La falla Chacalapa en el sur de Oaxaca

Tolson, Gustavo

doi:10.18268/bsgm2005v57n1a6

Cited by 49 publications

(21 citation statements)

References 13 publications

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“…Sinistral shear occurred along the northern margin of the eastern Xolapa complex between 29 and 24 Ma (Chacalapa shear zone, point 4 in Fig. 16l; Tolson 2005). Other sinistral transtensive deformation zones in southern Mexico outside the Xolapa complex are dated to between c. 37 and c. 27 Ma (points 1 and 3 in Fig.…”

Section: Late Eocene -Recent Eastward Displacement Of the Chortís Blockmentioning

confidence: 98%

“…Our sample was specifically taken to date low-T, high-strain mylonitic flow (c. 300 8C) along the Tierra Colorada (Riller et al 1992) or La Venta ) top-to-NW, sinistral-transtensional shear zone; synkinematic biotite is at 35 + 1 Ma. Sample ML-39, mylonitic gneiss at Pochutla, is from a narrow, late-stage shear zone in the regional Chacalapa shear zone along the northern edge of the eastern Xolapa complex; its major sinistral strike-slip stage is constrained at 29 -24 Ma (Tolson 2005;NietoSamaniego et al 2006). Our 15 + 2 Ma biotite age suggests reactivation, also indicated by faulting in the 29 + 1 Ma, post-mylonitic Pochutla granite (Herrmann et al 1994;Meschede et al 1996).…”

Section: Ar/ar and Rb -Sr Geochronologymentioning

confidence: 99%

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The North American-Caribbean Plate boundary in Mexico-Guatemala-Honduras

et al. 2009

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New structural, geochronological, and petrological data highlight which crustal sections of the North American–Caribbean Plate boundary in Guatemala and Honduras accommodated the large-scale sinistral offset. We develop the chronological and kinematic framework for these interactions and test for Palaeozoic to Recent geological correlations among the Maya Block, the Chortís Block, and the terranes of southern Mexico and the northern Caribbean. Our principal findings relate to how the North American–Caribbean Plate boundary partitioned deformation; whereas the southern Maya Block and the southern Chortís Block record the Late Cretaceous–Early Cenozoic collision and eastward sinistral translation of the Greater Antilles arc, the northern Chortís Block preserves evidence for northward stepping of the plate boundary with the translation of this block to its present position since the Late Eocene. Collision and translation are recorded in the ophiolite and subduction–accretion complex (North El Tambor complex), the continental margin (Rabinal and Chuacús complexes), and the Laramide foreland fold–thrust belt of the Maya Block as well as the overriding Greater Antilles arc complex. The Las Ovejas complex of the northern Chortís Block contains a significant part of the history of the eastward migration of the Chortís Block; it constitutes the southern part of the arc that facilitated the breakaway of the Chortís Block from the Xolapa complex of southern Mexico. While the Late Cretaceous collision is spectacularly sinistral transpressional, the Eocene–Recent translation of the Chortís Block is by sinistral wrenching with transtensional and transpressional episodes. Our reconstruction of the Late Mesozoic–Cenozoic evolution of the North American–Caribbean Plate boundary identified Proterozoic to Mesozoic connections among the southern Maya Block, the Chortís Block, and the terranes of southern Mexico: (i) in the Early–Middle Palaeozoic, the Acatlán complex of the southern Mexican Mixteca terrane, the Rabinal complex of the southern Maya Block, the Chuacús complex, and the Chortís Block were part of the Taconic–Acadian orogen along the northern margin of South America; (ii) after final amalgamation of Pangaea, an arc developed along its western margin, causing magmatism and regional amphibolite–facies metamorphism in southern Mexico, the Maya Block (including Rabinal complex), the Chuacús complex and the Chortís Block. The separation of North and South America also rifted the Chortís Block from southern Mexico. Rifting ultimately resulted in the formation of the Late Jurassic–Early Cretaceous oceanic crust of the South El Tambor complex; rifting and spreading terminated before the Hauterivian (c. 135 Ma). Remnants of the southwestern Mexican Guerrero complex, which also rifted from southern Mexico, remain in the Chortís Block (Sanarate complex); these complexes share Jurassic metamorphism. The South El Tambor subduction–accretion complex was emplaced onto the Chortís Block probably in the late Early Cretaceous and the Chortís Block collided with southern Mexico. Related arc magmatism and high-T/low-P metamorphism (Taxco–Viejo–Xolapa arc) of the Mixteca terrane spans all of southern Mexico. The Chortís Block shows continuous Early Cretaceous–Recent arc magmatism.

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Section: Late Eocene -Recent Eastward Displacement Of the Chortís Blockmentioning

confidence: 98%

Section: Ar/ar and Rb -Sr Geochronologymentioning

confidence: 99%

The North American-Caribbean Plate boundary in Mexico-Guatemala-Honduras

et al. 2009

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“…Keppie, 2004;Solari et al, 2007;Pérez-Gutiérrez et al, 2009). These rocks were displaced sinistrally along the La VentaChacalapa Fault during Eocene-Oligocene time (Ratschbacher et al, 1991;Riller et al, 1992;Tolson, 2005;Solari et al, 2007;Ratschbacher et al, 2009). The Acatlán and Oaxacan complexes are unconformably overlain by unmetamorphosed continental redbeds, siliciclastic fluvial deposits and shallow marine shelf sediments of Upper Permian to Middle Jurassic age (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

U–Pb geochronological constraints on the Triassic–Jurassic Ayú Complex, southern Mexico: Derivation from the western margin of Pangea-A

et al. 2012

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“…Some Geology is recompiled from Kesler et al (1970); Anderson et al (1973); Steiner & Walker (1996); Weber et al (2005Weber et al ( , 2006b; Ortega-Obregón et al (2008) and unpublished data of the authors. of the bounding faults, such as the Chacalapa -La Venta fault system, are dated as Oligocene NE of Puerto Angel, Oaxaca (Tolson 2005), or as Early Eocene at Tierra Colorada, Guerrero .…”

mentioning

confidence: 99%

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

Solari

Ortega-Gutiérrez

Elı́as-Herrera

et al. 2009

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Precambrian and Palaeozoic basements are present in southern Mexico and Central America, where several crustal blocks are recognized by their different geological record, and juxtaposed along lateral faults. Pre-Mesozoic reconstructions must take into account the nature of such crustal blocks, their geological history, age and petrology. Some of those crustal blocks are currently located between southernmost north America (the Maya Block) and Central America (Chortís Block).To better understand the geology of these crustal blocks, and to establish comparisons between their geological history, we performed U-Pb dating of both igneous and metasedimentary key units cropping out in central and western Guatemala. In the Altos Cuchumatanes (Maya Block) granites yield both Permian (269 + 29 Ma) and Early Devonian (391 + 7.

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La falla Chacalapa en el sur de Oaxaca

Cited by 49 publications

References 13 publications

The North American-Caribbean Plate boundary in Mexico-Guatemala-Honduras

The North American-Caribbean Plate boundary in Mexico-Guatemala-Honduras

U–Pb geochronological constraints on the Triassic–Jurassic Ayú Complex, southern Mexico: Derivation from the western margin of Pangea-A

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

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