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| 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...metapelites and metagreywackes from the Habutengsu Valley and adjacent area within this belt contain quartz...metagreywackes; metapelites; western Tianshan, China. INTRODUCTION Since coesite was first discovered |
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| Chinese Academy of Sciences, Guangzhou 510640, China. Orcid 0000-0001-6560-0654 2 ARC Centre of Excellence...best-preserved blueschist terranes in the world—have been comprehensively investigated. The blueschist samples...samples contain lawsonite + sodic amphibole + phengite + chlorite + titanite + apatite ± aragonite ± quartz...repository for Sr, Pb, Th, U, and REE, whereas phengite carries the most large-ion lithophile element...and apatite strongly controls Sr. Two groups of blueschist have different origins—enriched continent-derived |
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| 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 |
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| Arrows point to the locations of some of the outcrops of the metamorphic aureole after Searle and Malpas...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...hematite + actinolite + sodic-calcic amphiboles + phengite + quartz + sphene + leucoxene in addition to relict...inclusions of clinopyroxene, rutile, hematite and phengite. The fine-grained almandine garnets of the granoblastic |
 | 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 |
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| 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...lawsonite zone, lie in the central portion of the blueschist belt in the districts of Tavsanli (area 1 in |
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| 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...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...of the marbles have been metamorphosed in the blueschist facies. No grade change across the region is |
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| with blueschists is analogous to the ophiolite-blueschist assemblages recovered from the Mariana forearc...ophiolites presented in this paper are mostly based on co-operative field studies in Primorye (1993, 1998,...'""~"~"";Ei~"iralovaii!ii!~ ophiolitebelts ( N50" CHINA"!!~ Kengevayam' Nablyudeny from N to S)and\i:il...western extension of the Palaeozoic ophiolite-blueschist belt of the SW Japan-Primorye area is also shown...Samarka-Nadanhada terranes in Primorye and northeastern China (Kojima 1989). Palaeozoic ophiolites in southwestern |
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| 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 |
