Log in

Relevant bibliographies by topics / Granulite facies metamorphism / Journal articles

To see the other types of publications on this topic, follow the link: Granulite facies metamorphism.

Journal articles on the topic 'Granulite facies metamorphism'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Granulite facies metamorphism.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

ENGVIK, A. K., and B. BINGEN. "Granulite-facies metamorphism of the Palaeoproterozoic – early Palaeozoic gneiss domains of NE Mozambique, East African Orogen." Geological Magazine 154, no. 3 (2016): 491–515. http://dx.doi.org/10.1017/s0016756816000145.

Full text

Abstract:

AbstractGranulite-facies metamorphism recorded in NE Mozambique is attributed to three main tectonothermal events, covering more than 1400 Ma from Palaeoproterozoic – early Palaeozoic time. (1) Usagaran–Ubendian high-grade metamorphism of Palaeoproterozoic age is documented in the Ponta Messuli Complex by Grt-Sil-Crd-bearing metapelites, estimated to pressure (P) 0.75 ± 0.08 GPa and temperature (T) 765 ± 96°C. The post-peak P-T path is characterized by decompression followed by near-isobaric cooling. (2) Irumidian medium- to high-pressure granulite-facies metamorphism is evident in the Unango

APA, Harvard, Vancouver, ISO, and other styles

2

Timmermann, Hilke, Rebecca A. Jamieson, Randall R. Parrish, and Nicholas G. Culshaw. "Coeval migmatites and granulites, Muskoka domain, southwestern Grenville Province, Ontario." Canadian Journal of Earth Sciences 39, no. 2 (2002): 239–58. http://dx.doi.org/10.1139/e01-076.

Full text

Abstract:

We present new field observations and petrologic and geochronological data from the Muskoka domain in the southwestern Grenville Province of Ontario in an attempt to constrain the relationship between amphibolite-facies and granulite-facies gneisses in areas of transitional metamorphic grade, and to examine their implication for tectonometamorphic models for the Grenville Province of Ontario. The predominant medium-grained amphibolite-facies migmatitic orthogneisses of the Muskoka domain contain several generations of leucosome, some of which are related to southeast-directed extensional struc

APA, Harvard, Vancouver, ISO, and other styles

3

Campos, José C. S., Maurício A. Carneiro, and Miguel A. S. Basei. "U-Pb evidence for late Neoarchean crustal reworking in the Southern São Francisco Craton (Minas Gerais, Brazil)." Anais da Academia Brasileira de Ciências 75, no. 4 (2003): 497–511. http://dx.doi.org/10.1590/s0001-37652003000400008.

Full text

Abstract:

The Passa Tempo Metamorphic Complex is one of several metamorphic complexes that form the Archean sialic crust of the southern São Francisco Craton. It encompasses hypersthene-bearing gneissic rocks, with subordinateNW- or EW-trending mafic-ultramafic bodies and granodioritic to alkali-granitic, weakly foliated, and light-colored granitoids. These granitoids are the product of generalized migmatization that followed granulite-facies metamorphism. To determine the ages of the granulite-facies metamorphism and granitoid genesis, we obtained U-Pb ages on zircon extracted from the mesosome and leu

APA, Harvard, Vancouver, ISO, and other styles

4

Dasgupta, Somnath, Pulak Sengupta, A. Mondal, and M. Fukuoka. "Mineral chemistry and reaction textures in metabasites from the Eastern Ghats belt, India and their implications." Mineralogical Magazine 57, no. 386 (1993): 113–20. http://dx.doi.org/10.1180/minmag.1993.057.386.11.

Full text

Abstract:

AbstractThree types of mafic granulites, namely two pyroxene-plagioclase granutite (MG), two pyroxeneplagioclase-garnet granulite (GMG) and spinel-olivine-plagioclase-two pyroxene granulite (SMG) are exposed at Sunkarimetta, Eastern Ghats belt, India. The marie granulites exhibit a foliation concordant with that in associated granulite facies quartzofeldspathic gneisses. Textural characteristics and mineral chemical data suggest the following mineral reactions: olivine + plagioclase = spinel + orthopyroxene + clinopyroxene (SMG), orthopyroxene + plagioclase = garnet + quartz (GMG), clinopyroxe

APA, Harvard, Vancouver, ISO, and other styles

5

PRAKASH, DIVYA, DEEPAK, PRAVEEN CHANDRA SINGH, et al. "Reaction textures and metamorphic evolution of sapphirine–spinel-bearing and associated granulites from Diguva Sonaba, Eastern Ghats Mobile Belt, India." Geological Magazine 152, no. 2 (2014): 316–40. http://dx.doi.org/10.1017/s0016756814000399.

Full text

Abstract:

AbstractThe Diguva Sonaba area (Vishakhapatnam district, Andhra Pradesh, South India) represents part of the granulite-facies terrain of the Eastern Ghats Mobile Belt. The Precambrian metamorphic rocks of the area predominantly consist of mafic granulite (±garnet), khondalite, leptynite (±garnet, biotite), charnockite, enderbite, calc-granulite, migmatic gneisses and sapphirine–spinel-bearing granulite. The latter rock type occurs as lenticular bodies in khondalite, leptynite and calc-granulite. Textural relations, such as corroded inclusions of biotite within garnet and orthopyroxene, resorbe

APA, Harvard, Vancouver, ISO, and other styles

6

BHATTACHARYA, S., RAJIB KAR, S. MISRA, and W. TEIXEIRA. "Early Archaean continental crust in the Eastern Ghats granulite belt, India: isotopic evidence from a charnockite suite." Geological Magazine 138, no. 5 (2001): 609–18. http://dx.doi.org/10.1017/s0016756801005702.

