Petrologic and geochemical links between the post-collisional Proterozoic Harney Peak leucogranite, South Dakota, USA, and its source rocks

Nábělek, Peter I.; Bartlett, Cindy D.

doi:10.1016/s0024-4937(98)00026-7

Cited by 53 publications

(37 citation statements)

References 38 publications

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“…7) can suggest that plagioclase, biotite, garnet, and alkali feldspar fractionated during crystal fractionation or represent residual phases. Using major element least-square modeling (e.g., Chayes 1968;Bryan et al 1969;Albarède and Provost 1977;Nabelek and Bartlett 1998;Ortega Cuesta 1998;Villaseca et al 1999) and the mineralogical composition of the residue as inferred from the geochemistry, different combinations of protoliths and residuum were modeled. The composition of the residual minerals was constrained using migmatitic pelites and orthogneisses of the Tormes Dome (Gil Ibarguchi and Martinez 1982;Escuder Viruete 1999;Escuder Viruete et al 2000), experimental work involving augen gneisses (Holtz and Johannes 1991;Castro et al 2000), and metapelites/metagreywackes (Vielzeuf and Holloway 1988;Le Breton and Thompson 1988;Patiño Douce et al 1993;Patiño Douce and Beard 1996;Montel and Vielzeuf 1997;Patiño Douce and Harris 1998;Pickering and Johnston 1998).…”

Section: Discussionmentioning

confidence: 99%

“…In this sense, the calculated melt fractions obtained in mass-balance modeling represent maximum values as they are not controlled by the contribution of water in consumed mica. Furthermore, metastable muscovite in experiments may lower the proportion of melt (Patiño Douce and Harris 1998;Nabelek and Bartlett 1998).…”

Section: Partial Melting and Crystal Fractionationmentioning

confidence: 99%

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Generation and emplacement of shear-related highly mobile crustal melts: the synkinematic leucogranites from the Variscan Tormes Dome, Western Spain

Moro

Plaza

Romer

2011

Int J Earth Sci (Geol Rundsch)

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The Tormes dome consists of S-type granites that intruded into Ordovician augen gneisses and Neoproterozoic-Lower Cambrian metapelites/metagreywackes at different extents of migmatization. S-type granites are mainly equigranular two-mica granites, occurring as: (1) enclave-laden subvertical feeder dykes, (2) small external sill-like bodies with size and shape relations indicative for self-similar pluton growth, and (3) as large pluton bodies, emplaced at higher levels than the external ones. These magmas were highly mobile as it is inferred from the high contents of fluxing components, the disintegration and alignment of pelitic xenoliths in feeder dykes and at the bottom of some sill-like bodies. Field relations relate this 311 Ma magmatism (U-Pb monazite) to the regional shearing of the D 3 Variscan event. Partial melting modeling and the relatively high estimated liquidus temperatures indicate biotite-dehydration partial melting (800-840°C and 400-650 MPa) rather than water-fluxed melting, implying that there was no partial melting triggered by externally derived fluids in the shear zones. Instead, the subvertical shear zones favored extraction of melts that formed during the regional migmatization event around 320 Ma. Nd isotope variation among the granites might reflect disequilibrium partial melting or different protoliths. Mass-balance and trace element partial melting modeling strongly suggest two kinds of fertile crustal protoliths: augen gneisses and metapelites. Slight compositional variation among the leucogranites does not reflect different extent of protolith melting but is related to a small amount of fractional crystallization (\13% for the equigranular granites), which is generally more pronounced in shallower batholitic leucogranites than in the small and homogeneous sill-like bodies. The lower extent of fractional crystallization and the higher-pressure emplacement conditions of the sill-like bodies support a more restricted movement through the crust than for batholitic leucogranites.

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Section: Discussionmentioning

confidence: 99%

Section: Partial Melting and Crystal Fractionationmentioning

confidence: 99%

Generation and emplacement of shear-related highly mobile crustal melts: the synkinematic leucogranites from the Variscan Tormes Dome, Western Spain

Moro

Plaza

Romer

2011

Int J Earth Sci (Geol Rundsch)

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“…[1,2]). There is general agreement that highly differentiated leucogranitic magmas (leucogranites) could be mostly related to anatectic products of metapelitic crustal sources [3][4][5] although the heat sources for their production have remained controversial [6]. Associated intermediate to basic plutonic rocks are typically lacking.…”

Section: Introductionmentioning

confidence: 99%

Geochemistry of Ferriferous, High-K Calc-Alkaline Granitoids from the Banefo-Mvoutsaha Massif (NE Bafoussam), Central Domain of the Pan- African Fold Belt, Cameroon~!2009-11-12~!2010-01-05~!2010-03-11~!

