Fernando Ortega‐Gutiérrez

Universidad Nacional Autónoma de México

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Luigi Solari

Universidad Nacional Autónoma de México

J. Duncan Keppie

Universidad Nacional Autónoma de México

Mariano Elı́as-Herrera

Universidad Nacional Autónoma de México

Arturo Gómez‐Tuena

Universidad Nacional Autónoma de México

Carlos Ortega‐Obregón

Universidad Nacional Autónoma de México

Consuelo Macı́as-Romo

Universidad Nacional Autónoma de México

Amabel Ortega‐Rivera

Universidad Nacional Autónoma de México

Roberto Maldonado

Universidad Nacional Autónoma de México

Margarita Reyes‐Salas

Universidad Nacional Autónoma de México

Peter Schaaf

Universidad Nacional Autónoma de México

Cooperative Institutions

Universidad Nacional Autónoma de México

106

Autonomous University of Queretaro

Universidad Autónoma de la Ciudad de México

Universidad Autónoma del Estado de Morelos

Instituto Politécnico Nacional

University of Arizona

Center for Scientific Research and Higher Education at Ensenada

Instituto de Geociencias

Mexican Institute of Petroleum

University of Michigan–Ann Arbor

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THE PETROGENESIS OF EARLY–MIDDLE JURASSICMAGMATISM IN SOUTHERN AND CENTRAL MEXICO ANDITS ROLE DURING THE BREAK-UP OF WESTERN PANGAEA

Abstracts with programs - Geological Society of America (2023)

Mattia Parolari Michelangelo Martini Arturo Gómez Tuena Fernando Ortega‐Gutiérrez Carlos Errázuriz‐Henao

Petrogenesis

Pangaea

10.1130/abs/2023cd-386444

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A Paleozoic anorthosite massif related to rutile-bearing ilmenite ore deposits, south of the Polochic fault, Chiapas Massif Complex, Mexico

AGU Fall Meeting Abstracts (2013)

A. Cisneros Fernando Ortega‐Gutiérrez Bodo Weber Luigi Solari Peter Schaaf

Massif

Anorthosite

Ilmenite

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Detailed Description of Oil Shale Organic and Mineralogical Heterogeneity via Fourier Transform Infrared Microscopy

Energy & Fuels (2015)

Kathryn E. Washburn Justin E. Birdwell Michael S. Foster Fernando Ortega‐Gutiérrez

Mineralogical and geochemical information on reservoir and source rocks is necessary to assess and produce from petroleum systems. The standard methods in the petroleum industry for obtaining these properties are bulk measurements on homogenized, generally crushed, and pulverized rock samples and can take from hours to days to perform. New methods using Fourier transform infrared (FTIR) spectroscopy have been developed to more rapidly obtain information on mineralogy and geochemistry. However, these methods are also typically performed on bulk, homogenized samples. We present a new approach to rock sample characterization incorporating multivariate analysis and FTIR microscopy to provide non-destructive, spatially resolved mineralogy and geochemistry on whole rock samples. We are able to predict bulk mineralogy and organic carbon content within the same margin of error as standard characterization techniques, including X-ray diffraction (XRD) and total organic carbon (TOC) analysis. Validation of the method was performed using two oil shale samples from the Green River Formation in the Piceance Basin with differing sedimentary structures. One sample represents laminated Green River oil shales, and the other is representative of oil shale breccia. The FTIR microscopy results on the oil shales agree with XRD and LECO TOC data from the homogenized samples but also give additional detail regarding sample heterogeneity by providing information on the distribution of mineral phases and organic content. While measurements for this study were performed on oil shales, the method could also be applied to other geological samples, such as other mudrocks, complex carbonates, and soils.

