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Del Abra Formation

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Journal Article
Journal: GSA Bulletin
Published: 01 May 2007
GSA Bulletin (2007) 119 (5-6): 609–622.
... significant source inversion, with clasts supplied from the eastern basement domain, is recorded ∼2000 m from the base, within the middle Miocene Del Abra Formation; reactivation of western granitic thrust sheets occurred by the late middle Miocene and late Miocene, as indicated by provenance studies...
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Image
Published: 01 May 2007
location in Fig. 2 ), early Miocene volcanics (EMV), and late Miocene volcanics (LMV). Cenozoic units were partially cannibalized (see text for details), supplying clasts when exhumed during thrust migration. Note that lower units, Del Crestón Formation and Del Abra Formation, have first-order clasts
Image
Published: 01 May 2007
Crestón Formation. (E) Porphyritic granite-rich conglomerate in lower megasequence MS3, Del Abra Formation. (F) Pebbly conglomerates in lower megasequence MS4, Del Buey Formation (upper section). (G) Thick volcaniclastic succession interlayered with clastic conglomerate in MS5, lower section of El Durazno
Image
Published: 01 April 2005
Figure 2 Geology of the study area. (a) Geologic map of the Abra del Condor–Canaletas fold and thrust belt. AdC indicates the Abra del Condor, and Can shows the Canaletas outcrops. (b) Cross section, stratigraphy from base to top as follows: Kirusillas–Tarabuco Shale (Psk-Pdt), Santa Rosa
Journal Article
Journal: AAPG Bulletin
Published: 01 April 2005
AAPG Bulletin (2005) 89 (4): 471–493.
...Figure 2 Geology of the study area. (a) Geologic map of the Abra del Condor–Canaletas fold and thrust belt. AdC indicates the Abra del Condor, and Can shows the Canaletas outcrops. (b) Cross section, stratigraphy from base to top as follows: Kirusillas–Tarabuco Shale (Psk-Pdt), Santa Rosa...
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Series: AAPG Memoir
Published: 01 January 2018
DOI: 10.1306/13622135M1173780
EISBN: 9781629812809
... ABSTRACT Tight fractured sandstones of the Devonian Huamampampa Formation are associated with large gas discoveries in the sub-Andean fold-and-thrust belt of southern Bolivia. A LIDAR-based fracture characterization of the Abra del Condor backlimb anticline, a structural-stratigraphic analog...
Image
Published: 01 May 1974
Fig. 2 —Carbonate facies of middle Cretaceous. Platform carbonates are El Abra Formation (local names also are used). Basin-margin breccia and skeletal debris, Tamabra Formation, is shown where known from outcrop or wells. Unpatterned areas are basinal pelagic limestones; Cuesta del Cura, Upper
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1930
AAPG Bulletin (1930) 14 (1): 73–91.
... the section on the east and southeast. On the west, however, the San Felipe formation crops out in contact with the El Abra limestone. The Tampico embayment has furnished many interesting problems to those who have studied the stratigraphy and structure of eastern Mexico. One much debated problem which...
FIGURES
Journal Article
Published: 01 July 2002
Journal of Paleontology (2002) 76 (4): 672–691.
... for a Cenomanian age of the beds at Paso del Rio and the ages of the few other occurrences of Paso del Rio faunal elements indicate that the age is middle or late Albian. A new species of Mexicaprina , M. quadrata , recently has been described from the El Abra Formation at El Madroño, State of Querétaro...
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Image
Published: 01 April 2005
Figure 8 Variability of joint patterns: (a) pavement map showing the orthogonal set of joints in Huamampampa Formation at Abra del Condor; (b) pavement map from Canaletas outcrop showing oblique splay joints and fractures caused by shearing along preexisting dip-parallel fractures; (c) cliff view
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1972
AAPG Bulletin (1972) 56 (8): 1419–1447.
