Upper Triassic Barranca Group; Nonmarine and shallow-marine rift-basin deposits of northwestern Mexico

Stewart, John H.; Roldán-Quintana, Jaime

doi:10.1130/spe254-p19

Cited by 30 publications

(32 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Terrane accretion in the Permo-Triassic produced the "Sonoran orogeny" of Poole (1993). As indicated in Figure 1, the Barranca Group may overlap a zone formed by the accretion of a eugeoclinal and a miogeoclinal terrane (Stewart and Roldán-Quintana, 1991). West of Sonora, younger tectonic events that resulted in the accretion of Jurassic volcanic arcs and built up an Early Cretaceous volcanic arc were responsible for the construction of the main body of the central and western Baja California Peninsula.…”

Section: Introductionmentioning

confidence: 98%

“…Known outcrops (in black) of Antimonio terrane rocks in Sonora: (1) Sierra del Alamo, (2) Cerro Basura, (3) Cerro La Jojoba, (4) Sierra Santa Rosa, (5) Cerro Caracahui, (6) Sierrita de López, (7) Sierra Santa Teresa near Hermosillo (H), and (8) Barra los Tanques. Also indicated are locations of Mesozoic strata in the Pilot Mountains (A), Union District (B), Gabbs Valley Range (C) in Nevada, and rift deposits of the Barranca Group in central Sonora shown as horizontal lines (Stewart and Roldán-Quintana, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…In central Sonora, Upper Triassic deposits of the Barranca Group are interpreted as early Mesozoic continental rift basins that unconformably overlie Ordovician to Permian eugeoclinal strata and contain clasts derived from nearby miogeoclinal strata (Stewart and Roldán-Quintana, 1991). Terrane accretion in the Permo-Triassic produced the "Sonoran orogeny" of Poole (1993).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Paleogeographic and tectonic implications of Triassic fossils and strata from the Antimonio Formation, northwestern Sonora

Stanley¹,

González–León²

1995

Special Paper 301: Studies on the Mesozoic of Sonora and Adjacent Areas

View full text Add to dashboard Cite

Within the Sierra del Alamo of northwestern Sonora, the 3.4-km-thick AntimonioFormation contains a very extensive Upper Triassic to Lower Jurassic stratigraphic succession. It also includes in its middle part a fairly complete marine transition from uppermost Triassic to Lower Jurassic rocks. In this region of southwestern North America, several tectonostratigraphic terranes are associated with a continental volcanic-arc system. Some of these terranes have been tectonically juxtaposed against the truncated edge of the craton. The thick Upper Triassic to Lower Jurassic sedimentary sequence of the Antimonio Formation in northwestern Sonora reveals paleontologic and stratigraphic detail bearing directly on the tectonic and paleogeographic evolution along the edge of cratonal North America.An Upper Triassic (Norian) shallow-water, tropical to subtropical, reeflike invertebrate fauna was recently discovered within biostromal limestone in the lower member of the Antimonio Formation. This Norian fauna adds new information concerning paleogeographic reconstructions. It contains 33 taxa of microcoprolites, calcareous sponges, corals, the spherical hydrozoan Heterastridium, spongiomorphs, disjectoporoids, brachiopods, ammonoids, bivalves and gastropods. Eighteen of these occur together in the Mesozoic Great Basin marine province of Nevada and the general composition of the fauna of the Antimonio terrane is unlike that of other North American terranes. Four taxa are endemic to Sonora and are not known from any other region. In addition, seven Sonoran taxa also occur in Peru and eighteen are documented from the western region of the Tethys. A few species occur in the Stikine and the Eastern Klamath terranes. In addition to the faunal elements there are stratigraphic similarities between Nevada and Sonora. Stratigraphic thicknesses, lithofacies, the succession and timing of the lithofacies, and tectonic histories of both regions compare favorably.To explain tectonic, stratigraphic, and paleontologic similarities between Nevada and northwestern Sonora, we propose a tectonic model of left-lateral transcurrent faulting along the North American craton. Displacement probably occurred during Middle to Late Jurassic time. As much as 1,000 km of left-lateral displacement along the edge of the Mesozoic craton of North America is necessary to account for the present positions of rock in Nevada and Sonora. The Mojave-Sonora megashear is one fault system that could have been responsible for the southward movement of rocks from the northwestern Great Basin into present-day positions in northwestern Sonora.

show abstract

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Paleogeographic and tectonic implications of Triassic fossils and strata from the Antimonio Formation, northwestern Sonora

Stanley¹,

González–León²

1995

Special Paper 301: Studies on the Mesozoic of Sonora and Adjacent Areas

View full text Add to dashboard Cite

show abstract

“…Therefore, the development of basins and volcanism in central Sonora during the Triassic (Stewart and Roldán, 1991) and, later, the development of volcanism and the opening of basins during the Early and Middle Jurassic (Anderson and Nourse, 2005) mark an evolution associated with extension in a possibly thinned and warmed lithosphere. The sedimentation in the Upper Jurassic-Lower Cretaceous and Upper Cretaceous occurred under an extension environment, and indicates the completion of the evolution of the Mesozoic basins that occurred before a period of stability and peneplanation in the Upper CretaceousPaleocene in north-west Sonora.…”

Section: Discussionmentioning

confidence: 97%

Mesozoic gliding and Tertiary basin and range tectonics in eastern Sonora, Mexico

