Secular Geochemistry of Central Puerto Rican Island Arc Lavas: Constraints on Mesozoic Tectonism in the Eastern Greater Antilles

Jolly, Wayne T.; Lidiak, Edward G.; Dickin, A. P.; Wu, Tian

doi:10.1093/petrology/42.12.2197

Cited by 57 publications

(44 citation statements)

References 56 publications

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“…The primitive mantle-normalized trace element spectrum of the norite-enderbite series has similarities to recent subduction-related mafi c and intermediate arc volcanics (e.g. Shinjo et al, 2000;Churikova et al, 2001;Jolly et al, 2001;Hochstaedter et al, 2001). In particular the peaks of Rb, Ba, K, and Sr, observed in the LGB, are considered to indicate a subduction-related extra component in the spectrum (Pearce, 1983) while the relative even depletion of Nb, Ta and Ti might indicate removal of these components to the mantle due to a refractory eclogitic slab (MacDonough, 1991).…”

Section: Evolution Of the Norite-enderbite Seriesmentioning

confidence: 84%

“…The latter is considered one of the strongest pieces of evidence for subduction-related magmatism even in palaeoigneous rocks (Leybourne et al, 1999). Also, the negative anomalies at Zr and Th observed in the LGB are common in subduction environment magmatism (Pearce, 1983;Jolly et al, 2001). It is thus evident that a volcanic arc existed between the Karelian province, now in the south and southwest, and the Kola Province including the Inari Terrane, now in the northeast of the LGB.…”

Section: Evolution Of the Norite-enderbite Seriesmentioning

confidence: 99%

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Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology

Tuisku¹,

Mikkola²,

Huhma³

2006

Bull Geol Soc Finland

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The Palaeoproterozoic Lapland granulite belt was juxtaposed between Archaean and Proterozoic terrains in the NE part of the Fennoscandian Shield concurrently with the accretion of Svecofennian arc complexes at ~1.9 Ga. The belt consists mainly of aluminous migmatitic metagreywackes. Abundant noritic to enderbitic magmas were intruded concordantly into the metasediments and were probably an important heat source for metamorphism, which took place during the crystallization of the magmas. This is supported by structural and contact relations of metasediments and igneous rocks, and by the lack progressive metamorphic reaction textures in the igneous rock series. The peak of metamorphism took place above the dehydration melting temperature of the biotite-sillimanite-plagioclase-quartz assemblage at 750−850°C and 5−8.5 kbar which lead to formation of a restitic palaeosome and peraluminous granitic melt in metapelites. Subsequently, the rocks were decompressed and cooled below the wet melting temperature of pelitic rocks (650°C) under the stability fi eld of andalusite coexisting with potassium feldspar (2−3 kbar). Cooling was accompanied by the crystallization of the neosomes, often carrying aluminium-rich phases. Postmetamorphic duplexing of the LGB is clearly seen in the distribution of calculated PT conditions.

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Section: Evolution Of the Norite-enderbite Seriesmentioning

confidence: 84%

Section: Evolution Of the Norite-enderbite Seriesmentioning

confidence: 99%

Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology

Tuisku¹,

Mikkola²,

Huhma³

2006

Bull Geol Soc Finland

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“…Maimón muestran valores de La e Yb similares a los de los arcos de Tonga y South Sandwich (Fig. 8b); estos arcos se habrían formado por tasas de fusión de peridotita espinélica superiores al 25% (Jolly et al, 2001 y sus referencias).…”

Section: Descifrando La Contribución Del Manto Y La Corteza Subducidaunclassified

“…In (a), values of DM (depleted mantle) are from Staudigel et al (1998);values of N-MORB (normal MORB), E-MORB (evolved MORB) and OIB (oceanic island basalts) are from Sun and McDonough (1989); fields of oceanic and continental arcs are from Pearce (2014). Compositional fields in (b) were drawn from compilation after Jolly et al (2001).…”

Section: Figure 7 Geochemistry Of Felsic Rocks From the Maimóm Fm (mentioning

confidence: 99%

“…135 Ma (Rojas-Agramonte et al, 2011;Pindell et al, 2012). El arco-isla de las Antillas Mayores contiene un amplio registro de volcanismo asociado a subducción que, prolongándose durante más de 70 Ma, abarca términos boniníticos y toleíticos de arco (IAT) del Cretácico Inferior en gradación general hasta series calco-alcalinas ricas en K del Cretácico Superior (Donnelly y Rogers, 1980;Donnelly et al, 1990;Lebron y Perfit, 1994;Kerr et al, 1999;Jolly et al, 2001), si bien existen toleítas de arco del Cretácico Superior (e.g. Proenza et al, 2006;Marchesi et al, 2007).…”

Section: Introductionunclassified

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The geochemistry of the Maimón Formation (Central Cordillera, Dominican Republic) revisited

Torró¹,

Proenza²,

García-Casco³

et al. 2017

Bol. geol. min.

