Antecrysts and their effect on rock compositions: The Cretaceous lamprophyre suite in the Catalonian Coastal Ranges (NE Spain)

Ubide, Teresa; Galé, Carlos; Larrea, Patricia; Arranz, Enrique; Lago, M.

doi:10.1016/j.lithos.2014.07.029

Cited by 65 publications

(57 citation statements)

References 41 publications

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“…The rock is a porphyritic camptonite composed of macrocrysts of clinopyroxene, amphibole, pseudomorphed olivine and opaque minerals standing out from a microcrystalline groundmass with amphibole, feldspars and minor biotite, apatite, analcime, calcite and recrystallised glass. Previous work revealed that most macrocrysts are not cognate phenocrysts but recycled antecrysts, and their growth stratigraphy records an intricate succession of magmatic processes in the plumbing system, including magma recharge, magma mixing and polybaric fractionation during magma ascent and emplacement (Ubide et al, 2014b). Here we present LA-ICP-MS maps of three macrocrysts, named 1) the 'little clinopyroxene'; 2) the 'elongated amphibole' and 3) the 'little amphibole' (Fig.…”

Section: Methodsmentioning

confidence: 94%

“…The studied magmatic intrusion belongs to the Late Cretaceous alkaline lamprophyre suite in the Catalonian Coastal Ranges (Ubide, 2013;Ubide et al, 2014b;Ubide et al, 2014c). Detailed petrography and geochemistry indicated that these lamprophyres were fed by a complex magmatic system, where ascending magmas entrained crystals from disparate crystallisation levels (Ubide et al 2014b).…”

Section: Methodsmentioning

confidence: 99%

“…Detailed petrography and geochemistry indicated that these lamprophyres were fed by a complex magmatic system, where ascending magmas entrained crystals from disparate crystallisation levels (Ubide et al 2014b). For the present study, we focused on a ~ 4 m subhorizontal sheet-like magma body (Molí d'en Ponç lamprophyre: UTM 31T 466218 4629029; Ubide et al, 2014b) that is an ideal target because: i) it has an alkaline composition with high concentrations of trace elements (Ubide et al, 2014b) that help producing small-scale maps; ii) it has large crystals of clinopyroxene and amphibole showing complex zoning patterns (Ubide et al, 2014b); and iii) CaO contents in clinopyroxene and amphibole crystals are homogeneous despite the marked zoning in other elements (see supplementary data Tables E1 and E2 from Ubide et al, 2014b), making Ca suitable for easy internal standardisation.…”

Section: Methodsmentioning

confidence: 99%

“…This has informed the premise that many large crystals, rather than being phenocrysts, should be regarded as antecrysts that formed prior to emplacement at depth (Charlier et al, 2005;Davidson et al, 2007;Gill et al, 2006;Hildreth and Wilson, 2007;Jerram and Martin, 2008;Larrea et al, 2013). The complexity within antecrysts implies the existence of complex magma plumbing systems with episodes of contamination, recharge and magma mixing (Francalanci et al, 2012;Sakyi et al, 2012;Ubide et al, 2014a;Ubide et al, 2014b). Events of recharge into deep magma chambers with a more primitive (often fluid-rich) batch of magma have been studied with particular interest as they are considered the main cause for triggering volcanic eruptions (e.g., Kent, 2013;Kent et al, 2010;Longpré et al, 2014;Myers et al, 2014;Reubi and Blundy, 2007).…”

Section: Introductionmentioning

confidence: 99%

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High-resolution LA-ICP-MS trace element mapping of igneous minerals: In search of magma histories

et al. 2015

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Section: Methodsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-resolution LA-ICP-MS trace element mapping of igneous minerals: In search of magma histories

et al. 2015

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“…12e, f). However, ijolite enclaves contain numerous primitive diopside antecrysts which can modify the bulk rock composition (e.g., Ubide et al, 2014b). The Ditrău ijolite enclaves have much higher Cr concentrations than an ijolite should possess, and it is most likely that these are composed of the primitive diopside antecrysts.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Insights into the evolution of an alkaline magmatic system: An in situ trace element study of clinopyroxenes from the Ditrău Alkaline Massif, Romania

Batki

Pál-Molnár

Jankovics

et al. 2018

Lithos

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Clinopyroxene is a major constituent in most igneous rock types (hornblendite, diorite, containing phonolitic (tinguaite) magma. This study shows that antecryst recycling, also described for the first time in Ditrău, is a significant process during magma recharge and demonstrates that incorporated crystals can crucially affect the host magma composition and so whole-rock chemical data should be interpreted with great care.

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Anatomy of Intraplate Monogenetic Alkaline Basaltic Magmatism

Brenna

Ubide

Nichols

et al. 2021

Geophysical Monograph Series

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Intraplate basaltic systems, often occurring as fields of small monogenetic volcanoes, are dominated by eruption of alkaline basaltic rocks, ranging from nephelinite/basanite to transitional/subalkaline. Their generally primitive erupted compositions imply limited crustal modification, and hence they provide an important probe into deep, lithospheric mantle and partial melting processes. Partial melting and magmatic ascent processes can be investigated using the composition of crystals, glass and wholerock, although a combination of these is preferable. The whole-rock chemical variability within single eruptions or over the temporal and spatial extent of a volcanic field is controlled by the characteristics of the primary melting source, as well as near source percolative/reaction processes. Coupled crystaland -whole-rock detailed investigations are most promising to constrain the processes that modify primary melts into the primitive magmas that accumulate before ascent. Complex crystal textures and chemistry have so far demonstrated that basaltic magmas are principally processed and modified within the lithospheric mantle with minor modification en-route through the crust. Fractional crystallization and magma mixing modify melts throughout ascent, and can imprint secondary chemical intra-eruptive variability. Quantifiable temperature and pressure parameters based on crystalmelt compositions constrain the depth of formation, and hence provide information about the role of different mineral phases in deep versus shallow chemical evolution. Volatile components in the melt (e.g. H2O and CO2) can be quantified on glass and melt inclusions. These analyses, coupled with solubility models, may help to reconstruct initial dissolved volatile content to further constrain the source characteristics and magmatic ascent dynamics. Integrated studies of crystals and melt paint a picture of extended lithospheric mantle to minor crustal processing resulting from the complex deep plumbing of monogenetic basaltic systems. This highlights the need for improved resolution to characterize true primary signatures and hence elucidate the formation of intraplate alkaline basalts.

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Antecrysts and their effect on rock compositions: The Cretaceous lamprophyre suite in the Catalonian Coastal Ranges (NE Spain)

Cited by 65 publications

References 41 publications

High-resolution LA-ICP-MS trace element mapping of igneous minerals: In search of magma histories

High-resolution LA-ICP-MS trace element mapping of igneous minerals: In search of magma histories

Insights into the evolution of an alkaline magmatic system: An in situ trace element study of clinopyroxenes from the Ditrău Alkaline Massif, Romania

Anatomy of Intraplate Monogenetic Alkaline Basaltic Magmatism

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