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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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Namibia (1)
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Atlantic Ocean
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North Atlantic
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Caribbean Sea
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South Atlantic
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South America
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Brazil
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commodities
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fossils
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Primary terms
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absolute age (2)
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Africa
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Namibia (1)
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Atlantic Ocean
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South Atlantic
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biogeography (1)
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carbon
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Cenozoic
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lower Paleogene (1)
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lower Paleocene
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Danian (3)
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K-T boundary (1)
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Sarmiento Formation (1)
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Central America
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Chortis Block (1)
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Chordata
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crust (1)
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Deep Sea Drilling Project
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economic geology (1)
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faults (1)
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geophysical methods (6)
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igneous rocks (1)
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Invertebrata
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Mollusca
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Veneroida
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Carditidae (1)
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Pterioida
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Pectinidae (1)
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Protista
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isotopes
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stable isotopes
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magmas (1)
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Lower Cretaceous
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Upper Cretaceous
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Jurassic (1)
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metals
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alkali metals
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sodium (1)
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aluminum (1)
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Ocean Drilling Program
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Leg 165 (1)
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oil and gas fields (3)
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paleoclimatology (1)
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paleoecology (1)
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paleomagnetism (2)
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palynomorphs
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Dinoflagellata (1)
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miospores
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pollen (1)
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petroleum
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natural gas (1)
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Plantae
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algae
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nannofossils (1)
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Spermatophyta
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Angiospermae (1)
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plate tectonics (2)
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sea-level changes (1)
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sedimentary rocks
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carbonate rocks
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limestone
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oolitic limestone (1)
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clastic rocks
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black shale (1)
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sandstone (5)
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sediments (1)
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South America
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Argentina
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Chubut Argentina (6)
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La Pampa Argentina (1)
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Mendoza Argentina (1)
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Neuquen Argentina (1)
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Neuquen Basin (1)
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Rio Negro Argentina (2)
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Santa Cruz Argentina (2)
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Brazil
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Pelotas Basin (1)
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Colombia
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Magdalena Valley (1)
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Patagonia (7)
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Uruguay (1)
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structural geology (1)
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tectonics (2)
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well-logging (2)
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rock formations
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Roca Formation (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone
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oolitic limestone (1)
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clastic rocks
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black shale (1)
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sandstone (5)
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volcaniclastics (1)
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sediments
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sediments (1)
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volcaniclastics (1)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
San Jorge Basin
The angiosperm pollen Volkheimerites labyrinthus gen. et sp. nov. from the earliest Paleogene (Danian) of Patagonia, Argentina Available to Purchase
Seismic tomography as an interpretation tool Available to Purchase
The family Carditidae (Bivalvia) in the early Danian of Patagonia (Argentina) Available to Purchase
New age constraints for early Paleogene strata of central Patagonia, Argentina: Implications for the timing of South American Land Mammal Ages Available to Purchase
Application of amplitude volume technique attributes, their variations, and impact Available to Purchase
SEDIMENTARY FACIES AND DEPOSITIONAL ENVIRONMENTS OF DIVERSE EARLY PALEOCENE FLORAS, NORTH-CENTRAL SAN JORGE BASIN, PATAGONIA, ARGENTINA Available to Purchase
Petroleum Source Rock Analysis in the Western Caribbean Region: An Overview Available to Purchase
Abstract Compilation, analysis, integration, and interpretation of geochemical data from oil and gas fields, exploratory and scientific wells, oil and gas seeps, and outcrop samples allows the identification of effective and potential Cretaceous and Tertiary source rocks throughout the western Caribbean. In this vast region, seven source rocks of different ages are proven to be considered source rocks: (1) lower–middle Eocene Punta Gorda and Touche Formations along the Nicaraguan Rise (SR1), (2) middle Eocene, Yellow Limestone Group in Jamaica Island (SR2), (3) late Cretaceous (Cenomanian–Campanian) Loma Chumico Formation present mainly in northwestern Costa Rica (SR3), (4) middle Miocene Gatun Formation in Panama and Costa Rica (SR4), (5) late Cretaceous (Coniacian–Campanian) Cansona Formation in the Sinu and San Jacinto basins (SR5), (6) Oligocene to early Miocene Cienaga de Oro and lower Porquero Formations and age-equivalent units in the Lower Magdalena Valley basins (SR6), and (7) late Cretaceous (Coniacian–Santonian) rocks in the Colombian and Venezuelan basins (SR7). Although the Cretaceous section sequence is generally considered the most likely source rock in the northern part of the South American plate, data from the Venezuela and Colombian basins suggest that the petroleum generative potential of the Campanian–Maastrichtian rocks is a non-source rock, normally with total organic carbon values < 0.5%. Also, in the Mosquitia Basin offshore Honduras and Jamaica Island, the middle and upper Cretaceous contain low organic matter, suggesting the absence of source rock. The identification of several source rocks in the western Caribbean region is quite encouraging; however, future geologic research and petroleum exploration will allow to constrain the geographic distribution of the source rocks already identified and to refine in more detail their geochemical characteristics and petroleum generative potential.
