Origins of co-existing diverse magmas in a felsic pluton: the Lysterfield Granodiorite, Australia

Clemens, J. D.; Bezuidenhout, Abraham F.

doi:10.1007/s00410-014-0991-9

Cited by 41 publications

(20 citation statements)

References 54 publications

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“…Thus, the Selwyn Block is not only important as a factor relating to the sedimentation and subsequent deformation of the Melbourne Zone during the Tabberabberan, but it is highly likely to contain the protoliths of the crustal components of the granitic magmas (e.g. Clemens et al 2011a, b;Clemens and Birch 2012;Clemens and Bezuidenhout 2014;Clemens and Phillips 2014).…”

Section: Regional Geologymentioning

confidence: 97%

“…Thus, these ME do seem to indicate the involvement of mantle-derived magmas, albeit much hybridised with crustal material (e.g. Vernon 1984Vernon , 1990; Eberz and Nicholls 1988;Elburg and Nicholls 1995;Elburg 1996;Wiebe et al 1997;Clemens and Bezuidenhout 2014). The debate then revolves around the stage at which the ME were included in their host granitic magmas, how and where the ME became hybridised and whether the presence of the magmas parental to the ME produced significant compositional changes in the host magmas.…”

Section: Introductionmentioning

confidence: 92%

“…All the felsic volcanism and plutonism of this age here is late postorogenic and seems to be related to extensional tectonics, with the development of large terrestrial, red-bed basins together with some mafic volcanism. Clemens and Bezuidenhout (2014) described the Lysterfield pluton and its petrogenesis in some detail. The Lysterfield pluton contains at least four separate magma series derived from contrasting lithological elements of the source terrane.…”

Section: The Tynong Plutonmentioning

confidence: 99%

“…The heterogeneous distribution of enclaves within their host magmas provides further evidence of mingling rather than mixing (Ventura et al 2006). Based on field observations and the previous studies referred to earlier, Clemens and Bezuidenhout (2014) produced a model for ME origins that may have general applicability. The conclusion is that the ME represent a definite mantle connection with the production of granitic magmas but that they do not normally signify a significant role for crust-mantle magma mixing in the genesis of their host granitic rocks.…”

Section: Introductionmentioning

confidence: 97%

“…Recent contributions on the origins of granitic and silicic volcanic complexes in the Victorian sector of the Lachlan Orogen have mainly emphasised source heterogeneity and the role of PAE (e.g. Clemens et al 2011a, b;Clemens and Birch 2012;Clemens and Bezuidenhout 2014;Clemens and Phillips 2014). Most of this work has been on S-type rocks.…”

Section: Introductionmentioning

confidence: 98%

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The Tynong pluton, its mafic synplutonic sheets and igneous microgranular enclaves: the nature of the mantle connection in I-type granitic magmas

Clemens

Regmi

Nicholls

et al. 2016

Contrib Mineral Petrol

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quartz dioritic sheets. Despite this evidence of direct mantle input into the Tynong magma system, the main granodioritic series do not appear to have been formed by magma mixing processes. Of any I-type granite in the region, the Tynong pluton has perhaps the most direct connection with mantle magmas. Nevertheless, the main mantle connection here is probably in the mantle-derived protolith for these crustal magmas and in the mantle thermal event that gave rise to melting of the deep crust in the Selwyn Block. This degree of mantle connectedness seems typical for I-type granitic rocks worldwide.

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Section: Regional Geologymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 92%

Section: The Tynong Plutonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

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The Tynong pluton, its mafic synplutonic sheets and igneous microgranular enclaves: the nature of the mantle connection in I-type granitic magmas

Clemens

Regmi

Nicholls

et al. 2016

Contrib Mineral Petrol

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Sr‐Nd‐Hf‐O isotope geochemistry of the Ertaibei pluton, East Junggar, NWChina: Implications for development of a crustal‐scale granitoid pluton and crustal growth

Tang

Wang

Zhang

et al. 2017

Geochem Geophys Geosyst

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To better understand the compositional diversity of plutonic complexes and crustal growth of the Central Asian Orogenic Belt (CAOB), we conducted an integrated study of the Ertaibei pluton, which obtained geochronological, petrological, geochemical, and isotopic (including whole rock Sr‐Nd, in situ zircon Hf‐O) data. The pluton (ca. 300 Ma) is composed of granodiorites that contain mafic microgranular enclaves (MMEs), dolerite dikes, and granite dikes containing quartz‐tourmaline orbicules. The dolerite dikes were possibly generated by melting of an asthenospheric mantle source, with discrete assimilation of lower crustal components in the MASH (melting, assimilation, storage, and homogenization) zone. The MMEs originated from hybridization between mantle and crust‐derived magmas, which spanned a range of melting depths (∼25–30 km) in the MASH zone and were episodically tapped. Melting of the basaltic lower crust in the core of the MASH zone generated magmas to form the granodiorites. The granite dikes originated from melting of an arc‐derived volcanogenic sedimentary source with a minor underplated basaltic source in the roof of the MASH zone (∼25 km). The compositional diversity reflects both the magma sources and the degree of maturation of the MASH zone. Although having mantle‐like radiogenic isotope compositions, the Ertaibei and other postcollisional granitoids show high zircon δ18O values (mostly between +6 and +9‰), indicating a negligible contribution to the CAOB crustal growth during the postcollisional period.

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Inferring a deep-crustal source terrane from a high-level granitic pluton: the Strathbogie Batholith, Australia

Clemens

Phillips

2014

Contrib Mineral Petrol

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The Strathbogie Igneous Complex is comprised of the ignimbritic rocks of the Violet Town Volcanics and the granitic rocks of the Strathbogie batholith. It is Late Devonian in age and postorogenic-extensional in tectonic setting. The batholith was constructed from peraluminous, metasediment-derived magmas emplaced as several internally heterogeneous plutons. Chemical variation in the magmas was largely inherited from the protolith rather than having been produced by differentiation (crystal-liquid separation) or magma mixing. The Strathbogie magmas formed during a granulite-facies metamorphic event that caused partial melting of the rocks of the Proterozoic Selwyn Block, which forms the basement in this region. The chemistry of the Strathbogie batholith, the Violet Town Volcanics and various other felsic complexes of similar age, implies that the Selwyn Block here originally consisted of andesite, dacite, greywacke and pelite, probably deposited in a back-arc extensional setting.The sedimentary components of this protolith may have been deposited in a basin that was extending and deepening with time, so that the sediments contained progressively higher ratios of clay to volcanic materials. Much later, in the Late Devonian, extensional tectonics allowed the emplacement of mantle magmas into the deep and middle crust, causing the lowpressure granulite-facies metamorphic event that was responsible for the production of the crustal components in the granitic magmas of Central Victoria.

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Origins of co-existing diverse magmas in a felsic pluton: the Lysterfield Granodiorite, Australia

Cited by 41 publications

References 54 publications

The Tynong pluton, its mafic synplutonic sheets and igneous microgranular enclaves: the nature of the mantle connection in I-type granitic magmas

The Tynong pluton, its mafic synplutonic sheets and igneous microgranular enclaves: the nature of the mantle connection in I-type granitic magmas

Sr‐Nd‐Hf‐O isotope geochemistry of the Ertaibei pluton, East Junggar, NWChina: Implications for development of a crustal‐scale granitoid pluton and crustal growth

Inferring a deep-crustal source terrane from a high-level granitic pluton: the Strathbogie Batholith, Australia

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