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RESUMENLos materiales volcánicos de la Formación Maimón, metamorfizados en facies de esquistos verdes, son representativos del magmatismo más antiguo registrado en el arco-isla del Cretácico del Caribe. A partir de nuevos datos geoquímicos de roca total y mediante el uso de elementos traza inmóviles (elementos de alto potencial iónico -HFSE, tierras raras -REE), se reconoce el predominio de protolitos basálticos y una menor proporción de rocas de composición intermedia y ácida. Geoquímicamente, los protolitos basálticos han sido clasificados como boninitas, toleítas de arco de isla pobres en Ti y LREE, toleítas de arco de isla pobres en Ti normales y escasas toleítas de arco de isla normales. Las rocas ácidas presentan claras afinidades boniníti-cas y toleíticas y pertenecerían al tipo M (derivadas del manto). La geoquímica de las toleítas pobres en Ti y LREE permite su clasificación como FAB (Fore-Arc Basalts, i.e. basaltos de ante-arco), término recientemente acuñado para describir toleítas con rasgos de MORB (basaltos de dorsal centro-oceánica) identificados en el ante-arco de Izu-Bonin-Mariana. La presencia de FAB y su correlación estratigráfica con boninitas son indicativas de formación en un contexto de ante-arco durante los primeros estadios magmáticos en un régimen extensional ligado al inicio de la subducción y el nacimiento del arco-isla. La Fm. Maimón puede representar la sección superior (volcánica) de una ofiolita tipo "inicio de subducción" .

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Petrogenesis of Carboniferous volcanic rocks from the Gangou area, Chinese North Tianshan: Constraints on the evolution of the North Tianshan Ocean

Yang

Gong

et al. 2019

Geological Journal

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The time duration and evolution of the major North Tianshan Ocean (also the Junggar Ocean) in the Chinese Tianshan orogenic collage remain poorly constrained. Here we report new geochronological and geochemical data of Carboniferous volcanic rocks documented from the North Tianshan accretionary complex in the Gangou area (Xinjiang, NW China). The studied rocks include basaltic andesites and andesites, with one andesite yielding a zircon U–Pb age of 332 ± 4 Ma. This reflects nearly synchronous eruption of the volcanics with the formation of host Early Carboniferous Yamansu Formation. These rocks are mostly tholeiitic in compositions, with a few samples transitioning to calcalkaline. All the samples show enriched LREE and LILE but depleted HFSE, a ubiquitous subduction signature observed in supra‐subduction zone volcanics. The positive εNd(t) (+5.2 to +6.7) and low initial 87Sr/86Sr (0.7038 to 0.7040) in these rocks suggest derivation from a MORB‐depleted peridotite source. However, the overall low MgO contents (and Mg#) in these rocks compared with typical high‐Mg andesites indicate that they are less likely formed via simple melting of metasomatized mantle wedge peridotites. Instead, partial melting of mafic‐ultramafic metasomes (e.g., pyroxenites) formed by slab melts/fluids‐peridotite interactions may explain these rocks. The studied rocks share many geochemical similarities with those Early Carboniferous volcanic rocks widely documented from the Chinese Western Tianshan and those volcanics from typical continental arcs (e.g., the Gangdese arc). Therefore, we suggest the volcanic rocks, combining with recent results from the North Tianshan ophiolites, tend to support a continued southward subduction of the major North Tianshan Ocean from the Cambrian to the Carboniferous periods.

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Secular Geochemistry of Central Puerto Rican Island Arc Lavas: Constraints on Mesozoic Tectonism in the Eastern Greater Antilles

Cited by 57 publications

References 56 publications

Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology

Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology

The geochemistry of the Maimón Formation (Central Cordillera, Dominican Republic) revisited

Petrogenesis of Carboniferous volcanic rocks from the Gangou area, Chinese North Tianshan: Constraints on the evolution of the North Tianshan Ocean

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