10.1021/acs.energyfuels.5b00807

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Citations (46)

U-Pb zircon geochronology of Paleozoic units in Western and Central Guatemala: insights into the tectonic evolution of Middle America

AGU Spring Meeting Abstracts (2007)

Luigi Solari Fernando Ortega‐Gutiérrez Mariano Elías‐Herrera Peter Schaaf M. D. Norman

Geochronology

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Citations (7)

Gravity and magnetic survey of the Oaxaca city region: Cenozoic horst-and-graben structure superimposed on the Oaxaca–Juarez terrane boundary, southern Mexico

Journal of South American Earth Sciences (2009)

J. O. Campos‐Enríquez Salvador Isidro Belmonte‐Jiménez J. Duncan Keppie Fernando Ortega‐Gutiérrez Jorge A. Arzate

Horst

Half-graben

Transpression

Pull apart basin

Horst and graben

10.1016/j.jsames.2009.11.002

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Citations (11)

Hipótesis preliminar sobre la evolución magmática de las anortositas de la zona de Apanguito-Magdalena, Pluma Hidalgo, Oaxaca

Actas INAGEQ (1999)

C Schulze Fernando Ortega‐Gutiérrez

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Experimental chondrules by melting samples of olivine, clays and carbon with a CO2 laser

Boletín de la Sociedad Geológica Mexicana (2015)

K. E. Cervantes-de la Cruz Fernando Ortega‐Gutiérrez Jesús Solé Viñas Antígona Segura Peralta Margarita Adela Margarita Adela

Chondrules are the major constituents of chondritic meteorites; however, their origin is still an enigma for meteoritic science.In this work we report the results of melting minerals to experimentally generate objects similar to chondrules.The degree of fusion of olivine appears to be an important factor in determining the width of the bars in samples with barred-type olivine (BO) chondrules.On the other hand, the contribution of clays and carbon (possible precursor grains) is an important factor in those experiments where the melted samples showed porphyritic texture.

Chondrule

Carbon fibers

10.18268/bsgm2015v67n3a4

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The Chortis Block--southwestern Mexico connections: U-Pb zircon geochronology constraints

American Journal of Science (2012)

René León Luigi Solari Fernando Ortega‐Gutiérrez Uwe Martens

The proposed connections between basement terranes of southwestern México and the Chortís Block of Central America are tested in this paper, which focuses on metamorphic units in northern Chortís that outcrop in southeastern Guatemala. Two chief units are recognized: the mid- to high-metamorphic grade Las Ovejas Complex made up of ortho-, para-gneisses, schists, amphibolites and marbles; and the tectonically juxtaposed, low-metamorphic grade San Diego Phyllite. U-Pb geochronology carried out by LA-ICPMS on zircons separated from both units reveal major differences between them. The high-grade metamorphism and deformation of Las Ovejas Complex is bracketed between ∼27 and ∼37 Ma, which correspond to the U-Pb zircon ages of the oldest cross-cutting dikes and youngest zircons in metasedimentary samples. Las Ovejas samples share xenocrystic and detrital zircon populations of Middle-Late Jurassic, Middle-Late Triassic and Permo-Carboniferous age. In contrast, the San Diego Phyllite contains zircons that overlap at ∼830 to 870 and ∼1150 to 1220 Ma, with the youngest concordant zircons yielding Cambrian age. The contrast in population ages supports the idea that Las Ovejas Complex and San Diego Phyllite are different lithotectonic units tectonically juxtaposed during or after their exhumation. When compared with available U-Pb zircon data for southern México, Las Ovejas Complex show similarities to samples of the Guerrero terrane, mainly the Arteaga Complex and Zihuatanejo subterrane, as well as to the southern and northern portions of the Cuicateco terrane. The San Diego Phyllite shows instead similarities with the Teloloapan subterrane of the Guerrero terrane, the Mexcala Formation, the low-grade units of the Cuicateco terrane and the Grenvillian ages of the Oaxacan Complex metaigneous samples, as well as some of the samples belonging to the Maya Block. We propose a tectonic model in which the Las Ovejas Complex was a portion of a fringing arc located in front of the Cuicateco terrane of southwestern México, removed during the Early Tertiary by docking of the Chortís Block represented by the San Diego Phyllite, and tentatively by similar units recognized elsewhere in the Chortís Block in Honduras and Nicaragua. Eocene-Oligocene metamorphism and deformation of the Las Ovejas Complex would be a result of its displacement off southern México, mainly characterized by sinistral stretching and tectonic Cenozoic transport.

Phyllite

Geochronology

Basement

Allochthon

10.2475/03.2012.02

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Citations (38)

Tectonic Systems of Mexico: Origin and Evolution

Earth-Science Reviews (2018)

Fernando Ortega‐Gutiérrez Arturo Gómez‐Tuena

10.1016/j.earscirev.2018.06.002

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