Volcanic rock series in island arcs and active continental margins

Miyashiro, Akiho

doi:10.2475/ajs.274.4.321

Cited by 2,397 publications

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“…Arculus (2003). The red dashed line separates the tholeiitic from the calcalkaline fields (Miyashiro, 1974 Blusztajn and Hegner, 2002;Jung et al, 2005;Pfander et al, 2012) and Italy (Roman and Tuscan Provinces; Gasperini et al, 2002;Conticelli et al, 2007) are reported for comparison. The Italian subduction-related rocks plot towards very radiogenic Sr and unradiogenic Nd isotopic compositions, indicated by the arrow in Fig.…”

Section: Os Isotopesmentioning

confidence: 99%

“…Despite being classically ascribed to the calcalkaline rock association, the SR rocks do not show the typical Fe-poor composition, with Fe 2 O 3tot reaching 12.1 wt% (Conte et al, 2010). Following Miyashiro (1974), less than one half of the SR rocks are calcalkaline (i.e., plot below the dashed line in Fig. 5), whereas, according to Arculus (2003), the SR rocks should better defined as medium-to high-Fe types, with only a minor group of samples plotting in the low-Fe field (Fig.…”

Section: Sample Descriptionmentioning

confidence: 99%

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr-Nd-Pb-O-Hf-Os) and petrological view, LITHOS (2013), doi: 10.1016/j.lithos.2013.08.022 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Section: Os Isotopesmentioning

confidence: 99%

Section: Sample Descriptionmentioning

confidence: 99%

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Lustrino

Fedele

Melluso

et al. 2013

Lithos

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“…3: Chondrite-normalized rare earth element patterns (Evensen et al, 1978) for the two groups of mafic rocks from the Iguerda inlier respectively and 2.14 and 4.50 show a slight LREE enrichment of the rocks of this group. The enrichment of iron (12.77-18.55%) and titanium (1.37-2.98%) parallel to the differentiation index FeO*/MgO (1.74-2.81) confirms the tholeiitic character of this group (Miyashiro, 1974;Miyashiro and Shido, 1975) while the concomitant increase in TiO and FeO*/MgO reflects the typical 2 anisotitanium character of anorogenic areas (Fig. 4).…”

Section: Introductionmentioning

confidence: 77%

Geochemical and Geodynamic Implications of Mafic Dykes of the Iguerda Inlier (Central Anti-Atlas, Morocco)

Hassan¹,

Aouli²,

Amaouain³

2010

Online J. of Earth Sciences

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Abstract:In the inlier of Iguerda (Anti-Atlas, Morocco), the Neoproterozoic basic rocks consist dominantly of dolerite dykes intruded the Palaeoproterozoic basement and overlain by the late Neoproterozoic series. Major and immobile trace elements (HFS and REE elements) allow to identify 2 groups of mafic rocks: the 1st is tholeiitic, the 2nd shows a transitional affinity with chondrite normalized REE patterns more fractionated. Their geochemical signatures display similarities with those of intraplate series found in young continental rift structures (they are enriched in incompatible elements, excepted Y and Yb, relative to N-MORB but they are depleted in Nb). This preorogenic magmatism can be related to begining of rifting in the northern border of the West-African craton which allows the emplacement of bassins of Pan-African belt of Anti-Atlas. This rifting may be related to the opening of an oceanic domain in Siroua and Bou-Azzer areas.

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“…6) (Irvine & Baragar 1971) as well as, the FeO T /MgO and SiO 2 diagram (Fig. 7), (Miyashiro 1974), show their tholeiitic nature. The diagram of (Fe T +Ti)-Al-Mg, (Fig.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Petrogeochemistry of Amphibolites from Shivpura District Bhilwara, Rajasthan, India

Thomas

Paudel

2015

J. Inst. Sci. Tech.

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Amphibolites are frequently observed in the medium-to high-grade metamorphic rocks of Shivpura. These amphibolites are the result of the metamorphism of pre-existing mafic igneous rocks under medium to high grade P-T conditions and consist essentially of hornblende-plagioclase-garnet-clinopyroxene-epidote-iron oxide. Geochemically, these orthoamphibolites are tholeiitic, show association with non-orogenic environment and shift to subalkaline derivatives with progressive differentiation. It is also clear that the parent magma for these rocks was highly evolved in nature. Paper records the petrography, geochemical characters and a probable origin of these amphibolites.

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Volcanic rock series in island arcs and active continental margins

Cited by 2,397 publications

References 0 publications

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Origin and evolution of Cenozoic magmatism of Sardinia (Italy). A combined isotopic (Sr–Nd–Pb–O–Hf–Os) and petrological view

Geochemical and Geodynamic Implications of Mafic Dykes of the Iguerda Inlier (Central Anti-Atlas, Morocco)

Petrogeochemistry of Amphibolites from Shivpura District Bhilwara, Rajasthan, India

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