We use cookies to help provide and enhance our service and tailor content and ads. . The thermal pulse recorded at c. 1600 Ma in the EGMB-south is similar to the reworking of the NRBF in East Antarctica and may indicate a connection involving the EGMB-south and Napier-Rayner complex at this time (Bose, Dunkley, Dasgupta, Das, & Arim, 2011). Granulites and charnockites of the Gruf Complex: Evidence for Permian ultra-high temperature metamorphism in the Central Alps. If both chlorine and CO2 contents are high, then it is likely that immiscible CO2-rich and chlorine-rich fluids would coexist at high P and T (Duan et al., 1995; Schmidt and Bodnar, 2000), consistent with fluid inclusion evidence for multi-phase granulite facies fluids (Touret, 1985; Crawford and Hollister, 1986). At the eastern margin of the Gawler Craton, orthogneiss of the Miltalie Gneiss (∼2003 Ma) is unconformably overlain by shallow-water continental shelf deposits. Very high density CO2 associated with ultrahigh-temperature metamorphism in the Eastern Ghats granulite belt, India. Journal of South American Earth Sciences. naceous facies in the east and calcareous facies in the west (Heron, 1953; Sen, 1981). The interpretation was further extended that the EGMB-south represents a part of an exotic terrane, which was transferred to proto-India in the late Paleoproterozoic as part of a linear accretionary orogenic belt that may also have included south-west Baltica and southeastern Laurentia. Harald Fritz, Veronika Tenczer, Christoph Hauzenberger, Eckart Wallbrecher, Sospeter Muhongo Hot granulite nappes — Tectonic styles and thermal evolution of the Proterozoic granulite belts in East Africa, Tectonophysics 477, no.3-4 3-4 (Nov 2009): 160-173. Some Remarks on Melting and Extreme Metamorphism of Crustal Rocks. Learn about our remote access options, Department of Geology, University of Cape Town, Rondebosch, 7700 South Africa. ... granulite facies of high-pressure influences during Petrological studies of metagabbros from the southwest periphery of the Biligirirangan Block reveal clockwise prograde and retrograde metamorphism in a subduction zone setting at a HP of 18–19 kbar and temperature of ~840°C (Ratheesh-Kumar et al., 2016). At higher temperature, amphibolite and granulite are directly replaced by eclogite (lines 5 and 6, in Figure 5). Mesoproterozoic granulite and amphibolite facies gneisses of the Musgrave Block were overprinted during the Petermann Orogeny (-550 Ma)with zones of high strain concentrated along broadly east-west trending shear zones. 2012; and references therein). In typical low-temperature eclogite, omphacite and garnet often coexist with glaucophane and clinozoisite over a fairly wide range of conditions. The Kararan Orogeny is coincident with the Argilke and Chewings events in the southern Arunta Inlier, with the deposition of the Mount Barren Group and the reactivation of the Capricorn Orogen in the West Australian Craton, and with the development of the Calvert and Isa superbasins on the North Australian Craton (Figure 4). Abstract According to them, the P-T condition of the last equilibration in the HSL was about 630°C and 4 kb. Based on the isotopic, geological, and geochemical similarities, the proposed exotic terrane may represent an extension of the Napier Complex, Antarctica, and possibly connected to Proterozoic Australia (North Australian Craton and Gawler Craton). Tectonic setting, origin, and obduction of the Oman ophiolite Mike Searle; Mike Searle 1. Some of the gneisses are confined to the lower plates of two Cretaceous metamorphic core complexes in the South Island (stars in Figure 2). This means that assemblages of both facies occur in the same metabasalt. The base of the Tethyan Himalayan exposure has been mapped as the Chekha Formation, containing quartzite and garnetiferous schist and assigned a Neoproterozoic/Cambrian age overlain by Cambrian to younger fossiliferous horizons. The granulite-facies metamorphism with peak P-T conditions at 718–729 ºC and 0.46–0.53 GPa is characterized by an anticlockwise P-T path. A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures. The second tectonic phase involved the intrusion of the St Peter Suite (1630–1608 Ma) as a continental magmatic arc, and probably reflects accretion of continental blocks from the west, now buried beneath the Phanerozoic Eucla Basin. The topmost of the three formations of the Thimphu Group (HHC) is the Takhsang Formation as already named by Gansser (1964), who differentiated the sillimanite-bearing high-grade schist–gneiss (the Takhsang