Full text

Abstract:

The Eastern Ghats granulite belt of India has traditionally been described as a Proterozoic mobile belt, with probable Archaean protoliths. However, recent findings suggest that synkinematic development of granulites took place in a compressional tectonic regime and that granulite facies metamorphism resulted from crustal thickening. The field, petrological and geochemical studies of a charnockite massif of tonalitic to trondhjemitic composition, and associated rocks, document granulite facies metamorphism and dehydration partial melting of basic rocks at lower crustal depths, with garnet gran

APA, Harvard, Vancouver, ISO, and other styles

7

ROY, A. B., ALFRED KRÖNER, P. K. BHATTACHAYA, and SANJEEV RATHORE. "Metamorphic evolution and zircon geochronology of early Proterozoic granulites in the Aravalli Mountains of northwestern India." Geological Magazine 142, no. 3 (2005): 287–302. http://dx.doi.org/10.1017/s0016756805000804.

Full text

Abstract:

Granulites including a charnockite suite, mafic granulites, pelitic granulites, metanorite dykes and their retrograde varieties occur as discontinuous shear zone-bounded bodies within the Archaean basement comprising a granite gneiss–amphibolite–metasedimentary rock association in the central part of the Aravalli Mountains, northwest India. The entire suite, named the Sandmata Complex, preserves a complex history of tectonothermal evolution. Except for their strongly foliated margins, the granulite bodies are largely massive. Partial melting in the ‘country rocks’ led to the development of mig

APA, Harvard, Vancouver, ISO, and other styles

8

Kepezhinskas, Nikita. "Fluid-induced metamorphism and anatexis of refractory Ni-Co-Cu sulphides in subduction-related rocks." E3S Web of Conferences 98 (2019): 08008. http://dx.doi.org/10.1051/e3sconf/20199808008.

Full text

Abstract:

The role of metamorphism on refractory sulfides is not well constrained. Although experiments have displayed the effectiveness of high grade metamorphism, namely granulite facies metamorphism, on sulfide anatexis, its role in the presence of other variables is still poorly understood. Rocks from the Bay Islands Accretionary Complex in Honduras and the Ildeus-Lucha Complex in Russia exhibit extensive metamorphism. Sulfide mineralization is prolific in these rocks suggesting that metamorphism has played an important role in re-concentrating these sulfides during amphibolite and granulite facies

APA, Harvard, Vancouver, ISO, and other styles

9

Skublov, Sergey G., Aleksey V. Berezin, and Laysan I. Salimgaraeva. "Comment on Volodichev et al. Archean Zircons with Omphacite Inclusions from Eclogites of the Belomorian Province, Fennoscandian Shield: The First Finding. Minerals 2021, 11, 1029." Minerals 12, no. 2 (2022): 141. http://dx.doi.org/10.3390/min12020141.

Full text

Abstract:

Volodichev et al. (Volodichev et al., 2021) reported on the first finding of omphacite (23%–25% Jd) inclusions in 2.68 Ga metamorphic zircons from Gridino eclogites and presented it as evidence for Archean eclogite-facies metamorphism in the Belomorian Mobile Belt. We believe that the Archean age of the garnets referred to by the above authors was estimated incorrectly. Our interpretation is that omphacite origin is related to Archean high-pressure granulite-facies metamorphism.

APA, Harvard, Vancouver, ISO, and other styles

10

Pan, Y., M. E. Fleet, and F. J. Longstaffe. "Melt-related metasomatism in mafic granulites of the Quetico subprovince, Ontario: constraints from O-Sr-Nd isotopic and fluid inclusion data." Canadian Journal of Earth Sciences 36, no. 9 (1999): 1449–62. http://dx.doi.org/10.1139/e99-041.

Full text

Abstract:

Mafic granulites in the Archean Quetico subprovince, north of Manitouwadge, Ontario, occur as isolated lenses or discontinuous layers in spatial association with tonalitic leucosomes in metasedimentary rocks and exhibit concentric zoning from a biotite-rich margin to an orthopyroxene-rich outer zone and a clinopyroxene-rich central zone, with internal orthopyroxene-bearing leucosomes and, rarely, patches of relict amphibolites within the clinopyroxene-rich zone. Microstructural and microchemical evidence suggests that the mafic granulites formed from amphibolites by combined infiltration-diffu

APA, Harvard, Vancouver, ISO, and other styles

11

Korstgård, John A., Bo Møller Stensgaard, and Thorkild M. Rasmussen. "Magnetic anomalies and metamorphic boundaries in the southern Nagssugtoqidian orogen, West Greenland." Geological Survey of Denmark and Greenland (GEUS) Bulletin 11 (December 5, 2006): 179–84. http://dx.doi.org/10.34194/geusb.v11.4930.

Full text

Abstract:

Within the southern Nagssugtoqidian orogen in West Greenland metamorphic terrains of both Archaean and Palaeoproterozoic ages occur with metamorphic grade varying from low amphibolite facies to granulite facies. The determination of the relative ages of the different metamorphic terrains is greatly aided by the intrusion of the 2 Ga Kangâmiut dyke swarm along a NNE trend. In Archaean areas dykes cross-cut gneiss structures, and the host gneisses are in amphibolite to granulite facies. Along Itilleq strong shearing in an E–W-oriented zone caused retrogression of surrounding gneisses to low amph

APA, Harvard, Vancouver, ISO, and other styles

12

Andersen, T., H. Austrheim, and E. A. J. Burke. "Fluid inclusions in granulites and eclogites from the Bergen Arcs, Caledonides of W. Norway." Mineralogical Magazine 54, no. 375 (1990): 145–58. http://dx.doi.org/10.1180/minmag.1990.054.375.02.

