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El Abra Deposit

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Journal Article
Journal: Economic Geology
Published: 01 January 2016
Economic Geology (2016) 111 (1): 1–28.
...Karen J. Correa; Osvaldo M. Rabbia; Laura B. Hernández; David Selby; Marcelo Astengo Abstract Zircon LA-ICP-MS and CA-TIMS and molybdenite Re-Os geochronology for the El Abra porphyry copper deposit (Chile) document a ~8.6 Ma protracted magmatic-hydrothermal history. Initial magmatic events...
FIGURES | View All (17)
Journal Article
Journal: Economic Geology
Published: 01 October 1977
Economic Geology (1977) 72 (6): 1062–1085.
...J. Ambrus Abstract The El Abra porphyry copper deposit, located 42 km north of Chuquicamata, was mined on a small scale in the past, and several studies of the deposit were carried out prior to 1972. From 1972 to 1975, the Corporacion Nacional del Cobre de Chile completed an evaluation program...
Image
Ages of intrusive rocks from the <b>El</b> <b>Abra</b> <b>deposit</b>. A. CA-TIMS  206 Pb&#x2F; 238 U...
Published: 01 January 2016
Fig. 3 Ages of intrusive rocks from the El Abra deposit. A. CA-TIMS 206 Pb/ 238 U dates. Best estimated ages (youngest grain), or mean weighted age for equivalent zircon population, are indicated for each unit. B. LA-ICP-MS 206 Pb/ 238 U dates with probability plots and density functions. Light
Journal Article
Journal: Economic Geology
Published: 01 December 2006
Economic Geology (2006) 101 (8): 1569–1581.
... important copper porphyry districts, which includes the Chuquicamata, Radomiro Tomic, and El Abra deposits. Follow-up drilling in the center of the anomaly, through ~300 m of piedmont gravel cover, revealed barren andesitic basement rocks. The soil anomalies were caused by ground water reaching the surface...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1982
AAPG Bulletin (1982) 66 (5): 607–608.
...Charles J. Minero Reservoir quality in the middle Cretaceous Golden Lane oil field, Mexico, was enhanced by freshwater dissolution during subaerial exposure in the Late Cretaceous and early Tertiary. Study of the outcropping equivalent El Abra Limestone in the type area demonstrates the presence...
Book Chapter

Author(s)
Robert W. Scott
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 1990
DOI: 10.2110/csp.90.02.0001
EISBN: 9781565762251
... differed between open-sea shelf margins and ramps around intrashelf basins. Three well-documented shelf margin reefs are the Rodessa, Stuart City, and E1 Abra formations. In these units, corals are abundant in the deeper parts of the reef and grade downward into slope and basin deposits. Rudists...
Journal Article
Published: 01 April 1999
Exploration and Mining Geology (1999) 8 (1-2): 65–89.
..., Chuquicamata, El Abra, La Escondida, and El Salvador. These deposits are spatially and genetically associated with the closing igneous activity along this range, prior to a 30 km eastward jump of the magmatic front in response to tectonic plate interaction. The porphyry copper deposits are also spatially...
Series: AAPG Memoir
Published: 01 January 2003
DOI: 10.1306/M79877C7
EISBN: 9781629810546
... Cretaceous and Upper Eocene deposits in contact.” In their Figure 1 , an area of erosion is shown that is approximately 85 km long and 20 km wide. However, they present no description of samples or other lithologic evidence. Figure 1. Albian-Cenomanian paleogeography of Actopan Platform with El Abra...
FIGURES | View All (8)
Book Chapter