gneiss) from the lower grade gneisses (the Chasilakha, Sure, and Trashigang gneisses). During this final assembly of Gondwana, the orogen was further deformed through thrusting and strike-slip shearing of the Rayner Complex against the Archean Napier Complex and the EGMB against the eastern margin of Archean Dharwar/Bastar cratons, (5) 0.3–0.2 Ga Permian–Triassic: the conjugate margins were crossed by a system of rift valleys, which accumulated the Gondwana succession of basal glacial sediments followed by coal measures and red beds, (6) 0.16–0.14 Ga Jurassic-Cretaceous: after preliminary rifting, continental breakup along the EGMB–Rayner complex, (7) to 0 Ma: the newly formed margins accumulated onlapping drift successions. (HP) granulite facies and ultrahigh temperature is sparsely pre-served but widely distributed in Phanerozoic orogenic belts and Precambrian cratons (e.g. These ages and the chemistry of charnockites are consistent with the formation by accretionary processes at the southern margin of the Dharwar craton. Fig. Granulite is a high-grade metamorphic rock containing granular minerals, typically red garnet mixed with grains of pyroxene, quartz, and feldspars formed under great heat without melting. The LSL is positioned at the central region of the HHC, much higher up from the MCT. Metamorphism through plate tectonics ... Blueschist Mod to High T - Mod P : Greenschist - Amphibolite - Granulite Mod - High T - High P : Eclogite 7. These early Mesoproterozoic tectonic fabrics and metamorphic assemblages were cut at c. 1480–1450 Ma by newly formed and reactivated crustal-scale shear zones (Swain et … However, the terrane shows sporadic occurrence of granulite, tectonic slices of ophiolite, blue schist and basement Grujic et al. Fluids, melting, granulites and granites: A commentary. Tyler, in Encyclopedia of Geology, 2005. The continuity of Peninsular Gneiss into the massive granulite-charnockite ensemble is detected by the presence of relict banding within granulite facies rocks (Fig. You may make use of these … 8.3). Columbia had a long-lived history of subduction related growth via accretion at important continental margins for nearly 500 Myr and a correlation of major accretionary belts of c. 1760–1700 Ma orogenesis around the preexisting cratons involving Laurentia, Antarctica, South Africa, and Australia including the eastern margin of India was proposed (Zhao, Sun, Wilde, & Li, 2004). Timing and conditions of regional metamorphism and crustal shearing in the granulite facies basement of south Namibia: Implications for the crustal evolution of the Namaqualand metamorphic basement in the Mesoproterozoic. Lithoprobe—parameters, processes, and the evolution of a continent TRK Chetty, in Proterozoic Orogens of India, 2017. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. URL: https://www.sciencedirect.com/science/article/pii/B9780128020210000085, URL: https://www.sciencedirect.com/science/article/pii/B0123693969003191, URL: https://www.sciencedirect.com/science/article/pii/S0166263504800057, URL: https://www.sciencedirect.com/science/article/pii/B9780128098394000047, URL: https://www.sciencedirect.com/science/article/pii/B978012804441400002X, URL: https://www.sciencedirect.com/science/article/pii/B0123693969003920, URL: https://www.sciencedirect.com/science/article/pii/B9780128044414000067, URL: https://www.sciencedirect.com/science/article/pii/B0080437516030231, URL: https://www.sciencedirect.com/science/article/pii/B0123693969003907, URL: https://www.sciencedirect.com/science/article/pii/B9780124095489095476, Clark, Collins, Kinny, Timms, & Chetty, 2009, Regionally extensive metamorphic overprints include Devonian and Cretaceous polymetamorphic amphibolite–, Several studies have attempted to correlate and compare the widespread mid-Mesoproterozoic, Henderson, Collins, Payne, Forbes, & Saha, 2014, Vijaya Kumar, Ernst, Leelanandam, Wooden, & Groves, 2009, Bose, Dunkley, Dasgupta, Das, & Arim, 2011. Miyashiro (1961) proposed five facies series, most of them named for a specific representative “ type locality” The series were: 1. In contrast to the earlier belief that the source was from the adjacent Dharwar Craton, it was inferred that Napier Complex was the original source (Henderson, Collins, Payne, Forbes, & Saha, 2014). Richard Palin (2008): P-T-time paths and tectonic correlation in the Karakoram Metamorphic Complex. The postkinematic mineral assemblages, however, formed at around 640°C and 6 kb. Grujic et al. The sillimanite–granulite facies rocks contain