Full text

Abstract:

AbstractThe Grenvillian granulite-facies complex on Holsnøy island, Bergen Arcs, W. Norway, has been metamorphosed at eclogite-facies conditions during the Caledonian orogeny (ca. 425 Ma). The granulite-eclogite facies transition takes place along shear zones and fluid pathways. Mineral thermobarometry indicates PT conditions of 800–900°C and 8–10 kbar for the Proterozoic granulite facies metamorphism and 700–800°C and 16–19 kbar for the eclogite-forming event. Quartz in the granulite facies complex contains CO2 fluid inclusions with less than 2.5 mole percent N2; the molar volumes are compati

APA, Harvard, Vancouver, ISO, and other styles

13

Li, Yunshuai, Jianxin Zhang, Shengyao Yu, et al. "Petrological, geochronological, and geochemical potential accounting for continental subduction and exhumation: A case study of felsic granulites from South Altyn Tagh, northwestern China." GSA Bulletin 132, no. 11-12 (2020): 2611–30. http://dx.doi.org/10.1130/b35459.1.

Full text

Abstract:

Abstract Deciphering the formation and geodynamic evolution of high-pressure (HP) granulites in a collisional orogeny can provide crucial constraints on the geodynamic evolution of subduction-exhumation. To fully exploit the geodynamic potential of metamorphic rocks, it is necessary to constrain the metamorphic ages, although it is difficult to link zircon and monazite ages to metamorphic evolution. A good case study for understanding these geodynamic processes is felsic granulites in the Bashiwake area, South Altyn Tagh. Petrographic observations suggest that the studied felsic granulites hav

APA, Harvard, Vancouver, ISO, and other styles

14

Janák, Marian, Tomáš Mikuš, Pavel Pitoňák, and Ján Spišiak. "Eclogites overprinted in the granulite facies from the Ďumbier Crystalline Complex (Low Tatra Mountains, Western Carpathians)." Geologica Carpathica 60, no. 3 (2009): 193–204. http://dx.doi.org/10.2478/v10096-009-0013-4.

Full text

Abstract:

Eclogites overprinted in the granulite facies from the Ďumbier Crystalline Complex (Low Tatra Mountains, Western Carpathians)Metabasites with evidence for breakdown of former eclogites and recrystallization under granulite facies conditions occur in the Ďumbier Crystalline Complex of the Low Tatra Mountains, Central Western Carpathains. Textural relationships, phase equilibrium modelling and thermobarometry have been used to determine theP-Tevolution of these rocks. Omphacite diagnostic for the eclogites facies stage is absent but its former presence is inferred from the symplectitic intergrow

APA, Harvard, Vancouver, ISO, and other styles

15

Gilotti, Jane A., and Synnøve Elvevold. "Extensional exhumation of a high-pressure granulite terrane in Payer Land, Greenland Caledonides: structural, petrologic, and geochronologic evidence from metapelites." Canadian Journal of Earth Sciences 39, no. 8 (2002): 1169–87. http://dx.doi.org/10.1139/e02-019.

Full text

Abstract:

The Payer Land gneiss complex is unique among the mostly amphibolite-facies, mid-crustal gneiss complexes in the East Greenland Caledonides due to its well-preserved, regional high-pressure (HP) granulite-facies metamorphism. High-pressure high-temperature (HPHT) assemblages are recognized in mafic, ultramafic, granitic, and metasedimentary lithologies. Anatectic metapelites contain the assemblage garnet + kyanite + K-feldspar + antiperthite (exsolved ternary feldspar) + quartz ± biotite ± rutile and record approximately the same peak metamorphic conditions (pressure (P) = 1.41.5 GPa, temp

APA, Harvard, Vancouver, ISO, and other styles

16

Cuney, Michel, and Pierre Barbey. "Uranium, rare metals, and granulite-facies metamorphism." Geoscience Frontiers 5, no. 5 (2014): 729–45. http://dx.doi.org/10.1016/j.gsf.2014.03.011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

AOKI, K., B. F. WINDLEY, S. MARUYAMA, and S. OMORI. "Metamorphic P–T conditions and retrograde path of high-pressure Barrovian metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland." Geological Magazine 151, no. 3 (2013): 559–71. http://dx.doi.org/10.1017/s0016756813000514.

Full text

Abstract:

AbstractThe metamorphic P–T conditions and associated relationships of the Barrovian zones near Glen Muick were re-examined by focusing on the petrology and thermodynamics of rocks at Cairn Leuchan, where garnetite lenses and layers occur in surrounding garnet amphibolite in the highest-grade sillimanite zone. The representative mineral assemblages in the garnet-rich lenses and garnet amphibolite are garnet + quartz + clinopyroxene + plagioclase + amphibole ± epidote, and garnet + amphibole + quartz + plagioclase ± clinopyroxene ± epidote, respectively. The chemical compositions of constituent

APA, Harvard, Vancouver, ISO, and other styles

18

Kong, Xu, Xueyuan Qi, Wentian Mi, and Xiaoxin Dong. "Zircon U–Pb Dating and Lu-Hf Isotope of the Retrograded Eclogite from Chicheng, Northern Hebei Province, China." Shock and Vibration 2021 (June 16, 2021): 1–11. http://dx.doi.org/10.1155/2021/1445653.

Full text

Abstract:

We report zircon U–Pb ages and Lu-Hf isotopic data from two sample of the retrograded eclogite in the Chicheng area. Two groups of the metamorphic zircons from the Chicheng retrograded eclogite were identified: group one shows characteristics of depletion in LREE and flat in HREE curves and exhibit no significant Eu anomaly, and this may imply that they may form under eclogite facies metamorphic condition; group two is rich in HREE and shows slight negative Eu anomaly indicated that they may form under amphibolite facies metamorphic condition. Zircon Lu-Hf isotopic of εHf from the Chicheng ecl

APA, Harvard, Vancouver, ISO, and other styles

19

Pan, Yuanming, Michael E. Fleet, and Howard R. Williams. "Granulite-facies metamorphism in the Quetico Subprovince, north of Manitouwadge, Ontario." Canadian Journal of Earth Sciences 31, no. 9 (1994): 1427–39. http://dx.doi.org/10.1139/e94-126.

