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metamorphism? UNC sample. SA-19. Rock type eclogite. Locality ? Eclogite. Garnet and Poikiloblastic texture describes porphyroblasts which are riddled with

A symplectite (or symplektite) is a material texture: a micrometre-scale or submicrometre-scale intergrowth of two or more crystals.Symplectites form from the breakdown of unstable phases, and may be composed of minerals, ceramics, or metals. Fundamentally, their formation is the result of slow grain-boundary diffusion relative to interface propagation rate. (1986). Hills, D.V., Haggerty, S.E. (2010) Lawsonite-bearing continental crust meso-and microstructures: evolution of the Sesia-Lanzo Zone (Western Italian Alps, Austroalpine domain). Garmo, T. T. (1998): Tunnellrapport frå Almenningen, Sogn og Fjordane.

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Metamorphism to the eclogite facies frigör en hel del vattenånga från berget, som driver vulkanism i den överliggande vulkanbågen . Eklogit är

(c) Garnet partly replaced by orthopyroxene (Opx) and plagioclase. Eclogite ("ECK-lo-jite") is an extreme metamorphic rock formed by regional metamorphism of basalt under very high pressures and temperatures. This type of metamorphic rock is the name of highest-grade metamorphic facies. The Shuanghe coesite eclogite has experienced a prolonged metamorphic evolution based on the modifications of texture and mineral assemblage described above.

Low-temperature eclogite-facies rocks from Syros and Tinos Cyclades, Greece include meta-ophiolitic coarse-grained textures and locally preserved segre-.

The rock name eclogite was first used by R. J. Haüy in 1822 for a “fancy rock” composed mainly of two minerals “diallage and garnet accompanied accidentally by kyanite, quartz, epidote, and lamellar amphibole.” Two zircon grains from low-Mg mantle eclogite sample Cat-11 have similar internal textures (Fig. 6a) where cores with oscillatory zoning are overgrown by weak, patchy-zoned rims. Classifying these zircon grains with our algorithm suggests that the weak, patchy zoning of both rims, coupled with their low Th/U values (0.05–0.06), is indicative of a metamorphic origin. The textures were generated during omphacite growth on the prograde path of eclogite development until metamorphic peak conditions. Field observations in the Eclogite Zone show that kinematics in garnet mica schist, surrounding the eclogites, strongly indicate an extrusion wedge geometry, including top-N thrusting at the base and a top-S normal faulting with a sinistral shear component at the GeoLines 14 (2002) 103 Microstructure, EBSD-Measured Texture and Seismic Properties of Mantle Eclogite FRB 1300 from the Premier Mine, Kaapvaal Craton, South Africa Typical textures from eclogite breccias described by Angiboust et al. Figure DR-1 from DATA REPOSITORY/ G32925 (URL in text).

After uplift from mantle depths, the eclogite underwent retrograde metamorphism. Some of the omphacite pyroxene was altered into glaucophane & muscovite. But the original eclogite’s mineralogy & overall texture is fairly well preserved. Eclogite texture (BSE) and compositional profile across a garnet grain in sample BEL‐1. (a, b) Garnet porphyroblasts with inclusions of omphacite (Omp), phengite (Ph) and kyanite (Ky), symplectitic texture of diopside (Di) + plagioclase (Pl), and amphibole (Amp) in the matrix. (c) Garnet partly replaced by orthopyroxene (Opx) and plagioclase. Eclogite ("ECK-lo-jite") is an extreme metamorphic rock formed by regional metamorphism of basalt under very high pressures and temperatures.
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Two zircon grains from low-Mg mantle eclogite sample Cat-11 have similar internal textures (Fig. 6a) where cores with oscillatory zoning are overgrown by weak, patchy-zoned rims.