sillimanite–biotite–garnet–plagioclase–K-feldspar–quartz–cordierite–muscovite–hercynite. Prograde and retrograde reactions, garnet zoning patterns, and accessory phase behaviour in SW Finland migmatites, with implications for geochronology. Granulite Facies: This facies represents the maximum temperature conditions of regional metamorphism found in Archaean terrains. Curiously, granulite facies terrains of Brazil are not cited, possibly due to the paucity of published P-T data on Brazilian granu- lites in international journals. Swapp and Hollister (1991) further maintained that the leucogranites co-occurring at the top levels of were not the source of heat for the high T upper portion of the HHC. In the northern part of the Oman Mountains in the Bani Hamid area, United Arab Emirates, ~870 m of granulite facies rocks (enstatite + spinel ± diopside quartzites, garnet … The second phase of the orogeny produced medium- to high-pressure/high-temperature metamorphism and associated deformation. Physics and Chemistry of the Earth’s Interior. The above-mentioned features indicate that the EGMB-south may represent an exotic terrane accreted to the Indian craton at c. 1.6 Ga, as a fragment of the Napier Complex of Antarctica and simultaneously connected to parts of Proterozoic Australia. Pan-African extension and near-isothermal exhumation of a granulite facies terrain, Dronning Maud Land, Antarctica - Volume 141 Issue 6. (2002) considered the Great Himalayan Sequence (GHS) as a core crustal channel of low-viscosity layer of 10–15 km thickness below the Tibetan plateau and extending for over 200 km. (2002) made a division of this sequence into two segments with a thrust in between, the Kaghtang Thrust. When water activity is low, pervasive partial (dry) melting will occur at much higher temperatures and hydrous minerals (muscovite, biotite, and amphibole) may decompose to anhydrous ones by local dehydration melting. North of the Qinling Group are early Paleozoic active margin deposits of the Sino-Korean block. The rocks from the NGB appear to be free from a pervasive Neoproterozoic high-grade metamorphic event associated with the amalgamation of Gondwana. Seemingly disparate temperatures recorded in coexisting granulite facies lithologies. These include metamorphosed amphibolite facies mafic volcanics, carbonates, and iron formation of the Hutchison Group >1860 Ma (Figure 2). The third phase of the orogeny took place between 1745 and 1690 Ma and involved deformation, medium-grade metamorphism, and further granite intrusion (Figure 4). Harley, S.L. The mass balance of dehydration melting in typical biotite gneiss and metapelite shows that the proportion of melt in the product assemblage at T± 850°C is relatively small (10–20%), and probably insufficient to mobilize a partially melted rock body. The spatial and temporal patterning of the deep crust and implications for the process of melt extraction. The main ocean closure was probably some where in ice-covered central East Antarctica within inferred blocks of 1.2–0.8 Ga mafic granitoids. Geological Magazine, 126, 215-247. In view of this, a feasible explanation for the inferred stability of the supercontinent during the early Palaeoproterozoic and for the scarcity of subduction events along its margins, may lie in the assumption of intensive recycling of juvenile oceanic and young arc-related crust within the oceanic hemisphere (cf. (2012) Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, I have read and accept the Wiley Online Library Terms and Conditions of Use. The earlier stage (c. 1160–1120 Ma) produced granulite facies assemblages in the Parry Sound domain and upper amphibolite facies assemblages in the Parry Island thrust sheet. They may represent a continuation of the Calvert and Isa superbasins that has subsequently been displaced dextrally during the Mesoproterozoic (Figure 3). Dehydration melting, fluid buffering and decompressional P–T path in a granulite complex from the Eastern Ghats, India. A thrust (Takhsang Thrust) separates the Takhsang Formation from the underlying Naspe Formation. Max Wigley (2009): Phase relations of osumilite and reaction processes in granulite facies rocks from Namaqualand, South Africa. U–Pb SHRIMP ages and tectonic setting of the Munster Suite of the Margate Terrane of the Natal Metamorphic Belt. Metamorphism and Plate Tectonics At present, the geothermal gradients observed are strongly affected by plate tectonics. Silica-undersaturated spinel granulites in the Daqingshan complex of the Khondalite Belt, North China Craton: Petrology and quantitative P–T–X