Full text

Abstract:

A zone of granulites, defined by an orthopyroxene-in isograd and extending more than 100 km in length and about 10 km in width, occurs near the southern margin of the Quetico Subprovince, north of Manitouwadge, Ontario. Mineral assemblages in metasedimentary rocks and associated migmatites consist of quartz, plagioclase, garnet, orthopyroxene, biotite, cordierite, sillimanite, K-feldspar, hercynite, magnetite, ilmenite, and other accessory phases. Minor mafic gneisses and calc-silicate pods or lenses are also present. From equilibrium phase relations and thermobarometry, the granulites experie

APA, Harvard, Vancouver, ISO, and other styles

20

MAPEO, R. B. M., R. A. ARMSTRONG, and A. B. KAMPUNZU. "SHRIMP U–Pb zircon geochronology of gneisses from the Gweta borehole, northeast Botswana: implications for the Palaeoproterozoic Magondi Belt in southern Africa." Geological Magazine 138, no. 3 (2001): 299–308. http://dx.doi.org/10.1017/s001675680100526x.

Full text

Abstract:

This paper presents new U–Pb zircon analyses from garnet–sillimanite paragneisses from the Gweta borehole in northeast Botswana. Concordant to near-concordant analyses of zircon from these rocks reveal a billion year history from 3015 ± 21 Ma for the oldest detrital grain measured, to the age of high-grade metamorphism, 2027 ± 8 Ma. The maximum age of sedimentation in the Magondi belt is constrained by the age of the youngest concordant detrital zircon at 2125 ± 6 Ma. This contrasts with the age of sedimentation in the Central Zone of the Limpopo belt which is Archaean. The comparison of our r

APA, Harvard, Vancouver, ISO, and other styles

21

Tettelaar, Tanya, and Aphrodite Indares. "Granulite-facies regional and contact metamorphism of the Tasiuyak paragneiss, northern Labrador: textural evolution and interpretation." Canadian Journal of Earth Sciences 44, no. 10 (2007): 1413–37. http://dx.doi.org/10.1139/e07-029.

Full text

Abstract:

The Tasiuyak paragneiss at the western margin of the Nain Plutonic Suite has been subjected to two granulite-facies metamorphic events: (i) regional metamorphism during the Paleoproterozoic Torngat orogeny, and (ii) contact metamorphism due to emplacement of the Mesoproterozoic Nain Plutonic Suite. Regional metamorphism led to partial melting of pelitic rocks and the development of a locally well-preserved sequence of prograde and retrograde textures. These textures are partly controlled by bulk composition and formed in the pressure–temperature (P–T) field of the continuous reaction: biotite

APA, Harvard, Vancouver, ISO, and other styles

22

Lasalle, Stephanie, Greg Dunning, and Aphrodite Indares. "In situ LA–ICP–MS dating of monazite from aluminous gneisses: insights on the tectono-metamorphic history of a granulite-facies domain in the central Grenville Province." Canadian Journal of Earth Sciences 51, no. 6 (2014): 558–72. http://dx.doi.org/10.1139/cjes-2013-0170.

Full text

Abstract:

In situ U–Pb dating of monazite from granulite-facies anatectic aluminous gneisses of the hinterland of the Grenville Province (Manicouagan area) is used to constrain the age of metamorphic events. Matrix grains in these rocks show complex internal textures consistent with extensive corrosion and overgrowths which are attributed to partial dissolution of earlier monazite in anatectic melt followed by new growth during melt crystallization or subsequent fluid infiltration. The new monazite data show the following: (i) inherited “pre-Grevillian” ages up to ca. 1400 Ma in some rocks; (ii) “main G

APA, Harvard, Vancouver, ISO, and other styles

23

Samuel, Vinod O., Daniel E. Harlov, Sanghoon Kwon, and K. Sajeev. "Silicate, Oxide and Sulphide Trends in Neo-Archean Rocks from the Nilgiri Block, Southern India: the Role of Fluids During High-grade Metamorphism." Journal of Petrology 60, no. 5 (2019): 1027–62. http://dx.doi.org/10.1093/petrology/egz023.

Full text

Abstract:

Abstract The Nilgiri Block, southern India represents an exhumed section of lower, late Archean (2500 Ma) crust. The northern highlands of the Nilgiri Block are characterized by metagabbros with pyroxenite inlayers. A two-pyroxene granulite zone acts as a transition between the metagabbros and charnockites, which are exposed in the central and southern part of the Nilgiri highlands. Thermobarometry results indicate a SW–NE regional trend both in temperature (∼650–800°C) and in pressure (700–1100 MPa) over the Nilgiri highlands. In the charnockites, composite rutile–ilmenite grains are the domi

APA, Harvard, Vancouver, ISO, and other styles

24

de Maesschalck, A. A., and I. S. Oen. "Fluid and mineral inclusions in corundum from gem gravels in Sri Lanka." Mineralogical Magazine 53, no. 373 (1989): 539–45. http://dx.doi.org/10.1180/minmag.1989.053.373.04.

Full text

Abstract:

AbstractMineral and fluid inclusions were studied in seven gem corundums from gravels of three areas in Sri Lanka. All fluid inclusions are pure CO2. Microthermometry results on primary fluid inclusions suggest formation of corundum under granulite facies metamorphism (>630°C, 5.5 kbar). Secondary fluid inclusions indicate different retrograde events of post-metamorphic cooling and uplift for different source areas.

