Mafic magmatic enclaves and mafic rocks associated with some granitoids of the central Sierra Nevada batholith, California: nature, origin, and relations with the hosts

Barbarin, Bernard

doi:10.1016/j.lithos.2004.05.010

Cited by 575 publications

(271 citation statements)

References 63 publications

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“…5B). It is unlikely that this xenolith is cognate to the Jinfosi magma because the amphibolite has distinct mineralogy, texture and isotopic compositions (Barbarin, 2005;Huang et al, 2014). We interpret the xenolith as being country rock captured during magma emplacement.…”

Section: Accepted M Manuscriptmentioning

confidence: 85%

Garnet effect on Nd-Hf isotope decoupling: Evidence from the Jinfosi batholith, Northern Tibetan Plateau

Huang

Niu

2017

Lithos

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Section: Accepted M Manuscriptmentioning

confidence: 85%

Garnet effect on Nd-Hf isotope decoupling: Evidence from the Jinfosi batholith, Northern Tibetan Plateau

Huang

Niu

2017

Lithos

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“…The two sets of similar signatures, particularly the zircon Hf-O isotopes, could be the result of one of three processes: (1) zircon grains in the MMEs were transported from the host granitoids during magma mixing, (2) the MMEs and host granitoids attained isotopic equilibration during magma mingling and mixing (e.g., Allen, 1991;Barbarin, 2005;Dorais et al, 1990;Eberz and Nicholls 1990;Tindle, 1991) and (3) the mafic and felsic magmas had similar isotopic compositions (Zi et al, 2012). Although the introduction of crystals, such as K-feldspars, from host to enclave magmas has been documented in this study ( Fig.…”

Section: Implications Of Similar Mme and Host Granitoid Isotopic Compmentioning

confidence: 99%

“…It is widely accepted that mafic and felsic microgranular enclaves result from the mixing or mingling of mafic and crustal felsic magmas (e.g., Barbarin, 2005;Blundy and Sparks, 1992;Dorais et al, 1990;Feeley et al, 2008;Sun et al, 2010;Vernon, 1984Vernon, , 1990Wang et al, 2012;Wiebe et al, 1997;Yang et al, 2006Yang et al, , 2007. Two other proposals suggest that they are: (1) fragments of recrystallized, refractory metamorphic rocks or of melt residues from the granite source (e.g., Chappell and White, 1991;Chappell and Wyborn, 2012;Chappell et al, 1987); or (2) cumulates of early-formed crystals or chilled margins (e.g., Bonin, 1991;Collins et al, 2006;Donaire et al, 2005;Shellnutt et al, 2010;Tindle and Pearce, 1983).…”

Section: Introductionmentioning

confidence: 99%

“…Distinguishing between these scenarios requires the ability to characterize the primary source of both the microgranular enclaves and their host granitoids. Compared with whole rock Sr and Nd isotopic compositions, which are easy equilibrated between the microgranular enclaves and adjacent host granitoids (e.g., Barbarin, 2005;Yang et al, 2007), in situ minerals can retain their initial isotopic compositions. Thus, in situ isotopic analysis is commonly used to trace the origin and petrogenetic processes of microgranular enclaves and granites (e.g., Sun et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Overlapping Sr–Nd–Hf–O isotopic compositions in Permian mafic enclaves and host granitoids in Alxa Block, NW China: Evidence for crust–mantle interaction and implications for the generation of silicic igneous provinces

Wei

Wang

et al. 2015

Lithos

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“…A very common MME feature at the macro-scale is the occurrence of host-derived crystals (usually plagioclase, K-feldspar, biotite), either within the enclaves or even cross-cutting the contacts between the enclaves and host (e.g. Collins et al 2000;Barbarin, 2005). These features are considered as proofs of mass transfer between the interacting magmas and as indications that the enclaves were in a liquid state upon their incorporation into the more felsic magma (e.g.…”

Section: A Qmzdmentioning

confidence: 99%

Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia)

et al. 2010

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-The Mt Cer Pluton, Serbia, is a complex laccolith-like intrusion (∼ 60 km 2 ), situated along the junction between the southern Pannonian Basin and northern Dinarides. It intrudes Palaeozoic metamorphic rocks causing weak to strong thermal effects. Based on modal and chemical compositions, four rock-types can be distinguished: (1) metaluminous I-type quartz monzonite/quartz monzodiorite (QMZD); (2) peraluminous S-type two-mica granite (TMG), which intrudes QMZD; (3) Stražanica granodiorite/quartz monzonite (GDS); and (4) isolated mafic enclaves (ME), found only in QMZD. 40 K-39 Ar dating and geological constraints indicate that the main quartz monzonite/quartz monzodiorite body of Mt Cer was emplaced not later than 21 Ma, whereas the emplacement ages of the Stražanica granodiorite/quartz monzonite and two-mica granites are estimated at around 18 and 16 Ma, respectively. The Mt Cer pluton is similar to the Mt Bukulja pluton, some 80 km southwestwards. Genesis of QMZD cannot be interpreted by fractional crystallization coupled with mixing or assimilation. It is best explained by a convection-diffusion process between mantle-derived minette/leucominette magmas and GDS-like magmas followed by two end-member magma mixing. The composition of GDS rocks suggests that GDS-like magmas could have formed by melting of lower crustal lithologies similar to amphibolite/metabasalts. The geochemistry of TMG is reproduced by an Assimilation/Fractional Crystallization model with a ratio of rate of assimilation to rate of fractional crystallization of 0.4, using the compositions of the least evolved TMG of the Bukulja pluton and adjacent metamorphic rocks as proxies for the parental magma and contaminant, respectively. The origin and evolution of the Mt Cer and adjacent Mt Bukulja plutons provide new constraints on the Tertiary geodynamics of the northern Dinarides-southern Pannonian region. The quartz monzonite/quartz monzodiorite is interpreted as a result of the Oligocene post-collisional Dinaride orogen-collapse, which included a limited lithosphere delamination, small-scale mantle upwelling, and melting of the lower crust. By contrast, the two-mica granite magmas formed through melting in shallower crustal levels during the extensional collapse in the Pannonian area.

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Mafic magmatic enclaves and mafic rocks associated with some granitoids of the central Sierra Nevada batholith, California: nature, origin, and relations with the hosts

Cited by 575 publications

References 63 publications

Garnet effect on Nd-Hf isotope decoupling: Evidence from the Jinfosi batholith, Northern Tibetan Plateau

Garnet effect on Nd-Hf isotope decoupling: Evidence from the Jinfosi batholith, Northern Tibetan Plateau

Overlapping Sr–Nd–Hf–O isotopic compositions in Permian mafic enclaves and host granitoids in Alxa Block, NW China: Evidence for crust–mantle interaction and implications for the generation of silicic igneous provinces

Petrogenetic and tectonic inferences from the study of the Mt Cer pluton (West Serbia)

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