Eclogite and blueschist facies rocks occurring as a tectonic unit between the underlying Menderes Massif and the overlying Afyon Zone / Lycian Nappes and the Bornova Flysch Zone in western Anatolia represent the eastward continuation of the Cycladic Blueschist Unit in Turkey. This high-P unit is attributed to the closure of the Pindos Ocean and consists of (i) a Triassic to Upper Cretaceous coherent series derived from passive continental margin sediments and (ii) the tectonically overlying Upper Cretaceous Selcuk melange with eclogite blocks embedded in a pelitic epidote-blueschist matrix. The coherent series has experienced epidote-blueschist facies metamorphism (490 ± 25°C / 11.5 ± 1.5 kbar; 38 km depth). 40 Ar/ 39 Ar white mica and 206 Pb/ 238 U monazite dating of quartz metaconglomerate from coherent series yielded middle Eocene ages of 44 ± 0.3 and 40.1 ± 3.1 Ma for epidote-blueschist facies metamorphism, respectively. The epidote-blueschist facies metamorphism of the matrix of the Selcuk melange culminates at 520 ± 15°C / 13 ± 1.5 kbar, 43 km depth, and is dated 57.5 ± 0.3-54.5 ± 0.1 Ma (40 Ar/ 39 Ar phengite). Eclogite facies metamorphism of the blocks (570 ± 30°C / 18 ± 2 kbar, 60 km depth) is early Eocene and dated at 56.2 ± 1.5 Ma by 206 Pb/ 238 U zircon. Eclogites experienced a nearly isothermal retrogression (490 ± 40°C / ~ 6-7 kbar) during their incorporation into the Selcuk melange. The retrograde overprints of the coherent series (410 ± 15°C / 7 ± 1.5 kbar from Dilek Peninsula and 485 ± 33°C / ~ 6-7 kbar from Selcuk-Tire area) and the Selcuk melange (510 ± 15°C / 6 ± 1 kbar) are dated at 35.8 ± 0.5-34.3 ± 0.1 Ma by 40 Ar/ 39 Ar white mica and 31.6 ± 6.6 Ma by 206 Pb/ 238 U allanite dating methods, respectively. Regional geological constrains reveal that the contact between the Menderes Massif and the Cycladic Blueschist Unit originally formed a lithosphere-scale transform fault zone. 40 Ar/ 39 Ar white mica age from the contact indicates that the Cycladic Blueschist Unit and the Menderes Massif were tectonically juxtaposed under greenschist facies conditions during late Eocene, 35.1 ± 0.3 Ma.

中文翻译：

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西安纳托利亚/土耳其基克拉迪蓝片岩单元的 P-T-t 演化：对爱琴海地区的地球动力学影响

榴辉岩和蓝片岩相岩石作为下伏 Menderes 地块和上覆 Afyon 带 / Lycian Nappes 和安纳托利亚西部的 Bornova Flysch 带之间的构造单元出现，代表了土耳其基克拉迪蓝片岩单元的向东延续。该高压单元归因于 Pindos 洋的闭合，包括 (i) 源自被动大陆边缘沉积物的三叠纪至上白垩统连贯系列和 (ii) 构造上覆的上白垩统 Selcuk 混杂岩，榴辉岩块嵌入泥质绿帘石-蓝片岩矩阵。连贯系列经历了绿帘石-蓝片岩相变质作用（490 ± 25°C / 11.5 ± 1.5 kbar；38 km 深度）。相干系列石英变砾岩的 40 Ar/ 39 Ar 白云母和 206 Pb/ 238 U 独居石定年分别为绿帘石-蓝片岩相变质作用产生中始新世年龄分别为 44 ± 0.3 和 40.1 ± 3.1 Ma。Selcuk 混杂岩基质的绿帘石-蓝片岩相变质作用在 520 ± 15°C / 13 ± 1.5 kbar、43 公里深度达到顶点，测年为 57.5 ± 0.3-54.5 ± 0.1 Ma（40 Ar/ 39 Ar phengite）。块状榴辉岩相变质作用（570 ± 30°C / 18 ± 2 kbar，60 km 深度）是早始新世，年龄为 56.2 ± 1.5 Ma，由 206 Pb/ 238 U 锆石测得。榴辉岩在融入 Selcuk 混杂岩的过程中经历了近乎等温的退化 (490 ± 40°C / ~ 6-7 kbar)。相干系列逆行套印 (410 ± 15°C / 7 ± 1. 5 kbar 来自 Dilek 半岛和 485 ± 33°C / ~ 6-7 kbar 来自 Selcuk-Tire 地区）和 Selcuk 混合物（510 ± 15°C / 6 ± 1 kbar）的日期为 35.8 ± 0.5-34.3 ± 0.1 Ma分别采用 40 Ar/ 39 Ar 白云母和 31.6 ± 6.6 Ma，分别采用 206 Pb/ 238 U 铝榴石测年方法。区域地质约束表明，Menderes 地块与基克拉迪蓝片岩单元的接触最初形成了岩石圈尺度的转换断裂带。来自接触面的 40 Ar/ 39 Ar 白云母年龄表明，基克拉迪蓝片岩单元和 Menderes 地块在始新世晚期（35.1 ± 0.3 Ma）的绿片岩相条件下构造并置。区域地质约束表明，Menderes 地块与基克拉迪蓝片岩单元的接触最初形成了岩石圈尺度的转换断裂带。来自接触面的 40 Ar/ 39 Ar 白云母年龄表明，基克拉迪蓝片岩单元和 Menderes 地块在始新世晚期（35.1 ± 0.3 Ma）的绿片岩相条件下构造并置。区域地质约束表明，Menderes 地块与基克拉迪蓝片岩单元的接触最初形成了岩石圈尺度的转换断裂带。来自接触面的 40 Ar/ 39 Ar 白云母年龄表明，基克拉迪蓝片岩单元和 Menderes 地块在始新世晚期（35.1 ± 0.3 Ma）的绿片岩相条件下构造并置。