/egi084 Ayrton SN, 1991, ENCLAVES GRANITE PET, V13, P465 Aysal N, 2020,
GEOCHEMISTRY, DOI [10.1016/j.chemer.2020.125676, DOI 10.1016/J.CHEMER.2020.125676] Aysal N, 2018, GEOL SOC SPEC PUBL, V464, P131, DOI 10.1144/SP464.4 Aysal N, 2015, J ASIAN EARTH SCI, V105, P68, DOI 10.1016/j.jseaes.2015.03.026 Aysal N, 2012, J ASIAN EARTH SCI, V45, P201, DOI 10.1016/j.jseaes.2011.10.011 Bartoli O, 2016, AM MINERAL, V101, P1543, DOI 10.2138/am-2016-5541CCBYNCND Baxter S, 2002, MINER PETROL, V76, P63, DOI 10.1007/s007100200032 Black KN, 2013,
LITHOS, V180, P92, DOI 10.1016/j.lithos.2013.09.001 BLEVIN PL, 1992, T ROY SOC EDIN-EARTH, V83, P305, DOI 10.1017/S0263593300007987 Castro A, 2013, EARTH-SCI REV, V124, P68, DOI 10.1016/j.earscirev.2013.05.006 Claeson DT, 2004, CONTRIB MINERAL PETR, V147, P288, DOI 10.1007/s00410-003-0536-0 CLARKE DB, 1995, MINERAL MAG, V59, P311, DOI 10.1180/minmag.1995.059.395.15 Clemens JD, 2020, AUST J EARTH SCI, V67, P509, DOI 10.1080/08120099.2020.1701076 Clemens JD, 2012,
LITHOS, V134, P317, DOI 10.1016/j.lithos.2012.01.001 Clemens J.D., 2009, T R SOC EDIN EARTH E, V100, P159, DOI DOI 10.1017/S1755691009016053 Clemens JD, 2006, EVOLUTION DIFFERENTI, P296, DOI DOI 10.2277/0521782376 DEBON F, 1988, B MINERAL, V111, P493, DOI 10.3406/bulmi.1988.8096 Debon F., 1983, EARTH ENV SCI T R SO, V73, P135, DOI DOI 10.1017/S0263593300010117 Delaloye M, 2000, INT GEOL REV, V42, P241, DOI 10.1080/00206810009465081 DIAS G, 1994,
LITHOS, V32, P207, DOI 10.1016/0024-4937(94)90040-X Douce AEP, 1999, GEOL SOC SPEC PUBL, V168, P55, DOI 10.1144/GSL.SP.1999.168.01.05 Erdmann S, 2010, J VOLCANOL GEOTH RES, V198, P355, DOI 10.1016/j.jvolgeores.2010.10.002 Ersoy EY, 2017,
LITHOS, V288, P55, DOI [10.1016/j.lithos.2017.07.006, 10.1016/j.lithos2017.07.006] Ersoy EY, 2013,
LITHOS, V180, P5, DOI 10.1016/j.lithos.2013.06.007 Farina F, 2012,
LITHOS, V153, P243, DOI 10.1016/j.lithos.2012.05.011 Forster M.D, 1960, UNITED STATES GEOLOG, V354, P11 Giret A, 1980, CAN MINERAL, V18, P481. Gorton MP, 2000, CAN MINERAL, V38, P1065, DOI 10.2113/gscanmin.38.5.1065 HARRIS NBW, 1994, CONTRIB MINERAL PETR, V117, P241, DOI 10.1007/BF00310866 HAWKESWORTH CJ, 1991, PHIL