Record of massive upwellings from the Pacific large low shear velocity province

Madrigal, Pilar; Gazel, Esteban; Flores, Kennet E.; Bizimis, Michael; Jicha, Brian R.

doi:10.1038/ncomms13309

Cited by 42 publications

(96 citation statements)

References 82 publications

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“…Unfortunately, this approach was not thoroughly applied to the plateau remnants and overlapping sequences exposed in the forearc area coinciding with the Nicoya Peninsula (Figures 2b and 3). Boschman, van Hinsbergen, Torsvik, Spakman, & Pindell, 2014;Hauff et al, 2000;Madrigal, Gazel, Flores, Bizimis, & Brian, 2016;Pindell & Kennan, 2009) are incompatible with the stratigraphic record of the terranes and forearc sequences outlined here. Boschman, van Hinsbergen, Torsvik, Spakman, & Pindell, 2014;Hauff et al, 2000;Madrigal, Gazel, Flores, Bizimis, & Brian, 2016;Pindell & Kennan, 2009) are incompatible with the stratigraphic record of the terranes and forearc sequences outlined here.…”

Section: Introductionmentioning

confidence: 58%

“…South of this boundary, the Costa Rican isthmus is floored by a CLIP-like mafic basement (geophysical studies: Sallar es, Dañobeitia, & Flueh, 2001;Brasse et al, 2009;geochemical study: Feigenson, Carr, Maharaj, Juliano, & Bolge, 2004). It is not possible to distinguish the Manzanillo Terrane from the (Schmidt-Effing, 1979;Bandini et al, 2008) Planktonic Foraminifera (Azéma & Tournon, 1979) 40Ar/39Ar age (Sinton et al, , 2009Alvarado et al, 1997;Hauff et al, 2000;Hoernle et al, 2004: Madrigal et al, 2016 87Sr/86Sr on Inoceramus (Flores et al, 2003a;Weber, 2013) Radiolaria (this study) Nicoya Complex on the basis of plateau geochemistry alone. The distinction between the two terranes is mainly based on their age characteristics and on age and facies of the associated sediments (see below).…”

Section: The Manzanillo Terranementioning

confidence: 76%

“…Onland, plateau igneous rocks crop out from Costa Rica to Ecuador, and in Curac ßao, Aruba, Hispaniola and Jamaica (Kerr, White, Thompson, Tarney, & Saunders, 2003;Vallejo et al, 2009). Plateau rocks of Early Cretaceous age are known from the Costa Rican active margin (Nicoya Peninsula; Hoernle et al, 2004;Madrigal et al, 2016;Figures 2b and 3). They probably originated from domains affected by plume activity unrelated to the Gal apagos hotspot and were subsequently accreted (Baumgartner, Flores, Bandini, Girault, & Cruz, 2008;Boschman et al, 2014;Hoernle et al, 2004;Madrigal et al, 2016).…”

Section: Oceanic Plateau Occurrences In the Caribbean Platementioning

confidence: 99%

“…The Manzanillo Terrane is composed of plateau igneous lithologies (120-116 and 96-90 Ma; Sinton et al, 1997;Hauff et al, 2000;Hoernle et al, 2004;Madrigal et al, 2016) intruded by an OIB-like alkaline suite (ca. 89 Ma, Tortugal; Alvarado, Denyer, & Sinton, 1997;Hauff et al, 2000;Sinton, Pyle, Hanan, Denyer, & Alavarado, 2009).…”

Section: The Manzanillo Terranementioning

confidence: 99%

“…The boundary with the Nicoya Complex is tentatively set along the Limones-Cañas fault system (Denyer et al, 2014b;Figure 3b). Except for the Tortugal picrites, these terranes share many similarities in terms of major, trace and isotopic compositions, which suggest a common mantle source (Hauff et al, 2000;Madrigal et al, 2016). It is not possible to distinguish the Manzanillo Terrane from the (Schmidt-Effing, 1979;Bandini et al, 2008) Planktonic Foraminifera (Azéma & Tournon, 1979) 40Ar/39Ar age (Sinton et al, , 2009Alvarado et al, 1997;Hauff et al, 2000;Hoernle et al, 2004: Madrigal et al, 2016 87Sr/86Sr on Inoceramus (Flores et al, 2003a;Weber, 2013) Radiolaria (this study) Nicoya Complex on the basis of plateau geochemistry alone.…”

Section: The Manzanillo Terranementioning

confidence: 99%

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Rapid vertical motions and formation of volcanic arc gaps: Plateau collision recorded in the forearc geological evolution (Costa Rica margin)