Author(s)
Robert W. Scott
Series: SEPM Concepts in Sedimentology and Paleontology
Published: 01 January 1990
DOI: 10.2110/csp.90.02.0067
EISBN: 9781565762251
...Abstract Abstract 1. Albian to lower Cenomanian shelf margin reefs in the Gulf Coast are developed within the Rodessa, Stuart City, and El Abra formations, among others. Reefs in the lower Glen Rose and Mooringsport members remain to be documented. 2. Early and medial to early-late Albian...
Journal Article
Journal: Economic Geology
Published: 01 March 2001
Economic Geology (2001) 96 (2): 351–366.
... porphyry copper deposit yielded an age of 17.03 ± 0.03 Ma coincident with the known supergene alunite dates for this deposit. Reconnaissance dating at Exotica-Mina Sur and El Abra proved problematic due to the presence of contaminant silicate minerals within the copper wad. Ages derived here for exotic...
FIGURES | View All (8)
Image
Location map for the principal <b>deposits</b> and prospects of the <b>El</b> <b>Abra</b> and Ch...
Published: 01 January 2016
Fig. 8 Location map for the principal deposits and prospects of the El Abra and Chuquicamata districts, showing the Toki cluster position at 37 to 39 Ma following the 35-km left lateral offset of the West fault (after Dilles et al., 1997 ). Projection: UTM19; Datum: Provisional South America
Image
—Diagrammatic reconstruction of environment of <b>deposition</b> of <b>El</b> <b>Abra</b>, Tamab...
Published: 01 August 1972
FIG. 19 —Diagrammatic reconstruction of environment of deposition of El Abra, Tamabra, and Tamaulipas Limestones for small area based on this study, together with distribution of important fossil groups.
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2005
DOI: 10.5382/SP.12.11
EISBN: 9781629490366
... of mapping described herein include the Ann Mason porphyry copper deposit, Yerington district, Nevada; the Bajo de la Alumbrera mine; Argentina; the El Abra-Fortuna-Chuquicamata districts of Chile; and the Pioneer Mountains of Montana. Beyond the use of traditional paper-based mapping methods, recent...
FIGURES | View All (6)
Journal Article
Journal: AAPG Bulletin
Published: 01 January 2011
AAPG Bulletin (2011) 95 (1): 105–146.
... deposits at the base, is the basinal equivalent of the shallow-water carbonate facies of the El Abra Formation and their slope and toe-of-slope debris of the Tamabra Formation during the late Aptian to Albian. By the end of the Early Cretaceous, the isolated Golden Lane platform built up to 1200 m (3937 ft...
FIGURES | View All (24)
Journal Article
Journal: GSA Bulletin
Published: 19 October 2017
GSA Bulletin (2018) 130 (3-4): 617–629.
... the ∼500 m of structural relief between the El Abra Formation at Sierra de El Abra and the El Abra-1 well presented in Figure 1 was created by contractional deformation along a reverse fault, or if it represents original bathymetric relief along the platform margin during Cretaceous deposition ( Gray et...
FIGURES | View All (8)
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1972
AAPG Bulletin (1972) 56 (8): 1419–1447.
...FIG. 19 —Diagrammatic reconstruction of environment of deposition of El Abra, Tamabra, and Tamaulipas Limestones for small area based on this study, together with distribution of important fossil groups. ...
FIGURES | View All (21)
Series: SEPM Special Publication
Published: 01 January 1977
DOI: 10.2110/pec.77.25.0273
EISBN: 9781565761551
...Abstract Abstract The petroleum producing Albian-Cenomanian limestone of the Tampico embayment consists of three regional facies belts: the Tamaulipas (basinal), El Abra (reef, backreef, lagoon), and Tamabra (basin margin). The principle lithologies of the Tamabra Limestone, in order...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1969
AAPG Bulletin (1969) 53 (3): 706.
... middle Cretaceous carbonate rocks along the Gulf Coast. The Golden Lane fields produce from the El Abra Limestone, which was deposited in a shallow shelf or lagoon with scattered rudistid patch reefs. The structurally lower Poza Rica trend fields are 5–8 mi west and southwest of the Golden Lane...
Series: GCSSEPM
Published: 01 July 1993
DOI: 10.5724/gcs.92.13.0155
EISBN: 978-0-9836097-3-5
... to the west. Fragments of dolomite and fossiliferous lime packstones, some containing the miliolid Foraminifera Nummotoculina heimi , were most likely derived from the middle Cretaceous El Abra Formation. Easterly directed paleocurrent measurements preclude the Tuxpán Platform (Golden Lane) as a major source...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1967
AAPG Bulletin (1967) 51 (1): 167–168.
... rudistid reefs in Sierra El Abra, Tampico region, Mexico, are examples of true reefs. Little Molasses Reef, Florida Keys, is interpreted as a bank which was formed by mechanical accumulation of skeletal debris. Rodriguez Key, Florida Keys, and mud mounds in Florida Bay are examples of banks representing...