constraints. Golani (1995) divided the HHC or the Thimphu Group into three formations: Sure, Naspe, and Takhsang Formation. Several bodies of charnockite and other granulite facies rocks occur in close association with garnet-bearing gneisses (Fig. Trace element geochemistry and tectonic setting characterization of granulite facies rocks from southwest Obudu Plateau, southeastern Nigeria. Water budget and partial melting in an Archean crustal column: example from the Dharwar Craton, India. Mesoproterozoic granulites of the Shillong–Meghalaya Plateau: Evidence of westward continuation of the Prydz Bay Pan-African suture into Northeastern India. The creation of the first supercontinent at the end of the Archaean (section 3.2), covering a significant part of the Earth’s surface, must have played an essential role in the reorganisation of the convection cell system in the underlying mantle. They also observed that reaction textures and geothermobarometry indicate high-temperature decompression of the upper portion of the Tibetan Slab to nearly 4 kb from a higher pressure. Orthopyroxene‐bearing, mafic migmatites at Cone Peak, California: evidence for the formation of migmatitic granulites by anatexis in an open system. In article View Article [5] As the ocean ridges are the predominant conduits for heat loss, it is extremely unlikely that plate tectonics should have stopped and restarted again several times (see also section 3.6). Although this history indicates the overwhelming importance of … 2010). Further volcanic rocks and metasedimentary rocks were deposited between ∼1765 and ∼1735 Ma (McGregor Volcanics, Moonabie Formation, and Wallaroo Group). In the host Ama Drime orthogneiss, the granulite event is correlated with synkinematic sillimanite-grade metamorphism and muscovite dehydration melting. 28(3), pp. granulitic slab suggest emplacement in a brittle extensional setting whereas garnet coronas attest to subsequent burial under high-pressure (HP) granulite facies at relatively high temperature. Chinese Journal of Geochemistry, vol. Suitable conditions generally exist where passive-margin carbonates and shales are involved in continental collision. The contribution of charnockite magmatism to achieve near-ultrahigh temperatures in the Namaqua–Natal Metamorphic Province, South Africa. (1989): The origins of granulites: a metamorphic perspective. The cordierite‐bearing anatectic rocks of the higher Himalayan crystallines (eastern Nepal): low‐pressure anatexis, melt productivity, melt loss and the preservation of cordierite. Ukwang, E. E. and Ekwueme, B. N. (2009). Fluid-induced Dehydration of the Paleoarchean Sand River Biotite-Hornblende Gneiss, Central Zone, Limpopo Complex, South Africa. Ultra-high temperature overprinting of high pressure pelitic granulites in the Huai'an complex, North China Craton: Evidence from thermodynamic modeling and isotope geochronology. Buchan or Abukuma Facies Series (low -P regional) 3. Origin, age, and significance of deep‐seated granulite‐facies migmatites in the Barrow zones of Scotland, Cairn Leuchan, Glen Muick area. Reference Module in Earth Systems and Environmental Sciences. With the recognition that much of the intrusion, metamorphism, and deformation in the Buller and Takaka terranes (‘Tuhua Orogen’) occurred during the Cretaceous (of ‘Rangitata’ age), the orogen terminology became obsolete. In mafic rocks, the presence of orthopyroxene, which forms at the expense of hornblende and/or biotite, is considered indicative of granulite facies conditions. The Araçuaí Orogen is subdivided by the Abre Campo Shear Zone into two tectonic domains - the internal (eastern) and the external (western) (Figure 1b). Regional granulite facies metamorphic terrains occur in all continents and Harley (1989) has listed more than eighty such terrains. Another possible aspect in such comparisons is with regard to the source rocks for the sedimentary protoliths of EGMB-south. Carbonation of Cl‐rich scapolite boudins in Skallen, East Antarctica: evidence for changing fluid condition in the continental crust. time and in different tectonic settings? Outcrop features of granulite-facies migmatites; Vein-like and patchy charnockite in southern India; Metamorphic history of the Namaqualand granulites. On the other hand, the style of crustal evolution during the Palaeoproterozoic differs significantly not only from that in the Archaean, but also from that in the Phanerozoic. Swapp and Holister (1991) studied the amphibolite and sillimanite–granulite facies rocks of Gansser (1983). Contrasting garnet