P–T evolution of the Cyclades Blueschist Unit: Constraints on the evolution of a nascent subduction system from Zr-in-rutile (ZiR) and quartz-in-garnet (QuiG) thermobarometry

This dataset contains the results of Zr-in-rutile thermometry (ZiR) and quartz-inclusion-in-garnet barometry (QuiG) on a suite of blueschist and eclogite samples from the Cyclades Blueschist Unit (CBU) on the island of Syros, Greece. Crystals of rutile and quartz located as inclusions within garnet were analyzed with the goal of constraining the minimum pressure and temperature conditions of garnet formation. The pressure and temperature constraints on garnet formation were then used to infer the pressure and temperature trajectory of the subduction geotherm during metamorphism of the Cyclades Blueschist Unit.本数据集收录了希腊锡罗斯岛（Syros）基克拉迪蓝片岩单元（Cyclades Blueschist Unit, CBU）的一套蓝片岩与榴辉岩样品的测试结果，测试采用了金红石锆温计（Zr-in-rutile thermometry）与石榴石内石英包裹体压力计（quartz-inclusion-in-garnet barometry）两种方法。本次分析以赋存于石榴子石内部的金红石与石英包裹体晶体为研究对象，旨在限定石榴子石形成时的最低温压条件。随后，基于石榴子石形成的温压约束条件，推演了基克拉迪蓝片岩单元变质作用过程中俯冲地热曲线的温压演化轨迹。