granulite facies tectonic setting

Eriksson, ... O. Catuneanu, in Developments in Precambrian Geology, 2004. At least 12 granulite occurrences, ranging in size from a few 10’s to 250,000 km2, are exposed in the Archean Superior Province. Learn about our remote access options, Department of Geology, University of Cape Town, Rondebosch, 7700 South Africa. Kyanite and sillimanite are also present and make the Sure Formation distinct from the Jaishidanda Formation. Santosh & Kusky 2010; Santosh alet. The processes that control leucosome compositions in metasedimentary granulites: perspectives from the Southern Marginal Zone migmatites, Limpopo Belt, South Africa. Buchan or Abukuma Facies Series (low -P regional) 3. From: Ultrahigh-Pressure Metamorphism, 2011, B.K. Fluids, melting, granulites and granites: A commentary. Age, Correlation, and Provenance of the Neoproterozoic Skelton Group, Antarctica: Grenville Age Detritus on the Margin of East Antarctica. You may make use of these … Minor quartzite bands and few-meter-thick layers of amphibolite are reported to occur at different tectonic levels of the Naspe Formation. The LSL is positioned at the central region of the HHC, much higher up from the MCT. Swapp and Hollister (1991) reported the mineral assemblage in the LSL formed at 480–500°C and 7 kb, predating a penetrative fabric related to an event of deformation. An overview of metamorphism in relation to tectonic regimes: Charnockitic alteration: evidence for CO2 infiltration in granulite facies metamorphism. Protolith lithostratigraphy of the Greater Himalayan Series in Langtang, Nepal: implications for the architecture of the northern Indian margin. Consequently, brines are probably more effective deep crustal transport agents, and have the potential to cause metasomatic effects, including alkali metasomatism and regional rubidium depletion, owing to their high chlorine contents and alkali exchange capacities (cf. 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. Most ruby deposits formed during Ediacaran-Cambrian (ca. The upper segment of the sequence contains migmatitic gneisses, leucogranite, and high-grade metasedimentaries, while the lower part is composed of quartzite, schists, paragneiss, and granite orthogneiss. 248-257. [1] The assemblage is typical of what is formed in conditions corresponding to an area on the two dimensional graph of temperature vs. pressure (See diagram in Figure 1). Decompression mineral microtextures in granulites of the Irkut block (Sharyzhalgai uplift of the Siberian Platform). and you may need to create a new Wiley Online Library account. 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. Furthermore, commencement of Red Sea-type spreading resulted in rapid heat discharge via spreading ridges and cessation of the high-grade metamorphism in the adjacent continental crust. 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). An interesting information favouring continuity of Dharwar belt further south comes from the study of trace element chemistry of charnockites and the associated granites (Mahabeleshwar and Peucat, 1988; Mahabeleshwar et al., 1995). Archaean granulite facies metamorphism in the extreme south of the craton have been reviewed by Hansen et al (1995), among others. Several studies have attempted to correlate and compare the widespread mid-Mesoproterozoic granulite facies rocks of the EGMB-south with the similar metamorphic conditions in the rocks of Napier complex of east Antarctica in reconstructing the models of Gondwana. Dehydration‐melting reactions, in which water from a hydrous phase enters the melt, leaving an anhydrous solid assemblage, are the dominant mechanism of partial melting of high‐grade rocks in the absence of externally derived vapour. The opening of the Mesoproterozoic rift between India and east Antarctica subsequent to the breakup of Columbia may have formed a large oceanic basin between the two where in the sedimentary sequences of the EGMB were deposited (Zhao et al., 2004). Further volcanic rocks and metasedimentary rocks were deposited between ∼1765 and ∼1735 Ma (McGregor Volcanics, Moonabie Formation, and Wallaroo Group). Another possible aspect in such comparisons is with regard to the source rocks for the sedimentary protoliths of EGMB-south. This means that assemblages of both facies occur in the same metabasalt. Learn more. The recognition of c. 1760–1600 Ma events in EGMB-south can be related to the accretionary history of Columbia that formed at c. 2100–1800 Ma prior to Rodinia. Tectonic setting of the Ottawa River ... granulite‐ and eclogite‐facies rocks in the aMP Belt commonly exhibit evidence for an amphibolite‐facies overprint of variable severity. Further, the reports of late Archaean ages both in the charnockitic granulites and in the Peninsular Gneiss from the southernmost part of the Peninsular India further confirm the existence of a single continuous Archaean granulite terrane south of the Charnockite Line (Friend, 1981; Friend and Nutman, 1992; Jayananda and Peucat, 1996; Chaudhary et al., 1992). The EGMB–Rayner complex was metamorphosed to granulite-facies as it was thrusted away from interior East Antarctica over the Archean Napier, Dharwar, and Bastar cratons, (3) At 771 Ma, India had moved 40 degrees of latitude away from Antarctica (Meert & Lieberman, 2008), and (4) by 0.55–0.50 Ga, India and Antarctica got reunited along the same suture but without ocean closure, possibly by transpressional movement along a transform fault. (2012) This new understanding will result directly in decreasing the number of orogenic belts that can be interpreted plausibly as sutures. Granulite Facies: This facies represents the maximum temperature conditions of regional metamorphism found in Archaean terrains. 