THE ROLE OF TELOGENETIC INJECTION OF MAGMATICALLY DERIVED CO 2 IN THE FORMATION OF DAWSONITE FROM THE CASTILLO FORMATION, CHUBUT GROUP, PATAGONIA, ARGENTINA Available to Purchase
Improvement of the reservoir characterization of fluvial sandstones with geostatistical inversion in Golfo San Jorge Basin, Argentina Available to Purchase
New age constraints for the Salamanca Formation and lower Río Chico Group in the western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene extinction recovery and land mammal age correlations Available to Purchase
Tectonic Reconstructions and Petroleum System Correlations in the Southern South Atlantic: Exploratory Analysis and the Search for a New Hydrocarbon Play Available to Purchase
Abstract Plate tectonic reconstructions and geophysical interpretations across the southern South Atlantic Ocean suggest geodynamic relationships between Brazilian and West African continental margin basins, particularly the correlation of synrift basins, transform faults, fracture zones, salt basins, and other geological markers. The analysis indicates a diversity of basin characteristics (rift and drift systems) on both sides of the South Atlantic that define them as different stratigraphic, structural, and geochemical entities. Marked differences are observed between the basins north and south of the Florianópolis (Rio Grande) Fracture Zone in Brazil and the Walvis Ridge in Africa, which are clearly expressed in the regional deep seismic profiles recently obtained in the conjugate margins. However, in terms of petroleum systems, the basins are characterized by several geochemical similarities in source rocks deposited during a continental, lacustrine synrift sequence. This interpretation has been overlooked by several previous works comparing the South Atlantic margins, but it has been recently applied to the delineation of several exploratory targets in the southern Angola, Namibian, and South Africa offshore basins. Two end-end member basins have been suggested north and south of the Walvis Ridge–Florianópolis Fracture Zone, which experienced a different structural and stratigraphic evolution as a consequence of their geodynamic models. The southern African basins (located south of the Walvis Ridge), as well as the conjugate Pelotas Basin offshore Brazil, and the offshore Uruguay and Argentina basins, have been associated with the development of volcanic margins, formed during the emplacement of the Tristan da Cunha mantle plume. Due to the lack of significant hydrocarbon discoveries in the southernmost South Atlantic, doubts have been cast on the presence of the prolific Lower Cretaceous lacustrine source rock systems south of the Walvis Ridge, which occur in the northern basins (particularly in the Greater Campos basin) and are overlain by the massive salt offshore Angola. This work reports the comparison of the geological, geophysical, geochemical and consequently the petroleum system features of the Namibian and South African basins (Walvis, Lüderitz, and Orange) with the basins offshore Brazil, Uruguay, and Argentina. The results of seismic, potential field, and geochemical analyses of oil samples recovered from offshore wells in the South Atlantic conjugate margins endorse the application of a unified model for source rock and petroleum system assessment in the offshore basins, heralding the existence of a new frontier for the petroleum exploration offshore Namibia, possibly containing giant lacustrine oil and gas reserves.