Petrology of Plutonic Xenoliths and Volcanic Rocks from Grenada, Lesser Antilles

Stamper, Charlotte C.; Blundy, Jonathan D.; Arculus, R. J.; Melekhova, Elena

doi:10.1093/petrology/egu027

Cited by 52 publications

(83 citation statements)

References 65 publications

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“…8). Ni contents are similar to those from St. Vincent (40-720 ppm; Tollan et al 2012), but significantly lower than cumulates from Grenada which range from 0-0.3 wt% (Stamper et al 2014). The CaO content varies with sample type from an average of 0.1 wt% in hornblende gabbronorites to 0.2 wt% in olivine gabbros (Fig.…”

Section: Olivinesupporting

confidence: 55%

“…8). The olivine is pristine with no signs of alteration to iddingsite or serpentine, in marked contrast to Grenada (Stamper et al 2014). CaO contents are <0.25 wt% and Ni contents are low (40-750 ppm) (Fig.…”

Section: Olivinementioning

confidence: 96%

“…Plutonic xenoliths from each individual island have distinctive characteristics in terms of mineralogy and petrology (e.g. Arculus and Wills 1980;Kiddle et al 2010;Stamper et al 2014;Tollan et al 2012) which influences the petrology and geochemistry of the juvenile erupted material on each of the islands.…”

Section: Geological Settingmentioning

confidence: 99%

“…On the other hand, plutonic xenoliths, representing erupted plutonic samples, have a greater preservation potential than phenocrysts in lavas and are therefore more likely to provide a window into the true fractionation history of magmas (Arculus and Wills 1980;Macdonald et al 2000). The Lesser Antilles Arc is exceptional globally in respect to the abundance and variety of erupted plutonic xenoliths, which are the focus 1 3 87 Page 2 of 21 of several studies (Lewis 1973;Arculus and Wills 1980;Tollan et al 2012;Stamper et al 2014). Therefore, the Lesser Antilles is an ideal location to study the relationship between extrusive and intrusive components of an arc magmatic system.…”

Section: Introductionmentioning

confidence: 99%

“…However, these models are unlikely to work in hydrous systems such as active island arcs (Meurer and Claeson 2002). Cumulate rocks from exposed arc crustal sections (Murray 1972; Greene et al 2006;Bouilhol et al 2015;Stuart et al 2015) and plutonic xenoliths (Smith 2014;Stamper et al 2014) can also record evidence for open system processes such as multiple magma replenishment episodes or percolating melts. Recently, the evolving liquids interacting with crystal mush and/or cumulate can be traced through the use of in situ trace element concentrations (Meurer and Claeson 2002) and large variations in incompatible trace elements may indicate an open system and an addition of melts into a crystal mush or cumulate pile.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Plutonic xenoliths from Martinique, Lesser Antilles: evidence for open system processes and reactive melt flow in island arc crust

Cooper

Davidson

Blundy

2016

Contrib Mineral Petrol

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Section: Olivinesupporting

confidence: 55%

Section: Olivinementioning

confidence: 96%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Plutonic xenoliths from Martinique, Lesser Antilles: evidence for open system processes and reactive melt flow in island arc crust

Cooper

Davidson

Blundy

2016

Contrib Mineral Petrol

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Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

Yanagida

Nakamura

Yasuda

et al. 2018

Geochem Geophys Geosyst

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The Ichinomegata maar, located in the back‐arc side of the northeastern Japan arc, erupted calc‐alkaline andesitic magma with abundant deep‐crustal and mantle xenoliths at about 60–80 ka. We investigated the relationship between fractionated solids and differentiated silicic melts at middle to lower crust conditions through petrologic analyses of hornblende‐bearing cumulate xenoliths and melt inclusions. The Sr and Nd isotope compositions are similar to those of the host magmas, suggesting their cognate origin. The crystallization sequence is determined to be olivine, spinel → clinopyroxene → hornblende, magnetite → plagioclase → apatite, based on the observation of texture and solid solution compositions. Of the five types of xenolith studied, the leuco‐hornblende gabbro preserved interstitial glass and melt inclusions with a silica content (SiO2) of 63.9–74.0 wt % and high water content (up to 8.1 wt %). Hornblende geobarometry indicates an equilibrium pressure of 0.39–0.64 GPa, which corresponds to a depth of 15–24 km. The delay of plagioclase crystallization due to high water content characterizes differentiation of the hydrous arc magma. We successfully constructed an internally consistent differentiation model of the corundum‐normative calc‐alkaline trend to the silicic melt inclusions, starting from primitive basalt via successive fractionation of a calculated wherlite and cumulate xenoliths. In middle to late stage differentiation, hornblende gabbros are the dominantly fractionated assemblages. Our results are consistent with published differentiation experiments of hydrous arc magmas and the lithology of the deep crust beneath the back arc of the NE Japan arc as estimated from seismic tomography.

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A mineral and cumulate perspective to magma differentiation at Nisyros volcano, Aegean arc

Klaver

Matveev

Berndt

et al. 2017

Contrib Mineral Petrol

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and these appear to be derived from the lower crust (0.5-0.8 GPa). The suppressed stability of plagioclase and early saturation of amphibole in these cumulates are indicative of high-pressure crystallisation from primitive hydrous melts (≥ 3 wt% H 2 O). Clinopyroxene in these cumulates has Al 2 O 3 contents up to 9 wt% due to the absence of crystallising plagioclase, and is subsequently consumed in a peritectic reaction to form primitive, Al-rich amphibole (Mg# > 73, 12-15 wt% Al 2 O 3 ). The composition of these peritectic amphiboles is distinct from trace element-enriched interstitial amphibole in shallower cumulates. Phenocryst compositions and assemblages in both suites differ markedly from the cumulates. Phenocrysts, therefore, reflect shallow crystallisation and do not record magma differentiation in the deep arc crust.

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Petrology of Plutonic Xenoliths and Volcanic Rocks from Grenada, Lesser Antilles

Cited by 52 publications

References 65 publications

Plutonic xenoliths from Martinique, Lesser Antilles: evidence for open system processes and reactive melt flow in island arc crust

Plutonic xenoliths from Martinique, Lesser Antilles: evidence for open system processes and reactive melt flow in island arc crust

Differentiation of a Hydrous Arc Magma Recorded in Melt Inclusions in Deep Crustal Cumulate Xenoliths from Ichinomegata Maar, NE Japan

A mineral and cumulate perspective to magma differentiation at Nisyros volcano, Aegean arc

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