Castañeda

Quintana

Rivera

2015

Geofísica Internacional

View full text Add to dashboard Cite

data suggest that the monoliths and blocks may have originated at a positive land east of Arivechi, in western Chihuahua and eastern Sonora, Mexico, known as the Aldama Platform. normal faults. Fold vergence suggests that the depocenter was located westward of the study area. A paleostress reconstruction documented the tectonic history of the eastern margin of the Arivechi back-arc basin. Stress inversion of fault slip data was achieved by an improved right-dihedra method followed by rotational optimization. The structural analysis and paleostress reconstructions showed that the Mesozoic-Cenozoic kinematic evolution was extensional and continued during Cretaceous basin and range-type normal faulting, as suggested by our paleostress reconstruction. The last event is the result of the beginning of tectonic extension at the onset of the shift from a subduction regime toward a transform fault regime, i.e., from the subduction of the Fallaron plate to the San Andreas Gulf of California fault system during Miocene times. NE-SW and ENE-WSW extension was followed by E-W and WNW-ESE extension. The faulting sequence went from NE-SW to ENE-WSW and subsequently to WNW-ESE. AbstractComplex deformational structures assigned to vertical movements, and gravitational activity, such as gliding, are well preserved in Upper Cretaceous rocks of the Arivechi region, Eastern Sonora, Mexico. These structures allow us to discriminate between synsedimentary and tectonic origins. The rocks at Arivechi have been divided into two units according to their lithology and degree of deformation, the Cañada de Tarachi (oldest) and El Potrero Grande units. The Upper Cretaceous volcanosedimentary sequence is more than 6 km thick and consists mainly of andesite, rhyolithic tuff, conglomerate sandstone, siltstone, and shale-type rocks that were deposited in the Arivechi back-arc basin. Within the Cañada de Tarachi Unit, monoliths and blocks were found; these include rocks dating from Proterozoic, Paleozoic and Mesozoic times. The Proterozoic monoliths are dominated by quartz sandstone and dolomite and the Paleozoic and Mesozoic monoliths consist of limestone, shale, limestone-shale-sandstone, conglomerate and igneous rocks. Two granitic monoliths have been dated, one at 76 Ma (U/Pb zircon date) and the other at 70 Ma ( 40 Ar/ 39 Ar whole rock step-heating). The sedimentary monoliths show gradational transitions from coherent beds to intense deformation along their edges and bases. The structure within the monoliths, blocks and surrounding host rocks was studied in detail. The new stratigraphic and structural

show abstract

“…Eugeoclinal deep basin rocks, consisting of siliceous sediments, sandstones, carbonaceous shales and barite layers, ranging from the Ordovician to Lower Permian, are present in central Sonora (Poole et al, 1991(Poole et al, , 2005, between the 28º 00' N and 28º 30' N. These eugeoclinal sequences are considered as allochthonous and overthrusted over the miogeoclinal rocks during the Late Permian-Triassic time (Poole et al, 2005). A Mesozoic sequence (continental or deltaic sandstone and carbonaceous shale including some coal layers) was deposited unconformably (Barranca Formation) over the allochthonous rocks (Wilson and Rocha, 1949;Alencaster-De Cserna, 1961;Stewart et al, 1991). In the Caborca region (at El Antimonio area), the Triassic-Jurassic sedimentary rocks exhibit marine signature and were deposited over paleozoic platform rocks (White and Guiza, 1949;González-León, 1997;González-León et al, 2005).…”

Section: The Pre-laramide Substratummentioning

confidence: 99%

Genetic implications of new Sr and Nd isotopic data of the intrusive rocks from the Laramide Arc in Northern Sonora, Mexico.

Pérez-Segura

Gonzáléz-Partida²,

Roldán-Quintana

2013

Journal of Iberian Geology

View full text Add to dashboard Cite

The Laramide Intrusive Arc constitutes a wide intrusive belt broadly parallel to the actual Sonora coastline. It was formed by the subduction of the Farallon Plate beneath the North-American Plate during the Late Cretaceous-Early Tertiary period. New isotopic data on rocks of this arc show initial 87 Sr/ 86 Sr and eNd isotopic values of 0.7066 to 0.7070 and -5 to -6, respectively, for two samples from Bacanora area; as well as 0.7074 to 0.7081 and -3 to -5.5 respectively, for five samples from Cananea, Mariquita and La Caridad areas. Isotopic ages were determined by U/Pb in zircons (95 Ma) and Ar/Ar in potassic feldspar (56 to 71 Ma) from a quartz monzonite porphyry, and by Ar/Ar in potassic feldspar (56 Ma) from another plutonic granodiorite, both from Bacanora. Initial 87 Sr/ 86 Sr and eNd values for samples reported in this study suggest that the Laramidic magmas had a large influence from the Proterozoic basement in northeastern Sonora. Four different isotopic zones are proposed for Sonora, according with Sr-Nd data of laramidic rocks and the substratum intruded.

show abstract

Upper Triassic Barranca Group; Nonmarine and shallow-marine rift-basin deposits of northwestern Mexico

Cited by 30 publications

References 0 publications

Paleogeographic and tectonic implications of Triassic fossils and strata from the Antimonio Formation, northwestern Sonora

Paleogeographic and tectonic implications of Triassic fossils and strata from the Antimonio Formation, northwestern Sonora

Mesozoic gliding and Tertiary basin and range tectonics in eastern Sonora, Mexico

Genetic implications of new Sr and Nd isotopic data of the intrusive rocks from the Laramide Arc in Northern Sonora, Mexico.

Contact Info

Product

Resources

About