Petrology of the Maksyutov Eclogite Blueschist Complex, Southern Urals

• 来源期刊: 大陆动力学（英文版）
• 学科: 地球科学
• 关键词: eclogite blueschist Maksyutov complex Asia
• 年，卷（期）: 2001,（2）
• 页码范围: 9-16
• 页数: 8页
• 分类号: P5
• 语种: 英文

摘要

The Maksyutov complex is a part of Precambrian folded belt extending from Urals, North Karakum, Kunlun, Qilian, Qinling to the Dabie-Sulu belt of eastern China. In Maksyutov the eclogites present as individual blocks and boudines embedded within the glaucophane and micaceous schists. Due to the Phanerozoic multi-phase granite intrusions and their resulting superposed metamorphism the data on the age of eclogite are diverse spanning from Early Proterozoic to lower Paleozoic. The mineral compositions of the eclogite are constant with garnet, omphacite and rutile; however, they are often replaced by metamorphic assemblages of epidote-blueschist facies. The garnets are iron rich with f=50-75% (f = Fe2+/(Mg + Fe2+)). Clinopyroxenes are omphacites with Jd 40.3-52.2. According to the garnet clinopyroxene geothermometry and Jadeite + quartz→albite geobarometry T=1060-686 °C, P=2.23-1.416GPa are estimated. The PT trajectory of Maksyutov eclogite corresponds to the upward intrusion of eclogite magma, the final consolidation of the eclogites probably took place in the lower crust.