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Discovery of Middle Permian volcanism in the Antalya Nappes, southern Turkey: tectonic significance and global meaning

机译:在土耳其南部安塔利亚纳普斯发现中二叠纪火山活动:构造意义和全球意义

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Detailed stratigraphic studies on the Middle-Upper Permian rocks of the Tahtal?da? nappe (Antalya Nappes), largely exposed along the Güzelsu Corridor in central Taurides, have revealed the presence of basaltic volcanic rocks intercalated within the shallow-marine fossiliferous carbonate successions. Vitrophyric basaltic extrusions producing distinct pillows in the K?z?lba? Formation severely dolomitized the associated carbonate rocks.The coeval ?ukurk?y Formation, devoid of volcanic layers, is also exposed in the same corridor and was probably representing a part of the carbonate platform bordering this volcanic activity. The Middle-Upper Permian successions of the K?z?lba? and ?ukurk?y Formations have been calibrated based on a foraminiferal zonation and a Capitanian age has been assigned to the basaltic interval. Basalts are also chronostratigraphically located just below a horizon interpreted as the mid-Capitanian mass extinction event. Based on these data, two fundamental conclusions can be driven from this study. The discovery of basaltic volcanism brings a strong evidence for a much longer history about the rift-associated volcanic events in the Antalya Nappes. The Capitanian volcanic rocks are contemporaneous with the Emeishan Large Igneous Province in South China which is linked to the mid-Capitanian mass extinction event.
机译:Tahtal?da?中上二叠统岩石的详细地层学研究纳普斯(安塔利亚纳普斯)(主要是在陶里德中部的古泽尔苏走廊(GüzelsuCorridor)上露面)表明,浅海化石碳酸盐岩层序中插有玄武质火山岩。玻璃体玄武质挤压在K?z?lba?中产生不同的枕头地层严重白云石化了伴生的碳酸盐岩。没有火山层的同时期“库尔库伊”地层也暴露在同一条走廊中,可能代表了与火山活动接壤的碳酸盐台地的一部分。 K?z?lba?的中上二叠统演替已根据有孔虫带标定了“福库尔”和“福库克”地层,并为该玄武岩层段分配了卡皮塔尼亚年龄。玄武岩在时间地层上也位于地平线以下,这被解释为卡皮塔尼中期灭绝事件。基于这些数据,可以从这项研究得出两个基本结论。玄武质火山作用的发现为有关安塔利亚纳普斯裂谷相关火山事件的悠久历史提供了有力证据。 Capitanian火山岩与中国南方的峨眉山大火成岩省同时期,这与中卡皮塔尼亚大灭绝事件有关。

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