APA, Harvard, Vancouver, ISO, and other styles

25

Downes, P. J., and A. W. R. Bevan. "Chrysoberyl, beryl and zincian spinel mineralization in granulite-facies Archaean rocks at Dowerin, Western Australia." Mineralogical Magazine 66, no. 6 (2002): 985–1002. http://dx.doi.org/10.1180/0026461026660072.

Full text

Abstract:

Abstract A deposit of chrysoberyl (BeAl2O4), including the variety alexandrite, occurs near Dowerin, in the southwestern region of the Archaean Yilgarn Craton, Western Australia. The deposit is situated in the northern part of the Lake Grace Terrain, a crustal component of the southwestern Yilgarn Craton, in granulite-facies gneisses (2640–2649 Ma; T = 700°C, P <6 kbar) adjacent to the margin of the Kellerberrin Batholith (2587±25 Ma). Beryllium mineralization at Dowerin occurs in plagioclase-quartz-biotite-garnet gneiss and cross-cutting tourmaline-plagioclase veins situated adjacent to le

APA, Harvard, Vancouver, ISO, and other styles

26

Förster, H. J., and D. E. Harlov. "Monazite-(Ce)-huttonite solid solutions in granulite-facies metabasites from the Ivrea-Verbano Zone, Italy." Mineralogical Magazine 63, no. 4 (1999): 587–94. http://dx.doi.org/10.1180/minmag.1999.063.4.11.

Full text

Abstract:

AbstractComposite populations of monazite-group minerals of both metamorphic and metasomatic origin have been discovered in thin layers of granulite-facies metabasites interlayered with metapelites, located in the Val Strona di Omegna region of the Ivrea-Verbano Zone, Italy. In addition to monazite-(Ce), which is uncommonly poor in Th and is probably formed by incongruent dissolution of apatite, these populations include members of the monazite-huttonite series. The latter minerals contain between 13 and 30.1 mol.% ThSiO4 [= huttonitic monazite-(Ce)], and are known from only half a dozen other

APA, Harvard, Vancouver, ISO, and other styles

27

Peck, William H., Michael T. DeAngelis, Michael T. Meredith, and Etienne Morin. "Polymetamorphism of marbles in the Morin terrane, Grenville Province, Quebec." Canadian Journal of Earth Sciences 42, no. 10 (2005): 1949–65. http://dx.doi.org/10.1139/e05-070.

Full text

Abstract:

The Morin terrane (Grenville Province, Quebec) is dominated by the 1.15 Ga Morin Anorthosite Massif and related granitic intrusions, all of which exhibit granulite-facies mineral assemblages. Anorthosite-suite rocks are deformed both in shear zones and in the interior of the terrane and show intrusive contact relations with marble along road cuts near the village of St. Jovite. Intrusive rocks exposed in these road cuts have well-developed skarns, which were deformed with the intrusions after emplacement. Skarn minerals are consumed by garnet-forming reactions (e.g., An + Wo = Gr + Qtz) that p

APA, Harvard, Vancouver, ISO, and other styles

28

Bose, Sankar, Kaushik Das, Junji Torimoto, and Daniel Dunkley. "Origin of orthopyroxene-bearing felsic gneiss from the perspective of ultrahigh-temperature metamorphism: an example from the Chilka Lake migmatite complex, Eastern Ghats Belt, India." Mineralogical Magazine 84, no. 5 (2020): 712–37. http://dx.doi.org/10.1180/mgm.2020.71.

Full text

Abstract:

AbstractOrthopyroxene-bearing felsic gneiss occurs as foliation-parallel layers and bands together with aluminous granulite, mafic granulite, and quartzofeldspathic granulite in the Chilka Lake migmatite complex of the Proterozoic Eastern Ghats Belt, India. The rock was classified previously as charnockite which underwent granulite-facies metamorphism. Field and textural features of this rock show evidence of the partial melting of a biotite-bearing greywacke protolith. Orthopyroxene with/without garnet and cordierite were produced with K-feldspar as peritectic phases of incongruent melting of

APA, Harvard, Vancouver, ISO, and other styles

29

Couëslan, Chris G., and David R. M. Pattison. "Low-pressure regional amphibolite-facies to granulite-facies metamorphism of the Paleoproterozoic Thompson Nickel Belt, Manitoba." Canadian Journal of Earth Sciences 49, no. 10 (2012): 1117–53. http://dx.doi.org/10.1139/e2012-029.

Full text

Abstract:

The Thompson Nickel Belt is a ca. 35 km × 400 km northeast-trending segment of the northwest margin of the Archean Superior craton in Manitoba, bounded to the west by the Paleoproterozoic Reindeer Zone. The belt was metamorphosed and deformed during the Trans-Hudson orogeny (ca. 1.9–1.7 Ga). Mineral assemblages in metamorphosed pelite, aluminous greywacke, mafic igneous rock, iron formation, and ferruginous wacke define regional metamorphic domains, separated by mineral isograds, that are subparallel to the strike of the belt and to regional-scale D3 structures. An elongate, ca. 5 km × 73 km,

APA, Harvard, Vancouver, ISO, and other styles

30

Aoki, K., B. F. Windley, S. Maruyama, and S. Omori. "Discussion of ‘Metamorphic P–T and retrograde path of high-pressure Barrovian metamorphic zones near Cairn Leuchan, Caledonian orogen, Scotland’." Geological Magazine 151, no. 4 (2014): 758–63. http://dx.doi.org/10.1017/s0016756813001106.

