 | Hunziker, D., Burg, J.-P., Moulas, E., Reusser, E., Omrani, J. (2017) Formation and preservation of fresh lawsonite: Geothermobarometry of the North Makran Blueschists, southeast Iran. Journal of Metamorphic Geology, 35 (8) 871-895 doi:10.1111/jmg.12259 | Journal (article/letter/editorial) | | Cretaceous closure of the Tethys Ocean. The largest blueschist outcrop is a >1000 m thick coherent unit with...interlayered metabasalts and metavolcanoclastic rocks. Blueschist metamorphism is only incipient in coarse grained...metamorphic recrystallization. The low variance blueschist peak assemblage is glaucophane, lawsonite, titanite...and rutile assemblages before entering into the blueschist facies and finally following a retrograde path...metamorphism; counterclockwise P-T path 1. INTRODUCTION Blueschist-facies rocks are markers of fossil subduction |  | | Journal (article/letter/editorial) | | creating the abnormal conditions required for blueschist generation was still missing. This mechanism...problems in this region than in the Circum-Pacific blueschist complexes, where the dynamic, steady-state plate...precollisional paleogeographic setting do the blueschist protoliths represent: oceanic crust, continental...Alpine-Himalayan blueschist complexes in the frame work of the above questions. BLUESCHIST FACIES The blueschist...blueschist facies is characterized by a unique series of dense minerals comprising sodic amphibole, lawsonite |  | | Journal (article/letter/editorial) | | Twenty-four samples (in the form of greenschist and blueschist polished stone tools from Hungarian Neolithic...collections and also greenschists and blueschist from outcrops) were investigated. The aim of this work...to our results, it is possible to distinguish blueschist from macroscopically similar greenschist polished...determined; it requires the study of samples from more outcrops. The investigation of ancient stone tools is only...geochemical research areas. Key-words: greenschist, blueschist, polished stone tools, non-destructive analysis |  | | Journal (article/letter/editorial) | | Abstract. The compositions of sodic pyroxenes from blueschist metabasites in Northwest Turkey were investigated...compared with sodic pyroxenes from high-grade blueschist terrains and eclogites with special reference...down to 30%. Epidote-garnet bearing high-grade blueschist metabasites of Syros on the other hand contain...metabasites and metacherts. The eastern part of the blueschist belt in the region of Mihallicik was studied...distinguished three metamorphic zones - lawsonite - albite, lawsonite - crossite, epidote - crossite - with |  | | Journal (article/letter/editorial) | | metapelites and metagreywackes in western Tianshan, China: metamorphic evolution and tectonic implications...of Earth and Space Sciences, Peking University, China (lfzhang@pku.edu.cn) 2 Institute of Mineralogy and...metamorphic belt of western Tianshan in northwestern China is a rarely preserved oceanic UHP terrane which...Habutengsu Valley and adjacent area within this belt contain quartz, albite, garnet, white mica, chlorite...jadeite and glaucophane. In the northern Habutengsu area, garnet is compositionally characterized by similar |  | | Journal (issue) | | strong dispersion. Benitoite occurs in altered blueschist within serpentinite. The gem crystals formed...within fractures as a result of the alteration of blueschist by hydrothermal fluids derived from the regional... benitoite is found exclusively in bodies of blueschist within serpentinite. During 1995, the senior...senior author conducted a detailed study of blueschist bodies throughout the New Idria district on behalf of...crystals were detected for the first time in a blueschist body on Santa Rita Peak. After nearly a decade |  | | Journal (article/letter/editorial) | | in the eastern part of the Northwest Turkish blueschist belt in the region of Mihalli~ik, and distinguished...in grade northwards. He also obtained ages for blueschist metamorphism of 60-80 M a (@o~ulu and K r u m...m menacher 1967). Ltinel (1967) studied a small area of glaucophane-lawsonite facies blueschists south...isolated small blueschist outcrops south of Tavsanh. Geology Throughout the NW Turkish blueschist/ultramafic...blueschist/ultramafic belt the outcrops are separated by an extensive Neogene cover. A large area (20 to 45 kin) of blueschists |  | | Journal (article/letter/editorial) | | along the northern part of the CIM in the Sabzevar area. The geology and field relation of Sabzevar ophiolite...related to Neotethys basin remnants, while scarce outcrops of ophiolites and high pressure rocks along the...andesite, metabasite and serpentinite (Fig. 2). Small outcrops Fig. 1 (a) Ophiolite distribution of Iran; (b)...zone Fig. 2 Simplified geological map of the study area, after Majidi (1999) with little modification of...and metamorphic rocks (mafic amphibolite) in this area. We have used the whole rock and mineral chemistry |  | | Report (chapter) | | the Saih Hatat area, shown in Fig. 2. Arrows point to the locations of some of the outcrops of the metamorphic...Muscot % ii" Fig. 2. Geologic map of the Saih Hatat area (simplified from Le Metour et al. (1986). Solid...less (Searle & Malpas 1980; Spray 1984). In many outcrops, the sole rocks have been completely detached...overlying ophiolite (Boudier et al. 1985). In most outcrops, the metamorphic sole is dissected by several...Stout (1981) report K-feldspar coexisting with albite from Wadi Tayin, whereas Searle & Malpas (1980) |  | Zhang, Zhaochong, Kang, Jianli, Kusky, Timothy, Santosh, M., Huang, He, Zhang, Dongyang, Zhu, Jiang (2012) Geochronology, geochemistry and petrogenesis of Neoproterozoic basalts from Sugetbrak, northwest Tarim block, China: Implications for the onset of Rodinia supercontinent breakup. Precambrian Research, 220. 158-176 doi:10.1016/j.precamres.2012.08.002 | Journal (article/letter/editorial) | | basalts from Sugetbrak, northwest Tarim block, China: Implications for the onset of Rodinia supercontinent...Resources, China University of Geosciences, Beijing, 100083, China Tianjin Center, China Geological Survey...Tianjin, 300170, China c State Key Laboratory of Geological Process and Mineral Resources, China University...University of Geosciences, Wuhan, 430074, China b a r t i c l e i n f o Article history: Received 22 October...region in the northwest Tarim block, Northwest China. The basaltic rocks are composed of augite and plagioclase |  | | Journal (article/letter/editorial) | | Greece. These formations, along with some ophiolite outcrops, have been variably emplaced onto the Pelagonian...in balanced amounts, defining low-temperature blueschist facies metamorphic conditions (~320-340 °C, P≈9-10...over lizardite, suggesting medium-temperature blueschist facies metamorphism (~340–370 °C, P≈10-11 kbar)...antigorite corresponding to medium or high temperature blueschist facies metamorphism (~360–400 °C, P≈12 kbar)...Metaophiolites; metamorphism Exhumation; 39 40 41 1 Blueschist metamorphism; Retrograde ACCEPTED MANUSCRIPT |
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