Ammonite biostratigraphy, lithofacies variations, and paleoceanographic implications for barremian-aptian sequences of northeastern Mexico

Barragán, Ricardo

doi:10.25148/etd.fi14050434

Cited by 3 publications

(6 citation statements)

References 22 publications

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“…The patterns of occurrence/disappearance of the benthic fauna (Barragan, 2000;Barragan and Maurrasse, 2000) further corroborate the anoxic conditions coincident with OAE 1b.…”

Section: Introductionsupporting

confidence: 54%

“…As for plausible causes of such unusual preservation of Corganic-rich compounds in the lower Aptian (OAE 1b) of the La Peña Formation of northeastern Mexico, Barragan (2000) and Barragan and Maurrasse (2000) proposed that oxygen depletion caused an enhancement of the oxygen minimum zone due to an increase in oceanic water temperature related to tectonovolcanic effects associated with the Pacific super-plume events, which produced excess heat flux at that time. Their interpretation is compatible with Tatsumi et al, (1998) inference that elevated temperatures, as well as changes in ocean chemistry, oceanic circulation and sea level, were all factors that played a major role in oxygen depletion events during the mid-Cretaceous hypoxic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Paleoenvironmental Implications of the Indidura Formation (Cenomanian/Turonian), Northeastern Mexico: a High Resolution Stratigraphic Study

Duque-Botero¹

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“…The patterns of occurrence/disappearance of the benthic fauna (Barragan, 2000;Barragan and Maurrasse, 2000) further corroborate the anoxic conditions coincident with OAE 1b.…”

Section: Introductionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Paleoenvironmental Implications of the Indidura Formation (Cenomanian/Turonian), Northeastern Mexico: a High Resolution Stratigraphic Study

Duque-Botero¹

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“…At these locations the facies of this unit developed different characteristics that allowed Imlay to divide it into two members: the lower La Peña composed by around 430 m-thick limestones ranging between 9 to 18 m-thick, and the upper member composed by a 15 to 24 m-thick argillaceous beds. Humphrey (1949), redefined Imlay's La Peña Formation, delimiting it to "the lithologically distinct unit of marls, shaly limestones, and shales which carries a late Aptian fauna and which is extensive throughout northern Mexico", therefore, the Humphrey's redefinition of La Peña Formation is analogous to Imlay's original upper member of the La Peña (Barragán, 2000). The facies of this unit in the study area exhibit stratigraphical and geochemical variations attractive for the oil industry.…”

Section: La Peña Formationmentioning

confidence: 96%

Organic richness and source rock potential of the La Peña Formation in the Sabinas and Piedras Negras basins, NE of Mexico

Ortiz-Treviño,

Camacho-Ortegón,

Enciso-Cárdenas

et al. 2023

revmexcg

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This paper investigates the petroleum generation potential of the Lower Cretaceous organic-rich rocks of the La Peña Formation in the Sabinas and Piedras Negras Basin (SB-PNB) of northeastern Mexico. In order to provide insights into the source rock potential of this unit, a total of 25 cutting samples collected from 15 wells at different stratigraphic intervals along the study area were analysed using Rock-Eval Pyrolysis technique. The analytical results revealed that all the analysed samples can be described as hydrogen-poor organic matter with HI <200 mg HC/g TOC. The organic richness indicates a poor to excellent Total Organic Carbon content suggesting that existed different conditions during the deposition and burial of this unit, causing variable organic matter production and preservation. Also, the results revealed a variation in the kerogen types that may be attributed to the relative stratigraphic positions of the selected samples in the wells. With respect to the organic matter thermal maturity, given by the geographical distribution of the Tmax values, the mature and overmature zone (435–508 °C) correspond to the Sabinas basin (SB). Overall, these results show a variability in the organic richness, thermal maturity and petroleum potential of the La Peña Formation, differentiating the values of the TOC content, petroleum potential and HI content for the samples from the Sabinas Basin and Piedras Negras Basin, respectively.

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“…Repositories: MONTERO, 1977;BARRAGÁN, 2000BARRAGÁN, , 2001BARRAGÁN & MAURRASSE, 2008), as an ammonite biozone for the uppermost lower Aptian of the La Peña Formation. They neither explained the reason for using the name Gargasiceras ?…”

Section: -Systematic Notes Of the Species 'Gargasiceras' Adkinsi Anmentioning

confidence: 99%

“…'G.' adkinsi has previously been misidentified as Rhy-tidoplites robertsi and Penaceras rursiradiatus (e.g., CANTÚ CHAPA, 1976;CONTRERAS Y MONTERO, 1977;BARRAGÁN, 2000BARRAGÁN, , 2001BARRAGÁN & MAURRASSE, 2008). In the "Systematic notes" (Section V) we address the taxonomic issues associated with 'Gargasiceras' adkinsi and Rhytidoplites robertsi.…”

Section: -Introductionmentioning

confidence: 99%

Lower Aptian ammonites of the Sierra de Parras, Coahuila State, northern Mexico

Ovando-Figueroa¹

2015

Carnets Geol.

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We report an interesting Aptian ammonite record from the La Peña Formation in the Sierra de Parras, Coahuila State. This assemblage is analyzed from a paleoecological perspective. It contains the first reported occurrence of a macroconch of Dufrenoyia from Mexico, and the largest known specimen of 'Gargasiceras' adkinsi. Such an assemblage yielding large ammonites is unusual in deposits of this age in Mexico. To properly document this ammonite record, we review 'Gargasiceras' adkinsi, formerly misidentified as Rhytidoplites robertsi, and allied taxa. From our analysis, we conclude that 'Gargasiceras' adkinsi exhibits strong intraspecific variability. We also analyze in detail the differences that exist between 'Gargasiceras' adkinsi and Rhytidoplites robertsi, and emend the concept of the genus Rhytidoplites. These revisions are important from a biostratigraphic point of view since 'Gargasiceras' adkinsi is an index species for the lower Aptian ammonite zonation of Mexico.

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Ammonite biostratigraphy, lithofacies variations, and paleoceanographic implications for barremian-aptian sequences of northeastern Mexico

Cited by 3 publications

References 22 publications

Paleoenvironmental Implications of the Indidura Formation (Cenomanian/Turonian), Northeastern Mexico: a High Resolution Stratigraphic Study

Paleoenvironmental Implications of the Indidura Formation (Cenomanian/Turonian), Northeastern Mexico: a High Resolution Stratigraphic Study

Organic richness and source rock potential of the La Peña Formation in the Sabinas and Piedras Negras basins, NE of Mexico

Lower Aptian ammonites of the Sierra de Parras, Coahuila State, northern Mexico

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