The middle America convergent plate boundary, Guatemala

Huene, Roland von

doi:10.1130/dnag-gna-n.535

Cited by 8 publications

(7 citation statements)

References 11 publications

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“…Similarly, we propose that the belt of mafic igneous rocks extending from Guatemala (von Huene, 1989) to the Nicoya Peninsula previously formed the forearc of the Chortis subduction zone (Hauff et al, 2000a), and that it is made up of accreted portions of oceanic plateaus and hotspot tracks formed in the Pacific. It has also been proposed that the Central, Western, and Pacific Cordilleras in northwest South America (Colombia and Ecuador) are also accreted Pacific terranes (Kerr et al, 1997) with ages extending to 123 Ma (Lapierre et al, 2000).…”

Section: Figure 4 Sr Nd and Pb Isotope Ratios At 90 Ma For 139-111mentioning

confidence: 94%

70 m.y. history (139–69 Ma) for the Caribbean large igneous province

Hoernle

Hauff

Bogaard

2004

Geol

157

160

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It is commonly accepted that large igneous provinces are formed through catastrophic volcanic events occurring over vast areas within a few million years at the initiation of hotspots (mantle plumes). New 40 Ar/ 39 Ar ages (111-139 Ma) and geochemical results from the Nicoya Peninsula, Costa Rica, extend the age range of volcanism in the Caribbean large igneous province to 70 m.y. (69-139 Ma). Our results are not consistent with the formation of this vast igneous province through a single plume head at the initiation of a mantle plume such as the Galápagos. Instead we propose that multiple oceanic intraplate igneous structures, such as plateaus and hotspot tracks, were accumulated through the subduction process. The igneous structures could be remnants of the earlier history of the Galápagos hotspot, making it one of the oldest active hotspots on Earth. Alternatively they could have been derived from several spatially distinct mantle-melting events that sampled similar source material, e.g., oceanic lithosphere of similar age.

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Section: Figure 4 Sr Nd and Pb Isotope Ratios At 90 Ma For 139-111mentioning

confidence: 94%

70 m.y. history (139–69 Ma) for the Caribbean large igneous province

Hoernle

Hauff

Bogaard

2004

Geol

157

160

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“…The MAT has a unique morphology showing a break near the Mexico-Guatemala border [32,161]. To the north of the Tehuantepec Ridge (TeR in Fig.…”

Section: Geology and Structuresmentioning

confidence: 99%

Continental Rift Setting for the Central Part of the Mexican Volcanic Belt: A Statistical Approach

Verma¹

2009

TOGEOJ

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I prepared compilations of geochemical data from the central part of the Mexican Volcanic Belt (C-MVB), the Central American Volcanic Arc (CAVA) from Guatemala to northwestern Costa Rica, the continental arc of the Andes in South America, other mostly island arcs, extensional and continental break-up regions, and continental rifts. Using quantitative statistical methods, the origin of the C-MVB is constrained as a continental rift. Specifically, this continental rift setting for the C-MVB is inferred from conventional bivariate discrimination diagrams, new natural logarithmtransformed correct statistics-based discriminant function diagrams, quantitative Nb/Nb* parameter, and 99% confidence limits of the mean for the ratios of slab-or continental crust-sensitive and mantle-sensitive parameters. The subductionrelated models based on qualitative interpretations most commonly proposed for the Mexican Volcanic Belt in the literature are not supported from these robust quantitative constraints. All geological, structural, geochemical, isotopic (Sr, Nd, Pb, Os, and Be), and geophysical data are in fact consistent with this statistics-based conclusion of the continental rift setting and exclude involvement of the subducted slab from the genesis of the C-MVB magmas.

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“…However, the tectonic history was poorly constrained. These studies, together with seismic and bathymetric data (Moore et al, 1986), characterized the Guatemalan margin as subducting trench sediment, and the uppermost slope being uplifted because of compressional deformation, limited underplating, or strike-slip transport (Moore et al, 1986;von Huene, 1989). In this paper we report an analysis of the Guatemalan margin vertical movement history, the best proxy, in the absence of modern seismic profiles, for infering subduction erosion, in analogy with the nearby Costa Rica margin (Vannucchi et al, 2001(Vannucchi et al, , 2003.…”

Section: Introductionmentioning

confidence: 92%

Long-term subduction-erosion along the Guatemalan margin of the Middle America Trench

Vannucchi

Galeotti

Clift

et al. 2004

Geol

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A new analysis of Deep Sea Drilling Project (DSDP) Leg 84 data demonstrates that the dominant process controlling the Guatemala margin tectonic evolution since ca. 25 Ma is subduction-erosion. Data from benthic foraminifera, assemblages from upper-slope DSDP Sites 568, 569, and 570 indicate long-term, progressive subsidence from upper to middle bathyal depths (600-1000 m) ca. 19 Ma to modern abyssal depths (Ͼ2000 m). Rapid subsidence migrated landward starting at the Oligocene-Miocene boundary time under the current middle slope, where it increased sharply ca. 19 Ma, reached the current upper slope by ca. 15 Ma, and arrived at the uppermost slope ca. 2 Ma. Subsidence indicates crustal thinning by basal tectonic erosion of mass from the underside of the upper plate.Under the assumption that, in the Miocene, the morphology of the forearc was similar to that of today, landward migration of the trench was at a rate of 0.8-0.9 km/m.y. This linear rate corresponds to a tectonic erosion rate of the submerged forearc of 11.3-13.1 km 3 ·m.y. ؊1 ·km ؊1 . The evolution of arc magmatism and superfast spreading at the East Pacific Rise since early Miocene time may have caused slab shallowing and tectonic erosion that readjusted the forearc geometry.

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The middle America convergent plate boundary, Guatemala

Cited by 8 publications

References 11 publications

70 m.y. history (139–69 Ma) for the Caribbean large igneous province

70 m.y. history (139–69 Ma) for the Caribbean large igneous province

Continental Rift Setting for the Central Part of the Mexican Volcanic Belt: A Statistical Approach

Long-term subduction-erosion along the Guatemalan margin of the Middle America Trench

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