Geochemical Modelling of Igneous Processes – Principles And Recipes in R Language

Janoušek, Vojtěch; Moyen, Jean‐François; Martin, H.; Erban, Vojtěch; Farrow, Colin

doi:10.1007/978-3-662-46792-3

Cited by 66 publications

(51 citation statements)

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“…Trace elements do, in theory, follow contrasting laws. However, unless one is looking at very small melt fractions, and/or at elements with very strongly contrasted behaviors, the differences between different processes are relatively minor and not necessarily straightforward to identify (Janoušek et al, 2015). At the scale of a statistically representative dataset (such as we use here), such differences will be definitely drowned in the natural scatter of the data.…”

Section: Major Elements: Linking Granites To Their Sourcementioning

confidence: 97%

Collision vs. subduction-related magmatism: Two contrasting ways of granite formation and implications for crustal growth

Moyen

Laurent

Chelle-Michou

et al. 2017

Lithos

256

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Section: Major Elements: Linking Granites To Their Sourcementioning

confidence: 97%

Collision vs. subduction-related magmatism: Two contrasting ways of granite formation and implications for crustal growth

Moyen

Laurent

Chelle-Michou

et al. 2017

Lithos

256

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“…(a) Mixing hyperbolae from the previous studies, i.e., magma mixing (invoking the hypothetical Precambrian basement: curve A‐B [after Jahn et al ., ; Wang et al ., ]) and with the lowest Nd basalt as the mantle end‐member (A′‐B) were superimposed using the R code of Janoušek et al . []. Proportions of the juvenile depleted mantle‐derived end‐member are indicated (tick marks interval is 10%).…”

Section: Isotopic Analysis and Thermodynamic Modeling Of Melting Of Tmentioning

confidence: 99%

Anatexis of accretionary wedge, Pacific-type magmatism, and formation of vertically stratified continental crust in the Altai Orogenic Belt

et al. 2016

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Granitoid magmatism and its role in differentiation and stabilization of the Paleozoic accretionary wedge in the Chinese Altai are evaluated in this study. Voluminous Silurian‐Devonian granitoids intruded a greywacke‐dominated Ordovician sedimentary succession (the Habahe Group) of the accretionary wedge. The close temporal and spatial relationship between the regional anatexis and the formation of granitoids, as well as their geochemical similarities including rather unevolved Nd isotopic signatures and the strong enrichment of large‐ion lithophile elements relative to many of the high field strength elements, may indicate that the granitoids are product of partial melting of the accretionary wedge rocks. Whole‐rock geochemistry and pseudosection modeling show that regional anatexis of fertile sediments could have produced a large amount of melts compositionally similar to the granitoids. Such process could have left a high‐density garnet‐ and/or garnet‐pyroxene granulite residue in the deep crust, which can be the major reason for the gravity high over the Chinese Altai. Our results show that melting and crustal differentiation can transform accretionary wedge sediments into vertically stratified and stable continental crust. This may be a key mechanism contributing to the peripheral continental growth worldwide.

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“…Rare earth elements (REE) were quantified by inductive coupled plasma mass spectrometry (ICP-MS) techniques at Activation Laboratories Ltd., Ancaster, Canada, using a Perkin Elmer Sciex ELAN 6100 ICP mass spectrometer, following standard lithium metaborate/tetraborate fusion and acid decomposition sample preparation procedures (4B2-Research, http:// www.actlabs.com). Zircon and monazite saturation temperatures were calculated using the GCDkit 4.1 software (Janoušek et al 2016).…”

Section: Methodsmentioning

confidence: 99%

Source compositions and melting temperatures of the main granitic suites from the Moldanubian Batholith

René¹

2016

J. Geosci.

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The granitoids of the Moldanubian Batholith (Moldanubian Zone of the Bohemian Massif) are represented by three main suites: I-to I/S-type Weinsberg biotite granites-granodiorites, S-type Eisgarn two-mica granites and I/S-type Freistadt biotite granites-granodiorites. As shown by major-element data and zircon with monazite saturation thermometry, partial melting of metapelites likely produced most of the Eisgarn suite (Mrákotín/Číměř varieties) at c. 775-825 ºC. Parental melts of the Weinsberg and Freistadt suites could have been generated by partial melting of a metagreywackes-metabasalts mixture at c. 740-940 ºC. This study confirms that the CaO/Na 2 O ratio could be used for source assignment of S-type granite melts, whereas the CaO/(FeO + MgO + TiO 2 ) ratio is more suitable for I/S-type granites. The observed systematic positive shift of Al 2 O 3 / TiO 2 temperatures compared with zircon and monazite saturation temperatures in all granitoids of the Moldanubian Batholith (up to 118 ºC) may be explained by accumulation of ilmenite in the S-type Eisgarn suite. In the I-and I/S--granite types of the Weinsberg and Freistadt suites the Al 2 O 3 /TiO 2 ratio is controlled by the accumulation of ilmenite and/or titanite. Consequently, the Al 2 O 3 /TiO 2 ratio may be used as a thermometer only with caution. : granites, petrology, geochemistry, Moldanubian Zone, Bohemian Massif Received: 12 April, 2016; accepted: 3 January, 2017; handling editor: J. Žák The online version of this article (doi: 10.3190/jgeosci.223) contains supplementary electronic material. Keywordsthe majority of the Eisgarn suite at temperatures ranging from 770 to 830 ºC. Melts of the Weinsberg and Freistadt suites were generated by partial melting of a mixture of metagreywackes and metabasalts at temperatures in the range of 740-940 ºC.

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Geochemical Modelling of Igneous Processes – Principles And Recipes in R Language

Cited by 66 publications

References 0 publications

Collision vs. subduction-related magmatism: Two contrasting ways of granite formation and implications for crustal growth

Collision vs. subduction-related magmatism: Two contrasting ways of granite formation and implications for crustal growth

Anatexis of accretionary wedge, Pacific-type magmatism, and formation of vertically stratified continental crust in the Altai Orogenic Belt

Source compositions and melting temperatures of the main granitic suites from the Moldanubian Batholith

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