Petroleum geochemistry of Texas and Oklahoma oils along the Marathon—Ouachita fold-thrust belt, south-central U.S.A.

Curiale, Joseph A.

doi:10.1016/0009-2541(92)90096-n

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…Curiale ( 1983,1992) considered that grahamite/impsonite from the Ouachita Region is derived from the near-surface, low-temperature alteration of severely-altered crude oil by biodegradation, water-washing and evaporation. Stablecarbon and sulphur-isotope ratios imply that the Ouachita grahamite/impsonite are genetically related and have a common source (Curiale, 1983). According to Curiale (&id.…”

Section: Oxygenic Kerogenization Of Petroleum Asphaltene: Origin Of Imentioning

confidence: 99%

“…), the Ouachita grahamitehmpsonite, which occurs in Carboniferous rocks, was derived from heavy crude oils sourced locally from OrdoviciardSilurian strata. In addition, thermal maturity studies (Curiale, 1983;Houseknecht and Mathews, 1985) indicate that the thermal maturity of outcropping rocks in the region are within the oil "window" (between 60 and 150 "C).…”

Section: Oxygenic Kerogenization Of Petroleum Asphaltene: Origin Of Imentioning

confidence: 99%

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Oxygenic Kerogenization of Asphaltenes From the Dead Sea Basin (Israel)

Premović

Zlatković

Premović

et al. 1998

Journal of Petroleum Geology

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A kerogen‐like material was generated during a laboratory heating experiment with asphaltenes in the presence of O2. The asphaltenes had been extracted from a floating block of Dead Sea asphalt, and heated at 100 ‐ 200 d̀C for 1–12 days. This oxygenic kerogenization reaction follows first‐order kinetics. The half‐life (t1/2) of the asphaltenes (i.e. the time in which 50% of the asphaltenes had been converted to artificial kerogen) varied from 2,300 days at Od̀C, to 2 days at 100 d̀C. Similar results were obtained with asphaltenes which had been extracted from a number of bitumen‐bearing rocks in the Dead Sea area (from the Amiaz, Ein Boqeq, Nebi Mussa and Ef'e boreholes), and also from sandstones from the Heimar and IPRG boreholes which were impregnated with heavy or asphaltic crudes. These and other results suggest that low‐temperature (≤100d̀C) oxygenic kerogenization of Dead Sea asphaltenes (with or without the mediation of meteoric waters) may be a pathway for the formation of kerogen. Asphaltenes extracted from other bituminous rocks — the La Luna limestone (U. Cretaceous, Venezuela); the Serpiano marl (M. Triassic, Switzerland); the Messel shale (Tertiary, Germany); and the Aleksinac shale (Tertiary, Yugoslavia) — underwent laboratory kerogenization in a similar fashion to the Dead Sea materials. This suggests that oxygenic kerogenization may be widespread in porous and fractured, bitumen‐bearing rocks.

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Section: Oxygenic Kerogenization Of Petroleum Asphaltene: Origin Of Imentioning

confidence: 99%

Section: Oxygenic Kerogenization Of Petroleum Asphaltene: Origin Of Imentioning

confidence: 99%

Oxygenic Kerogenization of Asphaltenes From the Dead Sea Basin (Israel)

Premović

Zlatković

Premović

et al. 1998

Journal of Petroleum Geology

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Occurrence and origin of olefins in crude oils. A critical review

Curiale¹,

Frolov

1998

Organic Geochemistry

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The Origin of Hyper-Enriched Black Shales and Their Relationship to Hydrocarbon Generation

Henderson,

Williams-Jones,

Clark

2024

Economic Geology

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The Richardson Trough in northern Yukon hosts several occurrences of polymetallic hyper-enriched black shales (HEBS), comprising semimassive sulfide layers with metal concentrations several orders of magnitude above those of average black shales. Models seeking to explain the origin of such spectacular metal concentrations have focused on syndepositional, early diagenetic processes, proposing that the mineralization is entirely prelithification. These models do not provide satisfactory explanations for the mineral textures, paragenesis, and mineral chemistry and thus fail to capture the full story of HEBS formation. We present a new model for HEBS formation that explains mineral textures unaccounted for in previous genetic models. The sulfide fraction in HEBS is dominated by three types of pyrite: Ni-enriched framboidal pyrite (Py1a), euhedral pyrite (Py1b), and an As-enriched anhedral overgrowth (Py2). Two generations of millerite (NiS) have been identified. The first is blebby, disseminated millerite (Mlr1a) and interstitial millerite (Mlr1b), which replaced preexisting features in pyrite. The second millerite generation encases preexisting pyrite and locally replaced sphalerite (Mlr2a). It also forms laths in veinlets with cryptocrystalline quartz and bitumen and in fractures that crosscut bedding-parallel pyritic layers (Mlr2b). Some secondary millerite occurs in sulfide nodules (Mlr2c) containing sphalerite and gersdorffite. Much of the HEBS consists of biogenic quartz, detrital and diagenetic feldspar, and minor illite. The feldspars comprise K-, Ba-, and NH4-rich varieties. Detrital K-feldspar was altered to buddingtonite (Bud) during early diagenesis and to hyalophane (Hya-B) during late diagenesis. Authigenic hyalophane (Hya-A) precipitated concurrently with Hya-B, from pore-fluids in the HEBS matrix, or formed nodules (Hya-C) and veneers (Hya-D) on preexisting sulfides. We propose that the HEBS formed in three stages. Stage 1 involved extensive pyrite precipitation and significant accumulation of metal-rich organic material. Stage 2 coincided with the cessation of pyrite precipitation and the release of nickel and zinc from organic material to precipitate millerite and sphalerite. Stage 3 proceeded via reactions within the oil window that converted clay minerals to authigenic feldspar and released acid, partially dissolving sphalerite. Organic-hosted nickel reacted with sulfur released by sphalerite dissolution to precipitate the second generation of millerite. Our model provides the first explanation for the millerite-sphalerite textures, accounts for the multiple generations of millerite, and explains the various metal enrichments that characterize HEBS. It also demonstrates how diagenetic mineral reactions can strongly influence metal concentrations in black shale.

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Petroleum geochemistry of Texas and Oklahoma oils along the Marathon—Ouachita fold-thrust belt, south-central U.S.A.

Cited by 3 publications

References 38 publications

Oxygenic Kerogenization of Asphaltenes From the Dead Sea Basin (Israel)

Oxygenic Kerogenization of Asphaltenes From the Dead Sea Basin (Israel)

Occurrence and origin of olefins in crude oils. A critical review

The Origin of Hyper-Enriched Black Shales and Their Relationship to Hydrocarbon Generation

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