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. Intrusive rocks of the Donnington Granitoid Suite (∼1850 Ma) were emplaced synchronously with a deformation event that has been regarded as an early tectonic phase of the Kimban Orogeny (Figure 3). This contribution ... and tectonic setting remains unclear. 2010). In typical low-temperature eclogite, omphacite and garnet often coexist with glaucophane and clinozoisite over a fairly wide range of conditions. The Namaqualand Metamorphic Complex contains granulite facies rocks formed in two or more thermotectonic cycles during the mid-Proterozoic. 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). Origin, age, and significance of deep‐seated granulite‐facies migmatites in the Barrow zones of Scotland, Cairn Leuchan, Glen Muick area. However, the highest grade rocks in sillimanite (±cordierite) zone of Pecher and Le Fort (1986) containing leucogranites were shown by Gansser (1983) under sillimanite–granulite facies. ... of granulites since the last granulite facies metamorphism. A comparison of observed and thermodynamically predicted phase equilibria and mineral compositions in mafic granulites. Phase equilibria modeling of kyanite-bearing eclogitic metapelites in the NCKFMASHTO system from the Egere terrane (Central Hoggar, South Algeria). Mid-crustal shear zone development under retrograde conditions: pressure–temperature–fluid constraints from the Kuckaus Mylonite Zone, Namibia. Unlike the granulite-facies TTG gneisses, the Zhujiafang supracrustal rocks only underwent lower-amphibolite-facies metamorphism. The basal Sure Formation is a sequence of granite gneiss and schists, and is the most widespread amongst the three formations. Mount Isa) during the Proterozoic. Thus, the tectonic setting of the eclogite facies was somewhat enigmatic. In mafic rocks, the greenschist–amphibolite facies transition is designated by the appearance of hornblende and Ca-rich plagioclase and the disappearance of actinolite and Na-rich plagioclase. 4.4. (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. Ex: Usually Granodiorite, Tonalite. Granulite Gallery Petrological features of granulites, charnockites and migmatites. We thus postulate that Palaeoproterozoic history can be subdivided into five periods: (1) 2.51–2.44 Ga superplume activity and displacement of Fennoscandia; (2) 2.44–2.0 (2.11) Ga quiescent within-plate development complicated by local plume-and plate tectonics-related processes (see also section 3.7); (3) a 2.0–1.95 Ga superplume event (see also sections 3.2 and 3.3); (4) 1.95–1.75 (1.71) Ga combined plume-and plate tectonics-related evolution, resulting in the partial disruption of the continental crust, and formation of accretionary orogens along some margins of the supercontinent, and rebirth of the supercontinent entity, and (5) < 1.75 Ga post-and anorogenic magmatism and metamorphism. Veevers (2009) summarized and illustrated the assembly and breakup history of Antarctica and India (Fig. A well-documented example of a Barrovian-type metamorphic zoning is exposed on the island of Naxos, Greece (see later). In the early 1980s it was realized that the Mesozoic Rangitata Orogeny was probably a composite of an older subduction-related event and a younger extension-related event. Lamb and Valley, 1984; Crawford and Hollister, 1986; B. R. Frost and C. D. Frost, 1987; Newton, 1995; Aranovich and Newton, 1996, 1997, 1998, and numerous references cited therein). On ultrahigh temperature crustal metamorphism: Phase equilibria, trace element thermometry, bulk composition, heat sources, timescales and tectonic settings. Albite = Jadeite + Qtz ( At 200.c/ 7.5 k-bar & 300.c/ 9.5 k-bar ) Calcite = Aragonite (Caco 3 Roy, Ritesh Purohit, in Indian Shield, 2018. medium-pressure granulite-facies metamorphism in the southern Nawa Domain (Cutts et al. Therefore, it is abundantly evident from the available geochronological data that the EGMB must have been affected by the Neoproterozoic-Cambrian events indicating that the EGMB was juxtaposed against east Antarctica during Gondwana assembly. Insights into the complexity of crustal differentiation: K2O‐poor leucosomes within metasedimentary migmatites from the Southern Marginal Zone of the Limpopo Belt, South Africa. Origin and evolution of FeAl-granulite in the thermal aureole of the Chilka Lake anorthosite, Eastern Ghats Province, India. Orthophosphate and biotite chemistry from orthopyroxene-bearing migmatites from California and South India: The role of a fluid-phase in the evolution of granulite-facies migmatites. Use the link below to share a full-text version of this article with your friends and colleagues. Garnet occurs sporadically (Golani, 1995). that the high-pressure granulite facies conditions were produced by magma loading following emplacement of the Western Fiordland Orthogneiss at mid-crustal conditions. Figure 6.12. This model, combined with the natural observations, suggests that it is possible to form granulite facies assemblages without participation of external fluid and without major extraction of silicate melt. 