Northeast- or southwest-dipping subduction in the Cretaceous Caribbean gateway?

Hastie, Alan R.; Cox, Sophie; Kerr, Andrew C.

doi:10.1016/j.lithos.2021.105998

Cited by 6 publications

(4 citation statements)

References 60 publications

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“…The Great Arc of the Caribbean (GAC) is the magmatic expression of this subduction. Magmatic arc samples from the southern Aves Ridge and Leeward Antilles offshore Venezuela indicate that subduction occurred there since the middle-late Cretaceous (Coniacian; Neill et al, 2011) or after Santonian (Hastie et al, 2021). During the Paleocene and the early Eocene, the motion of the North American Plate relative to the Caribbean plate changed from north-eastward to eastward (Pindell and Kennan, 2009;Boschman et al, 2014).…”

Section: Tectono-magmatic Evolution Of the Ne Caribbean Since The Cretaceousmentioning

confidence: 99%

Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles

Cornée

Münch

Philippon

et al. 2021

Earth-Science Reviews

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Our study aims to reconstruct the palaeogeography of the northern part of the Lesser Antilles in order to analyse whether emerged areas might have existed during the Cenozoic, favouring terrestrial faunal dispersals between South America and the Greater Antilles along the present-day Lesser Antilles arc. The stratigraphy and depositional environments of the islands of Anguilla, St Martin, Tintamarre, St Barthélemy, Barbuda and Antigua are reviewed in association with multichannel reflection seismic data acquired offshore since the 80's in the Saba, Anguilla and Antigua Banks and in the Kalinago Basin, including the most recent academic and industrial surveys. Seven seismic megasequences and seven regional unconformities are defined, and calibrated from deep wells on the Saba Bank and various dredges performed during marine cruises since the 70's in the vicinity of the islands. Onshore and offshore correlations allow us to depict an updated and detailed sedimentary organisation of the northern part of the Lesser Antilles from the late Eocene to the late Pleistocene. Paleogeographic reconstructions reveal sequences of uplift and emergence across hundredswide areas during the late Eocene, the late Oligocene, the early middle-Miocene and the latest Miocene-earliest Pliocene, interspersed by drowning episodes. The ∼200 km-long and ∼20 km-wide Kalinago Basin opened as an intra-arc basin during the late Eocene -early Oligocene. These periods of emergence may have favoured the existence of episodic mega-islands and transient terrestrial connections between the Greater Antilles, the Lesser Antilles and the northern part of the Aves Ridge (Saba Bank). During the Pleistocene, archipelagos and mega-islands formed repeatedly during glacial maximum episodes.

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Section: Tectono-magmatic Evolution Of the Ne Caribbean Since The Cretaceousmentioning

confidence: 99%

Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles

Cornée

Münch

Philippon

et al. 2021

Earth-Science Reviews

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“…Recently, geochemistry of Cretaceous lavas from the Virgin Islands without a mantle plume component led Hastie et al. (2021) to conclude that the Caribbean subduction polarity reversal occurred in the Turonian‐Campanian. However, the OIB‐E‐MORB source identified in the forearc, arc and retroarc (Figure 13) suggests the opposite.…”

Section: Discussionmentioning

confidence: 99%

Review of Geochronologic and Geochemical Data of the Greater Antilles Volcanic Arc and Implications for the Evolution of Oceanic Arcs

Stern

Rojas‐Agramonte

et al. 2022

Geochem Geophys Geosyst

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The fossil Greater Antilles Arc (GAA), part of the Great Arc of the Caribbean (Burke, 1988), provides an unusual opportunity to examine the complete evolution of an intra-oceanic convergent margin from birth to demise, especially because much of it is exposed above sea-level. Igneous and metamorphic rocks of the GAA (Figure 1) record subduction beneath the Caribbean plate during the Cretaceous and Paleogene spanning about 90 m.y. all through the present ca. 2,000 km length of the convergent margin (e.g., Iturralde-Vinent et al., 2016;Mann et al., 2007; Pindell & Kennan, 2009 and references therein). In most interpretations, the subducting lithosphere corresponds to the North and South American plates separated by the Proto-Caribbean ridge during the GAA lifetime (e.g.,

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“…Adakites are typically considered to be derived from partial melting of metamorphosed basalt or the fractional crystallization of island arc magmas (Hastie et al, 2021), being one of most important diagnostic indicators for subduction and continental growth. The Jijitaizi-Xingxingxia area is located in the Eastern Tianshan orogenic belt linking with the Beishan orogenic belt in the east and is bounded to the north and south by two important faults in the Middle Tianshan Orogenic belt, which is a key area for the study of tectonic evolution and formation of the Eastern Tianshan.…”

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confidence: 99%

Episodic Paleozoic Adakitic Magmatism in the Eastern Tianshan, Southern Altaids: Implications for Petrogenesis and Geodynamics

Wang

Xiao

Mao

et al. 2022

Acta Geologica Sinica (Eng)

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The adakites rocks are typically considered as direct diagnostic evidence for subduction and continental growth, as well as the important evidence to determine the location of the major oceanic basin and evolution history of lost oceanic basins, which are longstanding conundrums for understanding the tectonics of the Paleo‐Asian Ocean (PAO). As the processor of the Altaids, the PAO was a long‐lived ocean, and its multiple subductions led to substantial continental growth in the Central Asian continent. Here we report our newly discovered Paleozoic adakitic rocks (granite and dacite) developed in Jijitaizi in the Eastern Tianshan of the southern Altaids to address the above issues. The Jijitaizi granite and dacite contain high concentrations of Sr (203–343 ppm) and low concentrations of Y (3.00–6.36 ppm) and Yb (0.23–0.62 ppm), indicative of the adakitic affinity. Zircon U‐Pb dating results show that the adakitic rocks were formed in three episodes at 372.26 ± 1.51 Ma, 356.02 ± 1.11 Ma and 334.51 ± 0.68 Ma from the Late Devonian to Carboniferous. The rocks are depleted in Nb, P and Ti, and possess variable Mg# values (28.51–57.22), high Na2O/K2O ratios (1.39–4.94), as well as relatively depleted Hf isotopic compositions, all of which point to a subduction origin from slab melting. Our new finding with the date from the Jijitaizi complex (ca. 321 Ma) suggests continuing subduction of the Paleo‐Asian oceanic slab beneath the Central Tianshan from the Late Devonian to Carboniferous. Our work provides a solid line of key evidence demonstrating that continuous oceanic subduction of the major PAO evolved into its mature stage following subducting beneath the Central Tianshan from ca. 372 to 321 Ma.

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Northeast- or southwest-dipping subduction in the Cretaceous Caribbean gateway?

Cited by 6 publications

References 60 publications

Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles

Lost islands in the northern Lesser Antilles: possible milestones in the Cenozoic dispersal of terrestrial organisms between South-America and the Greater Antilles

Review of Geochronologic and Geochemical Data of the Greater Antilles Volcanic Arc and Implications for the Evolution of Oceanic Arcs

Episodic Paleozoic Adakitic Magmatism in the Eastern Tianshan, Southern Altaids: Implications for Petrogenesis and Geodynamics

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