In-situ LA-ICP-MS U[sbnd]Pb dating and geochemistry of garnet skarn occurrences related to South Yenice plutons, NW Türkiye

Geochemistry Pub Date : 2024-08-06 DOI:10.1016/j.chemer.2024.126169

Namık Aysal, Nurullah Hanilçi, Sinan Öngen, Cem Kasapçı, Fatma Şişman Tükel, Marcel Guillong, Mayuko Fukuyama, Nicole Leonard, Elif Varol

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Abstract

On the Biga Peninsula (NW Türkiye) Oligo-Miocene felsic plutonic intrusions extend vast regions. Skarn zones have developed around South Yenice plutons in this zone, which Show a rich potential for contact metamorphic diversity and mineralization, depending the host rock variety. Contact metamorphic zones and skarn occurrences have been mapped and determined. UPb dating was performed on garnets, and ages of 25.26 ± 0.30 Ma and 26.01 ± 1.02 Ma were yielded from Islıkçatıdere, and 24.85 ± 1.68 Ma, 25.81 ± 3.97 Ma and 21.03 ± 0.38 Ma from Namazgah skarn zones, respectively. UPb zircon dating of the Hıdırlar, Kurtlar and Namazgah plutons yielded ages of 26.33 ± 0.3, 25.39 ± 055 and 24.79 ± 0.38 Ma. These ages prove that the ages obtained from the skarn zone and the parent plutons are compatible. Garnet mineral chemistry and trace element analyses, when evaluated together with limited fluid inclusion data, indicate that the study area may be important in terms of potential iron, copper, lead and zinc mineralization.

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原位 LA-ICP-MS U[sbnd]Pb 定年和图尔基耶西北部与南耶尼策岩浆岩有关的石榴石矽卡岩矿点的地球化学研究

在比加半岛（图尔基耶西北部），新中新世的长岩侵入体延伸了广阔的区域。矽卡岩带围绕着该地区的南耶尼采（South Yenice）岩柱而形成，显示出丰富的接触变质多样性和成矿潜力，这取决于寄主岩的种类。已经绘制并确定了接触变质带和矽卡岩矿点。对石榴石进行了 UPb 测定，Islıkçatıdere 的年龄分别为 25.26 ± 0.30 Ma 和 26.01 ± 1.02 Ma，Namazgah矽卡岩区的年龄分别为 24.85 ± 1.68 Ma、25.81 ± 3.97 Ma 和 21.03 ± 0.38 Ma。对Hıdırlar、Kurtlar和Namazgah岩浆岩进行的UPb锆石年代测定得出的年龄分别为26.33 ± 0.3 Ma、25.39 ± 055 Ma和24.79 ± 0.38 Ma。这些年龄证明，从矽卡岩区和母岩岩体获得的年龄是一致的。石榴石矿物化学和微量元素分析，以及有限的流体包裹体数据，表明该研究区域可能具有重要的铁、铜、铅和锌矿化潜力。

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Geochemistry

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