Full text

Abstract:

K. Aoki, B. F. Windley, S. Maruyama & S. Omori reply: First, we thank Viete, Oliver & Wilde for their interesting and thought-provoking comments on the timing of the high-pressure granulite facies (HGR) metamorphism recorded in metamorphic rocks at Cairn Leuchan, Scotland, published by Aoki et al. (2013). Based on new metamorphic data of garnetites and garnet-amphibolites at Cairn Leuchan and new zircon U–Pb ages of amphibolitized eclogite at Tomatin, we suggested in our publication that the HGR metamorphism was retrograde after eclogite facies before the c. 470 Ma ‘Barrovian metamorph

APA, Harvard, Vancouver, ISO, and other styles

31

BRÖCKER, MICHAEL, REINER KLEMD, ELLEN KOOIJMAN, JASPER BERNDT, and ALEXANDER LARIONOV. "Zircon geochronology and trace element characteristics of eclogites and granulites from the Orlica-Śnieżnik complex, Bohemian Massif." Geological Magazine 147, no. 3 (2009): 339–62. http://dx.doi.org/10.1017/s0016756809990665.

Full text

Abstract:

AbstractU–Pb zircon geochronology and trace element analysis was applied to eclogites and (ultra)high-pressure granulites that occur as volumetrically subordinate rock bodies within orthogneisses of the Orlica-Śnieżnik complex, Bohemian Massif. Under favourable circumstances such data may help to unravel protolith ages and yet-undetermined aspects of the metamorphic evolution, for example, the time span over which eclogite-facies conditions were attained. By means of ion-probe and laser ablation techniques, a comprehensive database was compiled for samples collected from prominent eclogite and

APA, Harvard, Vancouver, ISO, and other styles

32

Li, Shan-Shan, Richard M. Palin, M. Santosh, E. Shaji, and T. Tsunogae. "Extreme thermal metamorphism associated with Gondwana assembly: Evidence from sapphirine-bearing granulites of Rajapalayam, southern India." GSA Bulletin 132, no. 5-6 (2019): 1013–30. http://dx.doi.org/10.1130/b35378.1.

Full text

Abstract:

Abstract The Madurai block is the largest composite crustal block in the Southern Granulite terrane of India, where granulite-facies rocks metamorphosed at ultrahigh-temperature (UHT) conditions occur in several localities. Here, we investigated UHT rocks from Rajapalayam, in the southern domain of the Southern Granulite terrane, using integrated thermobarometry and in situ monazite geochronology to precisely constrain the nature and timing of this extreme metamorphism and its implications for regional tectonics. Conventional thermobarometry and petrological phase equilibrium modeling reveal p

APA, Harvard, Vancouver, ISO, and other styles

33

NEWTON, R. C. "Charnockitic alteration: evidence for CO2infiltration in granulite facies metamorphism." Journal of Metamorphic Geology 10, no. 3 (1992): 383–400. http://dx.doi.org/10.1111/j.1525-1314.1992.tb00091.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Tholt, Andrew, Sean R. Mulcahy, William C. McClelland, et al. "Metamorphism of the Sierra de Maz and implications for the tectonic evolution of the MARA terrane." Geosphere 17, no. 6 (2021): 1786–806. http://dx.doi.org/10.1130/ges02268.1.

Full text

Abstract:

Abstract The Mesoproterozoic MARA terrane of western South America is a composite igneous-metamorphic complex that is important for Paleozoic paleogeographic reconstructions and the relative positions of Laurentia and Gondwana. The magmatic and detrital records of the MARA terrane are consistent with a Laurentian origin; however, the metamorphic and deformation records lack sufficient detail to constrain the correlation of units within the MARA terrane and the timing and mechanisms of accretion to the Gondwana margin. Combined regional mapping, metamorphic petrology, and garnet and monazite ge

APA, Harvard, Vancouver, ISO, and other styles

35

Morel, S. W. "Petrology and geothermometry of the Little Michiru Complex, Malawi." Mineralogical Magazine 53, no. 371 (1989): 285–91. http://dx.doi.org/10.1180/minmag.1989.053.371.02.

Full text

Abstract:

AbstractThe Little Michiru complex is a composite intrusion of pyroxenite and pyroxene syenite which is located at the boundary between amphibolite and granulite facies gneisses in the Shire rift valley. Pyroxene and feldspar chemistry shows that the intrusion consolidated from two magmatic fractions, one a pyroxenite cumulate that equilibrated at 870–1000 °C, the other a partly anatectic pyroxene syenite magma which metasomatized the surrounding gneisses during granulite-facies metamorphism and equilibrated at a temperature of 730–830 °C at 7 kbar.

APA, Harvard, Vancouver, ISO, and other styles

36

Owen, J. V., and J. D. Greenough. "Petrology of the Cormacks Lake Complex, Newfoundland: decompressional reaction relations in cordierite+orthoamphibole-bearing gneisses and associated rocks." Mineralogical Magazine 64, no. 4 (2000): 711–24. http://dx.doi.org/10.1180/002646100549562.

Full text

Abstract:

AbstractCordierite+orthoamphibole (Crd+Oam)-bearing gneisses in the Cormacks Lake complex are regionally associated with metapelites containing prismatic sillimanite and K-feldspar, metabasites that locally contain metamorphic orthopyroxene, and other high-grade rocks in the Central Gneiss (Dashwoods) subzone, in the southwestern Newfoundland Appalachians. Retrograde features formed at the expense of the granulite-facies assemblages are ubiquitous. For example, in some migmatitic rocks, garnet is resorbed by Crd+Oam, and in metapelites, cordierite separates corroded garnet and sillimanite. Min

APA, Harvard, Vancouver, ISO, and other styles

37

Krogh, T. E., and D. E. Moser. "U–Pb zircon and monazite ages from the Kapuskasing uplift: age constraints on deformation within the Ivanhoe Lake fault zone." Canadian Journal of Earth Sciences 31, no. 7 (1994): 1096–103. http://dx.doi.org/10.1139/e94-098.