... and thickness of overlying Cretaceous and Tertiary formations. (Modified from Sotomayor-C., 1954 .) FIG. 6 —Structure contour map, datum on top of El Abra, Tamabra, and Tamaulipas Limestones and locations of wells from which core was studied. Note approximate 1,000 m (3.280 ft) of relief between top...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1974
AAPG Bulletin (1974) 58 (5): 800–809.
...Fig. 2 —Carbonate facies of middle Cretaceous. Platform carbonates are El Abra Formation (local names also are used). Basin-margin breccia and skeletal debris, Tamabra Formation, is shown where known from outcrop or wells. Unpatterned areas are basinal pelagic limestones; Cuesta del Cura, Upper...
FIGURES | View All (9)
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1926
AAPG Bulletin (1926) 10 (7): 667–696.
... of the main Panuco high the formations dip into a rather deep syncline. They again emerge in a regional high which passes through the Ebano field. Westward from Ebano to the Boca del Abra Mountains there are a number of folds which are subparallel to the mountains. The depth to the Tamaulipas in the western...
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Journal Article
Published: 01 March 2011
Jour. Geol. Soc. India (2011) 77 (4): 349–359.
...John S. Armstrong-Altrin; J. Madhavaraju; Alcides N. Sial; Juan J. Kasper-Zubillaga; R. Nagarajan; K. Flores-Castro; Janet Luna Rodriguez Abstract Petrography and stable isotopes (carbon and oxygen) geochemistry of limestones from the El Abra Formation, Actopan, were studied to identify...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1956
AAPG Bulletin (1956) 40 (5): 890–896.
... counties. Nummoloculina occurring in the Devils River limestone in Val Verde County is figured and discussed. Nummoloculina from the El Abra miliolid member of the El Abra formation of northern Mexico (Lower Albian through Lower Cenomanian) is figured for comparison. The uppermost Devils River limestone...
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Journal Article
Published: 01 May 2002
Journal of Paleontology (2002) 76 (3): 408–423.
..., and Devils River formations are overlain by the Cenomanian Del Rio Formation ( Smith et al., 2000 ) ( Fig. 2 ). Many rudist species were defined on specimens collected from the El Abra Formation in Mexico, a widespread carbonate platform ( Wilson and Ward, 1993 ; Basáñez-Loyola et al., 1993 ). So...
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Journal Article
Journal: Economic Geology
Published: 01 December 2006
Economic Geology (2006) 101 (8): 1569–1581.
..., Noranda Ltd. carried out a soil geochemical survey of a 212-km 2 area within the Pampa del Tamarugal, west of a cluster of copper deposits that includes Chuquicamata, Radomiro Tomic, and El Abra (Fig. 1 ). Copper, Pb, Zn, and Cd were analyzed using a proprietary selective leach, referred to as the Mobile...
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Journal Article
Journal: Economic Geology
Published: 01 August 2022
Economic Geology (2022) 117 (5): 1043–1071.
.... during formation of the Rosario deposit, suggesting that at least one pulse of relatively fast exhumation has occurred in the Collahuasi district, but the total exhumed thickness since the late Eocene was probably less than at El Abra. Likewise, the abundance of potentially shallow, clinopyroxene...
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Journal Article
Journal: Geology
Published: 01 May 2001
Geology (2001) 29 (5): 468.
...) presented (U-Th)/He and fission track data to support the view that the Fortuna block is shifted vertically 600 ± 100 m relative to the eastern Chuquicamata block, and that the economic part of Chuquicamata may have been removed by post–ore formation erosion. There will be no easy consensus, because...
Journal Article
Published: 01 November 2007
Journal of Paleontology (2007) 81 (6): 1384–1395.
...) the Quebrada Chalala section in the Purmamarca area; 2) Abra Santa Laura on the eastern flank of the Sierra de Mojotoro; and 3) Abra de Sococha in the Parcha-Incamayo area. The ostracods were collected in the Coquena Formation ( Benedetto and Carrasco, 2002 ) in the Quebrada de Chalala (ca. 50 km...
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