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Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni

Yıl 2022, Cilt: 65 Sayı: 1, 1 - 34, 30.09.2021
https://doi.org/10.25288/tjb.975220

Öz

Türkiye’de Neotetis Okyanusu’nun kuzey kolunun kalıntısı olan İzmir-Ankara-Erzincan kenet zonunun (İAESZ) ofiyolitik melanj kompleksleri birçok manganez oksit yataklarına ev sahipliği yapmaktadır. Bu yataklar, melanj ünitelerine ait olan kırmızı-menekşe renkli radyolaryalı çört blokları içerisinde gözlenmektedir. Bu melanj birliklerinden, Artova melanjı Kırşehir Masifi (Orta Türkiye)’nin kuzey kesiminde İAESZ boyunca yayılım sunmaktadır ve aynı zamanda altere serpantinit ve radyolaryalı çört blokları, yastık lav, pelajik kireçtaşı bloklarından meydana gelmektedir. Cihanpaşa (Yozgat, İç Anadolu) bölgesinden Mn-oksit cevherleşmeleri, bu oluşumların kökeni, paleoredoks özellikleri ve depolanma ortamlarını ortaya koymak için analiz edilmiştir. Cevherleşmelerinin mineral parajenezi yaygın olarak braunit, pirolusit, psilomelan ve kuvars minerallerinden oluşmaktadır. Jeokimyasal olarak, yüksek Mn/Fe (60,2), düşük ΣNYE (15,75 ppm), Cu+Ni+Co (730 ppm), negatif Ce anomalisi ve hafif negatif Y/Y* anomalisi (0,87) Cihanpaşa manganez cevherleşmelerinin denizaltı bir hidrotermal sistem ile oluştuğunu ortaya koymaktadır. Negatif Ce/Ce* anomalisi (0,33), düşük Ceanom değerleri (< − 0,54), redoks göstergeler [V/(V + Ni) = 0,43; Ni/Co = 0,51, V/Mo = 6,15)] çalışılan manganez cevherleşmelerinin hidrotermal sistem tarafından oksijenli bir sedimanter ortamda oluştuğuna işaret etmektedir. Dahası, hafif pozitif ve negatif Eu anomalisi (0,84), yüksek Lasn/Cesn (3,96), düşük Al/(Al + Fe) (0,34) ve ΣNYE/Fe (30,7x10-4) oranları Cihanpaşa manganez oksit cevherleşmelerinin Neotetis Okyanusu’nun yaklaşık yayılma sırtına nispeten yakın düşük sıcaklıklı hidrotermal sistemin etkisi ile şekillenmiş olduğunu göstermektedir.

Kaynakça

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Origin and Geochemical Signatures of Manganese Mineralizations in Southern Part of the Cihanpaşa (Yozgat) Region

Yıl 2022, Cilt: 65 Sayı: 1, 1 - 34, 30.09.2021
https://doi.org/10.25288/tjb.975220

Öz

Late Cretaceous ophiolitic mélange complexes of the Izmir-Ankara-Erzincan Suture Zone (İAESZ) that is the remnant of the northern branch of the Neotethys Ocean host numerous manganese oxide deposits in Turkey. These deposits are observed within the red-violet radiolarian chert blocks belonging to mélange units. Of these mélange units, the Artova mélange is observed along the İAESZ in the northern part of the Kırşehir Massif, central Turkey, and is made up mainly of pelagic limestone, pillow basalt, radiolarian-chert blocks, and highly altered serpentinite. Mn-oxide mineralizations from Cihanpaşa (Yozgat, central Anatolia) region were analysed in order to determine their depositional conditions, paleo-redox signatures, origin and source. These mineralizations are composed mainly of an alternation of radiolarian cherts and mudstones that overlie altered pillow basalt in an overturned fold. Based on petrographic studies, the mineral paragenesis of the manganese oxide mineralizations is comprised predominantly of braunite, pyrolusite, pysilomelane and quartz. Geochemically, high Mn/Fe (60.2), low ΣREE (15.75 ppm) and Cu+Ni+Co (730 ppm), and a negative Ce anomaly and weakly negative Y/Y* anomaly (0.87) suggest that the Cihanpaşa manganese mineralizations formed in a submarine hydrothermal system. A negative Ce/Ce* anomaly (0.33), low Ceanom values (< − 0.54), and redox-sensitive tracers [V/(V + Ni) = 0.43, Ni/Co = 0.51, V/Mo = 6.15)] indicate that the manganese mineralization was formed by a hydrothermal system in an oxygenated marine sedimentary environment. Further, a weakly positive and negative Eu anomaly (0.84), high Lasn/Cesn (3.96), low Al/(Al + Fe) (0.34) and ΣREE/Fe (30.7x10-4) ratios highlighted that the Cihanpaşa manganese mineralizations were formed via impact of a low-T hydrothermal system, which is relatively close to the spreading ridge of the Izmir-Ankara-Erzincan Ocean.

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Selman Aydoğan 0000-0003-2478-8632

Yayımlanma Tarihi 30 Eylül 2021
Gönderilme Tarihi 30 Temmuz 2021
Kabul Tarihi 1 Eylül 2021
Yayımlandığı Sayı Yıl 2022 Cilt: 65 Sayı: 1

Kaynak Göster

APA Aydoğan, S. (2022). Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni. Türkiye Jeoloji Bülteni, 65(1), 1-34. https://doi.org/10.25288/tjb.975220
AMA Aydoğan S. Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni. Türkiye Jeol. Bült. Ocak 2022;65(1):1-34. doi:10.25288/tjb.975220
Chicago Aydoğan, Selman. “Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri Ve Kökeni”. Türkiye Jeoloji Bülteni 65, sy. 1 (Ocak 2022): 1-34. https://doi.org/10.25288/tjb.975220.
EndNote Aydoğan S (01 Ocak 2022) Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni. Türkiye Jeoloji Bülteni 65 1 1–34.
IEEE S. Aydoğan, “Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni”, Türkiye Jeol. Bült., c. 65, sy. 1, ss. 1–34, 2022, doi: 10.25288/tjb.975220.
ISNAD Aydoğan, Selman. “Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri Ve Kökeni”. Türkiye Jeoloji Bülteni 65/1 (Ocak 2022), 1-34. https://doi.org/10.25288/tjb.975220.
JAMA Aydoğan S. Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni. Türkiye Jeol. Bült. 2022;65:1–34.
MLA Aydoğan, Selman. “Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri Ve Kökeni”. Türkiye Jeoloji Bülteni, c. 65, sy. 1, 2022, ss. 1-34, doi:10.25288/tjb.975220.
Vancouver Aydoğan S. Cihanpaşa (Yozgat) Bölgesinin Güney Kesimindeki Manganez Cevherleşmesinin Jeokimyasal Özellikleri ve Kökeni. Türkiye Jeol. Bült. 2022;65(1):1-34.

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