Nono¹,

Nzenti²,

Suh³

et al. 2010

TOGEOJ

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Abstract:The ferriferous high-K calc-alkaline rocks of the Banefo-Mvoutsaha Massif, Pan-African Belt, Central Cameroon, were synkinematically emplaced in a sinistral strike-slip shear zone of Pan-African age. The rock sequences consist of orthogneises made of coarse-grained granites, quartz-monzonites, and medium-to fine-grained granodiorites, ranging from ca. 55 to 75 wt.-% SiO 2 . They display characteristics of shoshonitic and high-K calc-alkaline series. Orthogneises are metaluminous to peraluminous and show characteristics of I-type granitoids from a ferriferous series. Trace element distribution patterns reveal rocks enriched in LILE when compared to HSFE and distinctively depleted in Th, Nb, Ba, Sr, Ti and Ta. The data indicate that this granitic rock assemblage did not result from the simple differentiation of a common parental magma, but show that Banefo-Mvoutsaha plutonic rocks were derived from different crustal protoliths. Major and trace element composition are consistent with the magmatism which may have involved remelting of (1) a composite metagreywackes protolith in the upper crust and (2) amphibolitised high-K calc-alkaline basaltic andesites in the central domain of the PANEFB (Pan-African North Equatorial Fold Belt). The plutonic rocks of Banefo-Mvoutsaha area resemble other Neoproterozoic high-K calc-alkaline syntectonic plutons in Western Cameroon. They also display strong similarities with high-K calc-alkaline plutons of the Pernambuco shear zone in NE Brazil and Eastern Nigeria.

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“…Large-ion lithophile elements such as Rb, Sr, Ba and Cs and their ratios, as well as the REE, are commonly used as monitors of magmatic differentiation (e.g., Halliday et al, 1991;Morteani et al, 1995;Icenhower and London, 1996;Nabelek and Bartlett, 1998;Nabelek, 1999;Jung et al, 2000;Dahlquist et al, 2007). Therefore, we have applied a fractional crystallization model to investigate the behavior of Rb, Sr, Ba and also the REE during this process in the Huaco granite pluton.…”

Section: Discussionmentioning

confidence: 99%

Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina

Sardi

Grosse

Murata

et al. 2018

andgeo

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ABSTRACT. The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal relations, textures and compositions. The dominant facies (Regional Porphyritic Granite; RPG) is a porphyritic two-mica monzo-to syenogranite, with abundant microcline megacrysts up to 12 cm in size. It was emplaced in a dominant extensional setting and has a mainly crustal source but with participation of a mantle-derived component. The RPG transitions towards two coeval and co-genetic granite facies, at its margins (Border Granite; BG) and around Be-pegmatites (Adjacent Porphyritic Granite; APG). These two facies have a finer-grained texture and smaller and less abundant megacrysts. They are also monzo-to syenogranites, but a slight decrease in the biotite/muscovite ratio is observed from the BG to the RPG to the APG. Trace element modeling suggests that the RPG, BG and APG differentiated from the same magma source by fractional crystallization. Temporally older mafic (ME) and felsic (FE) enclaves are common in the pluton. The ME can be considered partially assimilated remnants of a mafic component in the genesis of the RPG, whereas the FE seem to be remnants of premature aplites. Other subordinate rocks intrude the RPG and are, hence, temporally younger: felsic dikes (FD), dioritic dikes (DD) and equiganular granites (EqG) are clearly posterior, whereas coeval-to-late Be-pegmatites (BeP) and orbicular granites (OG) formed during the final stages of crystallization of the pluton. The BeP, OG and FD indicate the presence of abundant water and volatiles. The EqG form small stocks that intrude the RPG and were possibly originated from purely crustal sources. The DD probably correspond to a younger unrelated episode of mafic magmatism. Keywords: Granitic facies, REE and LIL composition,Fractional crystallization model, Huaco granite, Velasco range, Sierras Pampeanas.RESUMEN. Estructura interna y geoquímica del plutón granítico carbonífero de Huaco, Sierra de Velasco, NW de Argentina. El Plutón Huaco, ubicado en la sierra de Velasco (en Sierras Pampeanas del noroeste de Argentina), es de afinidad granítica A y está conformado por tres facies graníticas y contiene varias rocas ígneas subordinadas, las que muestran diferentes relaciones temporales, texturas y composiciones. La facies granítica dominante (Granito Porfírico Regional; RPG) es un monzo-sienogranito de dos micas, de textura porfírica con abundantes megacristales de microclino que pueden alcanzar hasta 12 cm de longitud. Ha sido emplazado en un marco tectónico dominantemente extensional y habría tenido una fuente de origen cortical pero también con participación de componentes mantélicos. En los bordes del Plutón Huaco y envolviendo a pegmatitas de berilo contenidas en el mismo (BeP), se reconocen las facies cogenéticas BG y APG respectivamente, las cuales tienen contacto transicional con el RPG. E...

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Petrologic and geochemical links between the post-collisional Proterozoic Harney Peak leucogranite, South Dakota, USA, and its source rocks

Cited by 53 publications

References 38 publications

Generation and emplacement of shear-related highly mobile crustal melts: the synkinematic leucogranites from the Variscan Tormes Dome, Western Spain

Generation and emplacement of shear-related highly mobile crustal melts: the synkinematic leucogranites from the Variscan Tormes Dome, Western Spain

Geochemistry of Ferriferous, High-K Calc-Alkaline Granitoids from the Banefo-Mvoutsaha Massif (NE Bafoussam), Central Domain of the Pan- African Fold Belt, Cameroon~!2009-11-12~!2010-01-05~!2010-03-11~!

Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina

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