Three-dimensional gravity modeling of Chicxulub Crater structure, constrained with marine seismic data and land boreholes

Batista-Rodríguez, José A.; Pérez-Flores, M. A.; Urrutia‐Fucugauchi, J.

doi:10.5047/eps.2013.05.015

Cited by 11 publications

(3 citation statements)

References 27 publications

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“…The regional environmental effects of the impact were catastrophic, producing sufficient thermal radiation to ignite vegetation 1000 to 1500 km from the impact site (Shuvalov and Artemieva 2002). Immediately after the impact, a transient excavation cavity reached $25 km depth, followed by crustal rebound and central basement uplift (Batista-Rodr ıguez et al 2013). The peak ring of the Chicxulub crater was formed from uplifted, shocked, felsic basement rocks (Morgan et al 2016), and created a circular topographic high within the crater (Figure 1).…”

Section: The Chicxulub Impact Cratermentioning

confidence: 99%

Palynology from ground zero of the Chicxulub impact, southern Gulf of Mexico

et al. 2020

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Palynological analysis of Site M0077A in the Chicxulub impact crater has yielded a record of the immediate Cretaceous/Paleogene (K/Pg) recovery from ground zero of the end-Cretaceous mass extinction, followed by a record of the Paleocene-Eocene Thermal Maximum (PETM) and later Ypresian (Eocene), including the Early Eocene Climatic Optimum (EECO). Eight specimens of the dinoflagellate cyst Trithyrodinium evittii have been observed near the base of the K/Pg transitional unit; these likely represent a post-impact dinoflagellate disaster recovery assemblage deposited within several days following the impact, although the possibility that some or all of the T. evittii specimens are reworked Maastrichtian cysts cannot be fully excluded. Despite high-resolution sampling of the lowermost Paleocene successions, the oldest identifiable terrestrial palynomorphs observed in the Site M0077A core, two specimens of Deltoidospora fern spores, occur at least $200,000 years after the impact. Other than these occurrences, the Paleocene section is nearly barren in terms of palynomorphs, likely a result of poor preservation of organic material combined with a long recovery time for vegetation in the vicinity of the crater. Pollen and fungal spore concentrations spike in an anoxic dark shale deposited during the PETM around 56 Ma, with a diverse pollen assemblage indicating the presence of a coastal shrubby tropical forest in the geographic vicinity, likely in the Yucat an Peninsula to the south. In the marine realm, this interval is characterized by thermophilic assemblages of dinoflagellate cysts. Stratigraphically constrained cluster analysis identified four statistically robust sample clusters in the lower Eocene successions, with Malvacipollis spp. and Milfordia spp. abundances driving the highest average dissimilarity between clusters. A second notable spike in palynological concentrations above the PETM section may represent another early Eocene hyperthermal event. Pollen and plant spore concentrations generally increased during the EECO, associated with increases in terrestrial input during basin infilling.

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Section: The Chicxulub Impact Cratermentioning

confidence: 99%

Palynology from ground zero of the Chicxulub impact, southern Gulf of Mexico

et al. 2020

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“…Gravity method is a non-ruinous geophysical procedure that measures contrasts in the gravitational field of the earth at many various areas. It has much beneficial utilization in hydrocarbon exploration, mineral prospecting, archeological investigations, environmental applications and crustal imaging [1][2][3][4][5][6][7][8][9][10][11]. The main objective of the gravity interpretation is evaluating the model parameters (depth, amplitude coefficient, origin location, and shape parameter) of gravity oddities delivered by basic geometrical formed structures (spheres, cylinders).…”

Section: Introductionmentioning

confidence: 99%

Gravity Data Interpretation Using Different New Algorithms: A Comparative Study

Essa¹,

Elhussein²

2018

Gravity - Geoscience Applications, Industrial Technology and Quantum Aspect

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Gravity data interpretation is useful in exploring regions that have different geological structures, which contain minerals, ores and oil deposits. There are different numerical methods for the model parameters (depth (z), origin location (x o ), shape parameter (q) and amplitude coefficient (A)) evaluation of a covered structure such as gradient method, particle swarm optimization technique and Werner deconvolution method. In this study, application of these methods is utilized to appraise the model parametric quantity of the covered structures. The application of these methods was demonstrated by different engineered data without and with various range of noise (5%, 10%) and applied for a real example from Egypt. The result values of each method were compared together and with those published and drilling information.

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“…Gravity and magnetic methods have many successful applications in mineral prospecting, environmental applications, and crustal imaging (e.g., Abdelrahman et al 1989;Ateya and Takemoto 2002;Batista-Rodríguez et al 2013;Beiki and Pedersen 2011;Fedi 2007;Hinze 1990;Hinze et al 2013;LaFehr and Nabighian 2012;Long and Kaufmann 2013;Mehanee 2014a;Nettleton 1976;Okubo et al 2013;Paoletti et al 2013;Pei et al 2014).…”

Section: Introductionmentioning

confidence: 99%

2.5D regularized inversion for the interpretation of residual gravity data by a dipping thin sheet: numerical examples and case studies with an insight on sensitivity and non-uniqueness

Mehanee

Essa

2015

Earth Planet Sp

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A new two-and-a-half dimensional (2.5D) regularized inversion scheme has been developed for the interpretation of residual gravity data by a dipping thin-sheet model. This scheme solves for the characteristic inverse parameters (depth to top z, dip angle θ , extension in depth L, strike length 2 Y, and amplitude coefficient A) of a model in the space of logarithms of these parameters (log(z), log(θ ), log(L), log(Y), and log(|A|)). The developed method has been successfully verified on synthetic examples without noise. The method is found stable and can estimate the inverse parameters of the buried target with acceptable accuracy when applied to data contaminated with various noise levels. However, some of the inverse parameters encountered some inaccuracy when the method was applied to synthetic data distorted by significant neighboring gravity effects/interferences. The validity of this method for practical applications has been successfully illustrated on two field examples with diverse geologic settings from mineral exploration. The estimated inverse parameters of the real data investigated are found to generally conform well with those yielded from drilling. The method is shown to be highly applicable for mineral prospecting and reconnaissance studies. It is capable of extracting the various characteristic inverse parameters that are of geologic and economic significance, and is of particular value in cases where the residual gravity data set is due to an isolated thinsheet type buried target. The sensitivity analysis carried out on the Jacobian matrices of the field examples investigated here has shown that the parameter that can be determined with the superior accuracy is θ (as confirmed from drilling information). The parameters z, L, Y, and A can be estimated with acceptable accuracy, especially the parameters z and A. This inverse problem is non-unique. The non-uniqueness analysis and the tabulated inverse results presented here have shown that the parameters most affected by the non-uniqueness are L and Y. It has also been shown that the new scheme developed here is advantageous in terms of computational efficiency, stability and convergence than the existing gravity data inversion schemes that solve for the characteristic inverse parameters of a sheet/dike.

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Three-dimensional gravity modeling of Chicxulub Crater structure, constrained with marine seismic data and land boreholes

Cited by 11 publications

References 27 publications

Palynology from ground zero of the Chicxulub impact, southern Gulf of Mexico

Palynology from ground zero of the Chicxulub impact, southern Gulf of Mexico

Gravity Data Interpretation Using Different New Algorithms: A Comparative Study

2.5D regularized inversion for the interpretation of residual gravity data by a dipping thin sheet: numerical examples and case studies with an insight on sensitivity and non-uniqueness

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