The Yucatan, a Laurentian or Gondwanan fragment? Geophysical and palinspastic constraints

Keppie, D. Fraser; Keppie, J. Duncan

doi:10.1007/s00531-013-0953-x

Cited by 5 publications

(3 citation statements)

References 48 publications

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“…Permian (e.g., Dickinson and Lawton, 2001). In paleotectonic models, it has been suggested that the Maya Block: (1) has a pre-Mesozoic Gondwanan affinity (e.g., Pindell et al, 1988;Pindell and Kennan, 2009;Weber et al, 2009), ( 2) is a peri-Gondwanan arc-related terrane formed either prior to the opening of the Iapetus Ocean (Keppie et al, 2011) or more controversially, (3) is a rifted Laurentian basement block (Keppie and Keppie, 2014). In particular, the nature and origin…”

Section: Geologic Settingmentioning

confidence: 99%

“…After the Carboniferous arc magmatism, plate reconstruction models show that the Maya Block fits tightly against the SE margin of Laurentia and the NW part of Gondwana in the Early Permian (Pindell and Dewey, 1982;Ross and Scotese, 1988;Viele and Thomas, 1989;Dickinson and Lawton, 2001;Seton et al, 2012;Keppie and Keppie, 2014;Fig. 11).…”

Section: Continental Arc Magmatism Produced By Rheic Ocean Subductionmentioning

confidence: 99%

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Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

et al. 2021

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Determining the nature and age of the 200-km-wide Chicxulub impact target rock is an essential step in advancing our understanding of the Maya Block basement. Few age constraints exist for the northern Maya Block crust, specifically the basement underlying the 66 Ma, 200 km-wide Chicxulub impact structure. The International Ocean Discovery Program-International Continental Scientific Drilling Program Expedition 364 core recovered a continuous section of basement rocks from the Chicxulub target rocks, which provides a unique opportunity to illuminate the pre-impact tectonic evolution of a terrane key to the development of the Gulf of Mexico. Sparse published ages for the Maya Block point to Mesoproterozoic, Ediacaran, Ordovician to Devonian crust are consistent with plate reconstruction models. In contrast, granitic basement recovered from the Chicxulub peak ring during Expedition 364 yielded new zircon U-Pb laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) concordant dates clustering around 334 ± 2.3 Ma. Zircon rare earth element (REE) chemistry is consistent with the granitoids having formed in a continental arc setting. Inherited zircon grains fall into three groups: 400−435 Ma, 500−635 Ma, and 940−1400 Ma, which are consistent with the incorporation of Peri-Gondwanan, Pan-African, and Grenvillian crust, respectively. Carboniferous U-Pb ages, trace element compositions, and inherited zircon grains indicate a pre-collisional continental volcanic arc located along the Maya Block’s northern margin before NW Gondwana collided with Laurentia. The existence of a continental arc along NW Gondwana suggests southward-directed subduction of Rheic oceanic crust beneath the Maya Block and is similar to evidence for a continental arc along the northern margin of Gondwana that is documented in the Suwannee terrane, Florida, USA, and Coahuila Block of NE México.

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Section: Geologic Settingmentioning

confidence: 99%

Section: Continental Arc Magmatism Produced By Rheic Ocean Subductionmentioning

confidence: 99%

Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

et al. 2021

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“…This is the case in the northern GoM, where the gravity signal of thick salt and sediment deposits overprint that of the underlying crust. Based on the Jurassic age (Bajocian to Oxfordian) of this salt (Pindell et al, 2020) and the Late Jurassic-Cretaceous age of later sediments (e.g., Galloway, 2008;Snedden et al, 2015;Lin et al, 2019), previous evolution models considered that the GoM started to open during the Jurassic (Carey, 1958;Bullard et al, 1965;Pindell and Dewey, 1982;Hall et al, 1982;Schlager et al, 1984, Buffler andSawyer, 1985; Ross and Scotese, 1988; Keppie and Keppie, 2014). The counter-clockwise rotation of the Yucatán Block (e.g., Pindell and Dewey, 1982;Marton and Buffer, 1994) is confirmed by paleomagnetic results (e.g., Molina-Garza et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Structure, age, and tectonic evolution of the Gulf of Mexico

Garcia-Reyes

Dyment

2022

Earth and Planetary Science Letters

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The Gulf of Mexico is an isolated oceanic basin whose nature, structure and age are not fully elucidated, mostly because seafloor spreading isochrons have not been identified in this basin so far. We compiled and processed all publicly available marine magnetic data to produce a new magnetic anomaly map of the Gulf of Mexico. This map reveals a fan-like set of intermediate-wavelength (>100 km) magnetic anomalies related to seafloor spreading. Our magnetic anomaly-based plate reconstructions (1) support a counterclockwise rotation of the Yucatán Block around a pole located NW of Cuba, (2) accommodate the fracture zone trends depicted by the gravity data, and (3) suggest that the Continent-Ocean Boundary lies immediately south of the Houston magnetic anomaly, close to the shoreline, implying that oceanic crust underlies a significant part of the Sigsbee salt province. Our attempt to identify the intermediate wavelength anomalies by comparison with filtered Geomagnetic Polarity Time Scales dates the onset of seafloor spreading before the Tithonian (>150 Ma) and its cessation at the Berriasian (140 Ma).

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The pre-Mesozoic metamorphic basement of Mexico, 1.5 billion years of crustal evolution

Ortega-Gutiérrez

Elı́as-Herrera

Morán-Zenteno

et al. 2018

Earth-Science Reviews

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The Yucatan, a Laurentian or Gondwanan fragment? Geophysical and palinspastic constraints

Cited by 5 publications

References 48 publications

Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

Evidence of Carboniferous arc magmatism preserved in the Chicxulub impact structure

Structure, age, and tectonic evolution of the Gulf of Mexico

The pre-Mesozoic metamorphic basement of Mexico, 1.5 billion years of crustal evolution

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