Full text

Abstract:

A decade of U–Pb dating of zircon and monazite from high-grade metamorphic rocks in the Kapuskasing uplift has identified a series of magmatic and metamorphic events between 2700 and 2585 Ma, and indicates that the onset of regional granulite metamorphism took place at mid-crustal levels of the southern Superior craton ca. 2660 Ma. New U–Pb ages for zircon and monazite have been used to constrain the age of ductile deformation fabrics at two sites in the Ivanhoe Lake fault zone, the structure along which the granulite-facies Kapuskasing structural zone was uplifted. These results suggest that

APA, Harvard, Vancouver, ISO, and other styles

38

Mills, A. J., R. G. Berman, W. J. Davis, et al. "Thermobarometry and geochronology of the Uvauk complex, a polymetamorphic Neoarchean and Paleoproterozoic segment of the Snowbird tectonic zone, Nunavut, Canada." Canadian Journal of Earth Sciences 44, no. 2 (2007): 245–66. http://dx.doi.org/10.1139/e06-080.

Full text

Abstract:

The Uvauk complex is an ultramylonite-bounded, granulite-facies suite of anorthosite–gabbro that forms part of the Chesterfield Inlet segment of the Snowbird tectonic zone. Following initial anorthosite–gabbro magmatism at ca. 2.71 Ga and a cryptic 2.62–2.60 Ga event marked by zircon and monazite growth, the Uvauk complex experienced two high-grade tectonometamorphic events at 2.56–2.50 and 1.91–1.90 Ga. Similar to the 2.56–2.50 Ga development of other shear zones in the region, the upper-amphibolite-facies to granulite-facies, moderately high-pressure (8.4–11.0 kbar and 705–760 °C) (1 kbar =

APA, Harvard, Vancouver, ISO, and other styles

39

Zheng, Yong-Fei, and Ren-Xu Chen. "Extreme metamorphism and metamorphic facies series at convergent plate boundaries: Implications for supercontinent dynamics." Geosphere 17, no. 6 (2021): 1647–85. http://dx.doi.org/10.1130/ges02334.1.

Full text

Abstract:

Abstract Crustal metamorphism under extreme pressure-temperature conditions produces characteristic ultrahigh-pressure (UHP) and ultrahigh-temperature (UHT) mineral assemblages at convergent plate boundaries. The formation and evolution of these assemblages have important implications, not only for the generation and differentiation of continental crust through the operation of plate tectonics, but also for mountain building along both converging and converged plate boundaries. In principle, extreme metamorphic products can be linked to their lower-grade counterparts in the same metamorphic fa

APA, Harvard, Vancouver, ISO, and other styles

40

Stephens, Michael B., and Carl-Henric Wahlgren. "Chapter 15 Polyphase (1.9–1.8, 1.5–1.4 and 1.0–0.9 Ga) deformation and metamorphism of Proterozoic (1.9–1.2 Ga) continental crust, Eastern Segment, Sveconorwegian orogen." Geological Society, London, Memoirs 50, no. 1 (2020): 351–96. http://dx.doi.org/10.1144/m50-2018-57.

Full text

Abstract:

AbstractThe Eastern Segment in the Sveconorwegian orogen comprises Paleoproterozoic–Mesoproterozoic magmatic suites, which formed along an active continental margin, and Mesoproterozoic suites emplaced during intracratonic extension. Zn–Pb sulphide and Fe oxide mineralizations in 1.9 Ga metavolcanic rocks form a significant mineral resource cluster in the northeastern part. Deformation and metamorphism under low-pressure (≤5 kbar) and variable-temperature conditions, including anatexis and granulite facies, prevailed during 1.9–1.8 Ga (Svecokarelian) and 1.5–1.4 Ga (Hallandian) accretionary or

APA, Harvard, Vancouver, ISO, and other styles

41

Gintov, O. B. "What happened to the Early Precambrian granulite complexes of the Bug region (Ukrainian shield) and the Limpopo belt (South Africa) and how to stratify them? A tectonist’s view." Geofizicheskiy Zhurnal 44, no. 1 (2022): 55–82. http://dx.doi.org/10.24028/gzh.v44i1.253711.

Full text

Abstract:

The author reviews two alternative approaches (stratigenic-metamorphogenic and deformation-metamorphogenic) to the geology and mapping of the Earth’s oldest crust rocks that were metamorphized in РТ-conditions of the granulite facies, on the examples of two granulite belts — the Bug area complex (Ukrainian shield) and Limpopo belt (Southern Africa). There was shown a fairly good correlation of the composition and metamorphism (including the dynamometamorphism) of the rock complexes of both belts and their at least three-stage origin and transformation. The granulitic metamorphism process

APA, Harvard, Vancouver, ISO, and other styles

42

SEARLE, MICHAEL P., and JON COX. "Subduction zone metamorphism during formation and emplacement of the Semail ophiolite in the Oman Mountains." Geological Magazine 139, no. 3 (2002): 241–55. http://dx.doi.org/10.1017/s0016756802006532.

Full text

Abstract:

The metamorphic sole along the base of the Semail ophiolite in Oman records the earliest thrust slice subducted and accreted to the base of the ophiolite mantle sequence. In the Bani Hamid area (United Arab Emirates) a c. 870 m thick thrust slice of granulite facies rocks includes garnet+ diopside amphibolites, enstatite+cordierite+sillimanite+spinel±sapphirine quartzites, alkaline mafic granulites (meta-jacupirangites) quartzo-feldspathic gneisses and calc-silicates. The latter contain garnet+diopside+scapolite+plagioclase±wollastonite. P–T conditions of granulite facies metamorphism are in t

APA, Harvard, Vancouver, ISO, and other styles

43

Bogomolov, A. H., and Sv A. Sidorenko. "PECULIAVITIES OF TRANSFORMATION OF ORGANIC MATTERIN CARBONACEOUS ROCKS OF THE UKRAINIAN CRYSTAL SHILD." Moscow University Bulletin. Series 4. Geology, no. 1 (February 28, 2018): 44–53. http://dx.doi.org/10.33623/0579-9406-2018-1-44-53.