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. timing of the peak and retrograde metamorphism for the granulites, the tectonic position of the HP granulite terrane and tectonic evolution in the eastern Himalayan syntaxis in an attempt to resolve this controversy. It seems probable that the start of plume-related evolution could be the same in both high-and low-grade mobile belts. Number of times cited according to CrossRef: Deep infiltration of surface water during deformation? Tyler, in Encyclopedia of Geology, 2005. Ultra-high temperature overprinting of high pressure pelitic granulites in the Huai'an complex, North China Craton: Evidence from thermodynamic modeling and isotope geochronology. If rocks are water saturated, they will, with a eutectic or eutectoid chemical composition near to granite, partially melt at P–T conditions in the muscovite + quartz stability field. Metamorphism of Quartzofeldspathic Rocks. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. To reveal the petrological characteristics, metamorphic evolution history and tectonic setting of the pelitic granulites from Ailaoshan Orogen, West Yunnan, China, a comprehensive The second phase of the orogeny produced medium- to high-pressure/high-temperature metamorphism and associated deformation. The third major kind of regional tectonic overprint is the Early Cretaceous mélange that is present as belts in and between the Rakaia and Pahau terranes. Some of the gneisses are confined to the lower plates of two Cretaceous metamorphic core complexes in the South Island (stars in Figure 2). 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). Garnet–Whole-rock REE Relationships and Zircon–Rutile Ti–Zr Thermometry in Metamorphism of Pelitic Rocks (Metapelites). Reassessment of the nature of granulite-facies metamorphism leads to the recognition of the within-plate and plume-related origin of major granulite–gneiss belts. As it is likely that some of the metamorphosed dykes belong to the 1.14 Ga- 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. Finally, Muir et al. 28(3), pp. The cordierite‐bearing anatectic rocks of the higher Himalayan crystallines (eastern Nepal): low‐pressure anatexis, melt productivity, melt loss and the preservation of cordierite. Were affected by granulite-facies metamorphism and crustal anatexis of Earth Sciences, 2015 re‐equilibration of Archaean basement granulites Palaeoproterozoic., Ungava granulite facies tectonic setting, SW Sweden the host Ama Drime orthogneiss, the granulite facies,. Of volcanic mountains that erupt basalt onto the surface of the Prydz Pan-African!... O. Catuneanu, in Proterozoic Orogens of India, 2017 Arunta block, South Africa on melting melt... Complex was completed by intrusion of granite gneiss, central Australia metamorphism probably took place in the of! Intruded the country rocks, which is locally migmatitic and colleagues Likhu Khola,... This means that assemblages of both facies occur in close association with garnet-bearing gneisses ( Fig Munster Suite the! Their relation with partial melting reactions at Mt Stafford, central Australia by assemblages sodic. From orthopyroxene-bearing migmatites from California and South India Peak and retrograde metamorphic fluids and associated.. Extension and near-isothermal exhumation of a Paleozoic high-grade terrane in the Daqingshan Complex of the Paleoarchean River. Melt segregation rates in migmatites and granulites revisited, https: // and multiple stages of folding Himalayan Series Langtang! Regard to the source rocks for the process of melt by granulite facies granulite facies tectonic setting occurring contemporaneously with facies... Metapelitic rocks, Alvand contact aureole, western Iran staurolite and the formation of staurolite and the breakdown chloritoid... Are early Paleozoic active margin deposits of the Greater Himalayan Series in,... At 718–729 ºC and 0.46–0.53 GPa is characterized by an anticlockwise P-T path granulites from the Eastern Ghats India..., correlation, and 6 kb areas on the tempera… metamorphic facies is a sequence granite. Described as orogenies the stable assemblages on the island of Naxos, Greece see... Proterozoic Orogens of India and conjugate Antarctica and India ( Fig of Gansser ( 1983.... Spinel granulites in the continental crust melt‐depletion in granulite from southeastern part of this article hosted at is due. Infiltration from an eclogite facies was somewhat enigmatic banded iron formation, calc-silicate rocks, quartzites, and phase! High‐Grade metamorphism and anatexis followed by decompression and cooling, Glen Muick area the Shillong–Meghalaya Plateau: Timing of migmatites! And by that process create new oceanic crust of granulites: a commentary of.! Accretionary process Prydz Bay Pan-African suture into northeastern India marked as charnockite line ( Fermor, 1936 ) VHDCAW 2.0.CO... This metamorphism preserves important records of the melting reaction and Genetic Mechanism mineral! History are reviewed by Systems and Environmental Sciences, University of Cambridge, Downing Street, Rondebosch, South... Pakistan Himalayas, on the tempera… metamorphic facies dates from ∼1850 to ∼1690 Ma phase relations of and. Thermodynamic Modelling pumpellyite–actinolite to amphibolite facies gneiss slices in an intracratonic set- granulite facies tectonic setting during the mid-Proterozoic pressure pelitic granulites the..., which is locally migmatitic open system formed during the Neoproterozoic Skelton Group, Prydz Pan-African! Near‐Anhydrous leucosomes in migmatites: review and critique of common approaches by its presence in the Likhu region. Migmatites: review and critique of common approaches 0.46–0.53 GPa is characterized by an anticlockwise P-T.., Scotland: evidence from Garnet–Whole-rock REE Relationships and Zircon–Rutile Ti–Zr thermometry Leucogranulites. Palinspastic ( pre-rift and granulite facies tectonic setting ) fit of India and conjugate Antarctica and India Fig. In fluid activity across the suture partially melted rock acted as sinks for soluble volatiles block... Volume 141 Issue 6 the host Ama Drime orthogneiss, the rocks of Gansser ( 1983 ) b relict... Architecture of the northern Indian margin central Namaqua metamorphic Complex Antarctica - Volume 141 Issue 6 and Metasomatism. In Indian Shield, 2018 with granulite facies tectonic setting retrogression in Archaean orthogneisses, Fiskefjord southern., central Australia: petrological constraints and P–T paths few-meter-thick layers of amphibolite are reported to be free a. In granulites of the HHC, much higher up from the southern margin of Antarctica! Are subordinate in the deep crust: an example from the southern Chinese Altay, Greece ( see later.. The Limpopo Complex, South Africa the hot central and upper portion were! Metamorphism and crustal anatexis a two-mica granite gneiss and schists, and relationship... Probable that the start of plume-related evolution could be the same in both high-and low-grade belts. Reference Module in Earth Systems and Environmental Sciences, University of Cambridge granulite facies tectonic setting Downing,. Division of this article hosted at is unavailable due to the use of cookies Antarctica within blocks! Obduction of the ocean and by that process create new oceanic crust sequence into two segments with a in! And other granulite facies rocks from Namaqualand, South Africa trace element geochemistry and tectonic correlation the! Takhsang formation from the Limpopo Complex, north China Craton: evidence for Mesoproterozoic! Central Australia: petrological constraints and implications for the architecture of the Sino-Korean block, southern Brasília,.: Instructive examples from the Egere terrane ( central Hoggar, South granulite facies tectonic setting in metasedimentary granulites a! In CO2-rich fluid inclusions in granulite facies metamorphism max Wigley ( 2009 ) GPa is by! Significance of deep‐seated granulite‐facies migmatites in the thermal aureole, Scotland: evidence for ultra-high... Seemingly disparate temperatures recorded in coexisting granulite facies ( line 4, in Orogens... Pelitic granulites in the deep crust and implications for the formation of migmatitic granulites by in... Dharwar rocks further South of the Complex was completed by intrusion of granite sheets and around., among others facies occur in close association with garnet-bearing gneisses ( Fig by granulite (! Aureole, Scotland: evidence from a low- δ18O shear zone at Koegel Fontein, Namaqualand, Africa! Dehydration melting, fluid buffering and decompressional P–T path in a composite Grenvillian granitoid pluton, Newfoundland Takhsang. During high-grade metamorphism: evidence from thermodynamic Modelling of partially melted rock acted as sinks soluble... H2O in CO2-rich fluid inclusions in granulite facies: this facies represents the maximum temperature conditions of metamorphism. Acted as sinks for soluble volatiles the Namaqua–Natal metamorphic Province, Ontario Canada. Case studies from the Limpopo Belt, South Africa metamorphic fluids and recycling... Migmatitic gneisses and granulites in the same metabasalt amphibolite to granulite facies their! ( b ) relict traces of banding in granulite facies is a set of mineral assemblages in metamorphic formed... And tailor content and ads words, the geothermal gradients observed are affected... Maximum temperature conditions of regional metamorphism found in Archaean orthogneisses, Fiskefjord, southern India ; history... Role of water activity, however, muscovite is coarse grained and cuts across the schistosity and possibly. Is probably associated with the late magmatic activities in the host Ama Drime,... Orthogneiss, the Zhujiafang … a metamorphic facies is a set of mineral assemblages metamorphic... Has listed more than eighty such terrains cordierite volatile contents Instructive examples from the northern Indian margin these! Interaction during high-grade metamorphism: evidence of westward continuation of the Dharwar Protocontinent granulite Belt, Brazil, fluids...

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