2018

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The collision of bathymetric features with modern convergent margins has been investigated with the full range of tools used in geosciences. Hence, a comprehensive picture exists of the characteristic effects of collision events on the evolution of convergent margins. In contrast, much less studies documented past collisions of bathymetric features with convergent margins, as colliding features were generally lost to subduction. The arc-trench system of southern Central America provides modern and past textbook examples of active margin interaction with incoming bathymetric reliefs. Here, we propose a synthesis which combines basin and terrane analysis of the forearc of northern Costa Rica and takes up the challenge of documenting past episodes of plateau accretion to the active margin. As illustrated in modern examples, our study shows that kilometric uplift of the overriding plate and termination of the volcanic arc activity are the most profound effects of colliding/accreting oceanic plateaus. Kilometric uplift of the forearc is documented by short-lived (ca. 3 m.y.) occurrences of shallow-water deposits in an overall deep-water forearc record. These shallow deposits contain material reworked from underlying sedimentary and basement lithologies. The development of spatial gaps in arc volcanism is deduced from the transition from arcderived turbidites to pelagic sediments. Eventually, end of the collision event is evidenced by the subsidence of the whole forearc to deep-water environments.Basin subsidence is accompanied or followed by renewed volcanic arc activity and coeval arc-derived sedimentation, which may occur 1-7 m.y. after plateau collision. These past episodes of plateau accretion are archetypal for the following reasons: (a) they may be studied in outcrop, whereas most of the modern collisions of plateaus largely occur underwater; (b) no tectonic or metamorphic imprint has significantly complicated the forearc geological record; (c) the colliding feature and the sedimentary response to its collision are both preserved in the forearc geology; (d) they may be used as analogues for any setting where a bathymetric feature is suspected to have caused rapid forearc uplift and cessation of the volcanic arc activity.---

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Section: Introductionmentioning

confidence: 58%

Section: The Manzanillo Terranementioning

confidence: 76%

Section: Oceanic Plateau Occurrences In the Caribbean Platementioning

confidence: 99%

Section: The Manzanillo Terranementioning

confidence: 99%

Section: The Manzanillo Terranementioning

confidence: 99%

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Rapid vertical motions and formation of volcanic arc gaps: Plateau collision recorded in the forearc geological evolution (Costa Rica margin)

2018

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Connecting the Deep Earth and the Atmosphere

Torsvik

Svensen

Steinberger

et al. 2021

Geophysical Monograph Series

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Most hotspots, kimberlites, and large igneous provinces (LIPs) are sourced by plumes that rise from the margins of two large low shear-wave velocity provinces in the lowermost mantle. These thermochemical provinces have likely been quasi-stable for hundreds of millions, perhaps billions of years, and plume heads rise through the mantle in about 30 Myr or less. LIPs provide a direct link between the deep Earth and the atmosphere but environmental consequences depend on both their volumes and the composition of the crustal rocks they are emplaced through. LIP activity can alter the plate tectonic setting by creating and modifying plate boundaries and hence changing the paleogeography and its long-term forcing on climate.Extensive blankets of LIP-lava on the Earth's surface can also enhance silicate weathering and potentially lead to CO2 drawdown (cooling), but we find no clear relationship between LIPs and post-emplacement variation in atmospheric CO2 proxies on very long (>10 Myrs) timescales.Subduction is a key driving force behind plate tectonics but also a key driver for the long-term climate evolution through arc volcanism and degassing of CO2. Subduction fluxes derived from full-plate models provide a powerful way of estimating plate tectonic CO2 degassing (sourcing) and correlate well with zircon age frequency distributions through time. This suggest that continental arc activity may have played an important role in regulating long-term climate change (greenhouse vs. icehouse conditions) but only the Permo-Carboniferous icehouse (~330-275 Ma) show a clear correlation with the zircon record.

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The strength of the Earth's magnetic field and the Cretaceous Normal Superchron: New data from Costa Rica

Chiara

Tauxe

Florindo

et al. 2020

Preprint

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From the analysis of satellite data, a rapid decrease of the present-day Earth's magnetic (geomagnetic) field strength (intensity) is observed, thus raising the question of whether Earth is currently approaching a polarity reversal (e.g., Hulot et al., 2002; Pavón-Carrasco & De Santis, 2016) or not (Brown et al., 2018). Constraining the past evolution of intensity (paleointensity) can provide context for this scenario and help us to understand fundamental properties of the geomagnetic field, such as the long-term average dipole moment and how the field's strength is related to polarity reversals, reversal frequency and secular variation (e.g., Cox, 1968).Generally, paleointensity minima are associated with magnetic excursions and reversals but they are not always associated with these events (Channell et al., 2020). Identifying a relationship between dipole strength

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Record of massive upwellings from the Pacific large low shear velocity province

Cited by 42 publications

References 82 publications

Rapid vertical motions and formation of volcanic arc gaps: Plateau collision recorded in the forearc geological evolution (Costa Rica margin)

Rapid vertical motions and formation of volcanic arc gaps: Plateau collision recorded in the forearc geological evolution (Costa Rica margin)

Connecting the Deep Earth and the Atmosphere

The strength of the Earth's magnetic field and the Cretaceous Normal Superchron: New data from Costa Rica

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