Full text

Abstract:

The main features of the transformation of organic matter (OM) of three facies of metamorphism (the facies of green shales, amphibolite and granulite facies) on the example of the Ukrainian crystal shield are discussed. The area of distribution and content of OM in high-carbon ancient rocks is characterized, the composition of primary sedimentary rocks, the processes of accumulation of biophilic elements during the transformation of OM are reconstructed.

APA, Harvard, Vancouver, ISO, and other styles

44

Wu, Hailin, Wenbin Zhu, and Rongfeng Ge. "Late Paleoproterozoic granulite-facies metamorphism in the North Altyn Tagh area, southeastern Tarim craton: Pressure-temperature paths, zircon U-Pb ages, and tectonic implications." GSA Bulletin 131, no. 9-10 (2019): 1591–606. http://dx.doi.org/10.1130/b35085.1.

Full text

Abstract:

Abstract Granulite occupies the root of orogenic belts, and understanding its formation and evolution may provide critical information on orogenic processes. Previous studies have mainly focused on garnet-bearing high-pressure and medium-pressure granulites, whereas the metamorphic evolution and pressure-temperature (P-T) paths of garnet-absent, low-pressure granulites are more difficult to constrain. Here, we present zircon U-Pb ages and mineral chemistry for a suite of newly discovered two-pyroxene granulites in the North Altyn Tagh area, southeastern Tarim craton, northwestern China. Conven

APA, Harvard, Vancouver, ISO, and other styles

45

McLelland, James M. "Pre-granulite-facies metamorphism in the Adirondack Mountains, New York." Geological Society, London, Special Publications 43, no. 1 (1989): 315–17. http://dx.doi.org/10.1144/gsl.sp.1989.043.01.24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Schulmann, Karel, and Richard W. White. "Granulite facies metamorphism and the rheology of the lower crust." Lithos 124, no. 1-2 (2011): vii—ix. http://dx.doi.org/10.1016/j.lithos.2011.01.009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Collerson, Kenneth D., Malcolm T. McCulloch, and Allan P. Nutman. "Sr and Nd isotope systematics of polymetamorphic Archean gneisses from southern West Greenland and northern Labrador." Canadian Journal of Earth Sciences 26, no. 3 (1989): 446–66. http://dx.doi.org/10.1139/e89-039.

Full text

Abstract:

Sr and Nd isotopic data for middle to late Archean polymetamorphic felsic gneisses from localities in the Nuuk area, West Greenland, are compared and contrasted with new isotopic results for early Archean Amîtsoq gneisses and with data for isotopically reworked Kiyuktok gneisses from the Saglek area, Labrador. Sr isotopic data for individual suites of felsic gneisses record the time-integrated effect of variable Rb–Sr fractionation during prograde and retrograde events as well as the effect of source inhomogeneity.Contrasting petrologic and Sr–Nd isotopic characteristics are the result of diff

APA, Harvard, Vancouver, ISO, and other styles

48

ENGVIK, A. K., and S. ELVEVOLD. "Pan-African extension and near-isothermal exhumation of a granulite facies terrain, Dronning Maud Land, Antarctica." Geological Magazine 141, no. 6 (2004): 649–60. http://dx.doi.org/10.1017/s0016756804009859.

Full text

Abstract:

The Mühlig-Hofmann- and Filchnerfjella in central Dronning Maud Land, Antarctica, consist of series of granitoid igneous rocks emplaced in granulite and upper amphibolite facies metamorphic rocks. The area has experienced high-temperature metamorphism followed by near-isothermal decompression, partial crustal melting, voluminous magmatism and extensional exhumation during the later phase of the late Neoproterozoic to Cambrian Pan-African event. Remnants of kyanite–garnet–ferritschermakite–rutile assemblages indicate an early higher-pressure metamorphism and crustal overthickening. The gneisses

APA, Harvard, Vancouver, ISO, and other styles

49

Carson, C. J., M. Hand, and P. H. G. M. Dirks. "Stable coexistence of grandidierite and kornerupine during medium pressure granulite facies metamorphism." Mineralogical Magazine 59, no. 395 (1995): 327–39. http://dx.doi.org/10.1180/minmag.1995.059.395.16.

Full text

Abstract:

AbstractPetrological and mineral chemical data are presented for two new occurrences of co-existing borosilicate minerals in the Larsemann Hills, East Antarctica. The assemblages contain kornerupine and the rare borosilicate, grandidierite (Mg,Fe)A13BSiO9. Two distinct associations occur: (1) At McCarthy Point, 1–10 mm thick tourmaline-kornerupine-grandidierite layers are hosted within quartzofeldspathic gneiss; and (2) Seal Cove, where coexisting kornerupine and grandidierite occur within coarse-grained, metamorphic segregations with Mg-rich cores of cordierite-garnet-spinel-biotite-ilmenite

APA, Harvard, Vancouver, ISO, and other styles

50

Kyrylyuk, V. P., and O. V. Gaiovskyi. "REGIONAL METAMORPHISM AND STRATIGRAPHY OF THE BASEMENT OF UKRAINIAN SHIELD." Geological Journal, no. 4 (December 28, 2022): 3–30. http://dx.doi.org/10.30836/igs.1025-6814.2022.4.261979.

Full text

Abstract:

Stratigraphic complexes of the Lower Precambrian are everywhere metamorphosed. That is why the stratigraphic dismemberment of the Lower Precambrian has always been inextricably linked with the study of metamorphism. For some time, metamorphism was even used as a sign of the relative age of stratigenic metamorphic complexes according to the principle – “the higher the degree of metamorphism, the older the complex”. The high-temperature complexes of granulite and amphibolite facies belonged to the Archean, while the less metamorphosed complexes belonged to the Proterozoic. But already at the beg

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!