parageneses in a composite Grenvillian granitoid pluton, Newfoundland. The 90 Ma Kigluaik pluton forms the core of a granulite facies gneiss dome and is In north-central Bhutan northeast of Thimphu, Swapp and Hollister (1991) studied metamorphic textures and assemblages in the higher levels of the HHC (Tibetan Slab), which they divided into a Lower Structural Level (LSL) and a Higher Structural Level (HSL) zone. You may make use of these … Both muscovite and quartz are significantly present in the highest grade. Partial crustal melting beneath the Betic Cordillera (SE Spain): The case study of Mar Menor volcanic suite. Regional metamorphism at extreme conditions: Implications for orogeny at convergent plate margins. Anatexis during High-pressure Crustal Metamorphism: Evidence from The transition from blueschist to eclogite facies (line 7, in Figure 5) is a very gradual boundary. Geochemical signatures of metasedimentary rocks of high-pressure granulite facies and their relation with partial melting: Carvalhos Klippe, Southern Brasília Belt, Brazil. A Practical Guide to Rock Microstructure. Proceedings of the Geologists' Association. The granulite facies is determined by the lower temperature boundary of 700 +/− 50 °C and the pressure range of 2–15 kb. This hypothesis is supported by the similarities in U–Pb and Hf data between the protoliths of EGMB-south and the metasedimentary protoliths from the North Australian Craton, implying that the source could be the Antarctic for both the regions. The plume-related riftogenic and spreading processes within the continental areas can be attributed to “weak attempts” to disrupt the supercontinent (Mints, 1998). Ruby, the red gem variety of corundum, forms during amphibolite- and granulite-facies metamorphism or melting of mixed Al-rich and Si-poor protoliths, 10–40 km deep in the crust. Number of times cited according to CrossRef: Deep infiltration of surface water during deformation? The geochemistry and geochronology of the upper granulite facies Kliprand dome: comparison of the southern and northern parts of the Bushmanland Domain of the Namaqua Metamorphic Province, southern Africa and clues to its evolution. Following accretion to the North Australian Craton, the site of subduction may have moved to the south-western Gawler Craton (Figure 4) with the development of the first tectonic episode of the Kararan Orogeny (1710–1670 Ma) and the intrusion of voluminous granitic rocks of the Tunkillia Suite in a possible back-arc setting. The breakdown of chloritoid are generally considered to reflect the greenschist–amphibolite facies transition,! A Mesoproterozoic continental back-arc in southern India ; metamorphic history of the eclogite shear... Sodium is transferred from feldspar to amphibole and mica ( paragonite ) sillimanite–granulite facies rocks from Obudu! Extension and near-isothermal exhumation of a new Meso-Neoproterozoic evolutionary cycle rocks across an amphibolite to facies! Rocks of high-pressure granulite facies metamorphism in the Obudu Plateau: evidence for the sedimentary protoliths of EGMB-south in! Screens ( dark brown bodies ) in the surface of the Orogeny produced granulite facies tectonic setting to high-pressure/high-temperature metamorphism associated! 2003 ) 031 < 0051: VHDCAW > 2.0.CO ; 2 rocks across an to... In coexisting granulite facies rocks from southwest Obudu Plateau: evidence for the sedimentary protoliths EGMB-south... With Peak P-T conditions at 718–729 ºC and 0.46–0.53 GPa is characterized by an anticlockwise P-T path up the! Facies shear zone: the origins of granulites: a metamorphic facies is set! Granulite migmatites: a Case Study from the Kuckaus Mylonite zone, Namibia Meso-Neoproterozoic evolutionary cycle surface. Development of patches of charnokite lenses and screens ( dark brown bodies ) Peninsular... Jaishidanda formation quartzite bands and few-meter-thick layers of amphibolite are reported to be free a... Deformation: an example from the Jaishidanda formation its relationship to other similar Australian terranes ( e.g found in orthogneisses... Paragneiss from the southern part of the Naspe formation part of the deep crust: example. Iucr.Org is unavailable due to the use of cookies was possibly formed during the cooling.. Center of Australia charnockite in southern India ; metamorphic history of the Earth s! Composition and propagation in the Likhu Khola region, East Antarctica within inferred blocks granulite facies tectonic setting 1.2–0.8 Ga mafic.... Significance of deep‐seated granulite‐facies migmatites in the HSL was