Voluminous granitic magmas from common basaltic sources

Sisson, T. W.; Ratajeski, Kent; Hankins, W. B.; Glazner, Allen F.

doi:10.1007/s00410-004-0632-9

Cited by 993 publications

(421 citation statements)

References 57 publications

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“…The (a) Na 2 O and (b) K 2 O composition of the rocks from the Funiushan pluton with published data for experimental melts. Experimentally produced glasses are from Beard and Lofgren (1991) (amphibolites; 1, 3, 6, 9 kb; 800-1000°C), Rapp and Watson (1995) (metabasalt; 8-32 kb; 1000-1125°C), Douce and Beard (1995) (quartz amphibolites; 3-15 kb; 850-930°C; biotite gneiss; 3-15 kb; 850-930°C) and Sisson et al (2005) (medium to high K basaltic rocks; 700 Mpa; 825-975°C). Fig.…”

Section: Geodynamic Backgroundmentioning

confidence: 99%

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

Gao

Zhao

Chen

2014

Journal of Asian Earth Sciences

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Section: Geodynamic Backgroundmentioning

confidence: 99%

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

Gao

Zhao

Chen

2014

Journal of Asian Earth Sciences

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“…Thus, felsic magmas that formed parts of the intrusive complexes in the study area, particularly the Garabal Hill-Glen Fyne complex, 7 could potentially represent the products of high-degree fractionation of the mantle-derived mafic magmas (e.g. Sisson et al, 2005;Whitaker, 2008), or they could represent crustal melts, with or without mixtures of mantle components. Below, we review the evidence for the types of basement materials that might be present in the deep crust of the region.…”

Section: Previous Isotope Researchmentioning

confidence: 99%

“…However, it is conceivable that the more felsic magmas could be differentiates of large volumes of mafic magmas, even though such volumes of mafic rock are not presently exposed. Sisson et al (2005) showed that hydrous, medium-to high-K mafic magmas may differentiate to produce significant volumes (12 to 25% of the original magma volume) of granitic (s.l.) liquid.…”

Section: Fractionation Modelsmentioning

confidence: 99%

Sources of post-orogenic calcalkaline magmas: The Arrochar and Garabal Hill–Glen Fyne complexes, Scotland

Clemens

Darbyshire

Flinders

2009

Lithos

113

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The 425 Ma Arrochar and Garabal Hill-Glen Fyne complexes of highland Scotland are examples of post-orogenic magmatism accompanying extensional collapse of an orogen, in this case the Caledonian. The rocks are dominantly high-K series, but range from medium-K to shoshonitic. Mantle upwelling, melting and the intrusion of large volumes of mafic magma into the crust are inferred to have accompanied lithospheric thinning, and to have provided the heat source for melting of young arc crust accreted during the preceding subduction epoch.Fluids evolved from the subducting slab are inferred to have caused high degrees of enrichment in the overlying mantle wedge. Deep in the crust, the mantle-derived, K-rich mafic to intermediate magmas mixed with felsic crustal melts to form the spectrum of magmas intruded in the two complexes. Microgranular enclaves in the granitic rocks represent mafic magmas derived from the enriched mantle and hybridised by reaction, diffusion and mechanical mixing with their host felsic magmas, but they do not form part of the evolutionary series that produced the host magmas. Rather than inheriting its LILEenriched character directly from crustal melts, or from crustal assimilation by mafic magmas, the high-K series may commonly owe at least part of its potassic character to the involvement of mantle (highly metasomatised by slab-derived fluids) as a major magma source. Enclave suites, though prominent in some granitic rocks should not be assumed to represent magmas that played a significant role in the production of the chemical variations in their host magmas.

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“…The origin of I-type granitoids in arcs is very much discussed, and proposed models can be grouped in two endmember processes: partial melting of amphibolites in the lower arc crust (e.g., Clemens 1990;Clemens and Vielzeuf 1987;Tatsumi et al 2008Tatsumi et al , 2009 or hydrous high-to medium-pressure magma differentiation with limited amount of assimilation in the lower crust (e.g., Davidson et al 2007;Jagoutz et al 2009;Sisson et al 2005). We have previously discussed the origin of the Kohistan arc granitoids based on a more limited dataset and from the perspective of processes in the lower arc crust exposed in the Southern Plutonic Complex and the Chilas Complex (Jagoutz 2010;Jagoutz et al 2009Jagoutz et al , 2011.…”

Section: Origin Of the Kohistan Batholith Granitoidsmentioning

confidence: 99%

“…Experiments have shown that at elevated pressure and water content, low-Si minerals such as amphibole, garnet and oxide occur early on in the fractionation sequence (Green 1972), pushing derivative liquids over a limited fractionation interval to Si-rich composition producing voluminous amounts of granitic compositions from a basaltic parent (Sisson et al 2005).…”

mentioning

confidence: 99%

TTG-type plutonic rocks formed in a modern arc batholith by hydrous fractionation in the lower arc crust

Jagoutz¹,

Schmidt

Enggist

et al. 2013

Contrib Mineral Petrol

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We present the geochemistry and intrusion pressures of granitoids from the Kohistan batholith, which represents, together with the intruded volcanic and sedimentary units, the middle and upper arc crust of the Kohistan paleo-island arc. Based on Al-in-hornblende barometry, the batholith records intrusion pressures from *0.2 GPa in the north (where the volcano-sedimentary cover is intruded) to max. *0.9 GPa in the southeast. The Al-in-hornblende barometry demonstrates that the Kohistan batholith represents a complete cross section across an arc batholith, reaching from the top at *8-9 km depth (north) to its bottom at 25-35 km (south-central to southeast). Despite the complete outcropping and accessibility of the entire batholith, there is no observable compositional stratification across the batholith. The geochemical characteristics of the granitoids define three groups. Group

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Voluminous granitic magmas from common basaltic sources

Cited by 993 publications

References 57 publications

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

Petrogenesis of the early Cretaceous Funiushan granites on the southern margin of the North China Craton: Implications for the Mesozoic geological evolution

Sources of post-orogenic calcalkaline magmas: The Arrochar and Garabal Hill–Glen Fyne complexes, Scotland

TTG-type plutonic rocks formed in a modern arc batholith by hydrous fractionation in the lower arc crust

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