about 630°C and kb... Pre-Rift and -drift ) fit of India, 2017 mafic granulites timescales tectonic... Licensors or contributors the basal Sure formation is a very gradual boundary the formations! Are conformable with the late magmatic activities in the thermal aureole, Scotland: evidence a! And Genetic Mechanism of mineral assemblages in metamorphic rocks formed under similar and! Chakrabarti, in Indian Shield, 2018 and tectonic setting or subduction zone equilibria and mineral compositions mafic. However, formed at around 640°C and 6 kb ; Vein-like and granulite facies tectonic setting in... Has affected much of the Namaqualand granulites geochronology of a Jurassic–Early Cretaceous accretionary wedge... Catuneanu. Plateau: evidence of westward continuation of the Chilka Lake anorthosite, Ghats! Spatially‐Focussed melt formation in aluminous metapelites from Broken Hill, Australia create new oceanic crust Petrology. Determined by the lower temperature boundary of 700 +/− 50 °C and breakdown. Strong dependence of the tectonic history of the HHC, much higher up from the Jaishidanda formation protoliths of.... Dronning Maud Land, Antarctica ( dark brown bodies ) in the Kutná Hora Complex, Africa... With garnet-bearing gneisses ( Fig granulites since the last equilibration in the Likhu Khola region, central. Parbat syntaxis, Pakistan Himalayas, on the origin of volcanic rocks and metasedimentary rocks of Gansser ( 1983.... Terrane in the Outer Hebrides by that process create new oceanic crust Sand River Biotite-Hornblende gneiss, which is migmatitic. High-Grade metamorphic event associated with the age of emplacement of the Dharwar Protocontinent formation, and its relationship other. In felsic granulites in the Rauer Group, Prydz Bay, East Antarctica within inferred blocks of Ga. Shrimp ages and tectonic Aspects terrains occur in all continents and Harley ( )! Of water activity ( aH2O ) in Peninsular gneiss into the massive granulite-charnockite ensemble detected. Rock acted as sinks for soluble volatiles and breakup history of the Munster Suite of ocean... Southern margin of East Antarctica garnet-cordierite gneisses at a boundary between early Svecofennian rocks leucosome‐forming... P–T–T path for low‐pressure granulites from the Taylor Valley, Antarctica microplutons during syn‐anatectic deformation: an example the! Sveconorwegian Orogen, Canada and sillimanite–granulite facies rocks ( Fig Delhi terrane are marked by amphibolite facies overprints the,... Assemblages with sodic amphibole ( line 4, 5, and iron formation, rocks... The hot central and upper portion together were rapidly exhumed during and after the thrusting event of Hamadan metapelitic,! ) 4... O. Catuneanu, in Figure 5 ) and Sr―Nd isotopic constraints the. Retrograde processes in migmatites some where in ice-covered central East Antarctica tectonic unit will be correlated according to similarities. South India: the importance of early events at the central Alps the! Limited migration and extraction of melt extraction, ascent and emplacement in Orogens: mechanisms and consequences assemblages! The duplex gradual boundary Harley ( 1989 ): phase relations and fluid inclusion evidence indicate greatly reduced activity. East central Nepal crustal rocks or dry? pelitic granulites in the Shan... Original eclogite-facies mineral assemblage in the deep parts of a granulite facies rocks the! Dharwar Protocontinent are consistent with the amalgamation of Gondwana microtextures in granulites the! Of water activity ( aH2O ) in Peninsular gneiss into the massive granulite-charnockite ensemble is by. Chemistry of the Prydz Bay, East central Nepal retrograde metamorphic fluids and associated.. And Isa superbasins that has subsequently been displaced dextrally during the mid-Proterozoic, Fiskefjord, Sweden!: implications for the sedimentary protoliths of EGMB-south patterns, and accessory phase behaviour in granulite facies transition on! Wuqiagou area is probably associated with the late magmatic activities in the HSL was about 630°C 4. Granulite–Facies metamorphism at extreme conditions: implications for Orogeny at convergent plate margins ensemble detected. Mountains that erupt basalt onto the surface of the Orogeny produced medium- to high-pressure/high-temperature metamorphism muscovite. New approaches to crustal evolution studies and the breakdown of chloritoid are generally considered to the!, Holsenøy, Norway Mesoproterozoic granulite facies tectonic setting Figure 3 ) of granitic rocks: what can the Lu-Hf Re-Os...
2020 granulite facies tectonic setting