Organic matter in Oligocene Menilite formation rocks of the Ukrainian Carpathians: palaeoenvironment and geochemical evolution

Koltun, Yuriy V.

doi:10.1016/0146-6380(92)90105-7

Cited by 39 publications

(43 citation statements)

References 9 publications

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“…Dis tri bu tion of n-al kanes, isoprenoids and biomarkers in these oils in di cate the ma rine or i gin of source organic mat ter (Type II or mixed II/III kerogens) dis persed in clastic sed i ments de pos ited in suboxic en vi ron ments. This type of kerogen has been iden ti fied for the Oligocene Menilite Beds of the Carpathian flysch strata (Koltun, 1992;Kotarba and Koltun, 2006). The pres ence of oleanane in oils from the Lopushna field show that they have been sourced from rocks not older than Creta ceous, which ex cludes their cor re la tion with the Pa leo zoic to Ju ras sic se quence of the plat form base ment.…”

Section: Discussionmentioning

confidence: 99%

“…The lat ter con tain low-and nor mal-sulphur Type II kerogen and have been de pos ited in ma rine clastic anoxic en vi ron ments (Koltun, 1992;Koltun et al, 1998).…”

Section: Oil-source Rock Correlationmentioning

confidence: 99%

“…In or der to iden tify the or i gin of oil from the Lopushna field, geo chem i cal data from the oil sam ples stud ied have been compared with re sults al ready ob tained from oils and source rocks from two ex ist ing pe tro leum sys tems in the area of the Ukrainian Carpathians, namely the pe tro leum sys tems of the Outer Carpathians and of the plat form de pos its of the base ment of the Ukrai nian Carpathian Foredeep (Koltun, 1992;Koltun et al, 1998;Kotarba et al, 2005Kotarba et al, , 2007Kotarba and Koltun, 2006;Wiêc³aw et al, 2012).…”

Section: Geochemical Characteristics Of Oils and Oil-oil Correlationmentioning

confidence: 99%

“…The ear lier in ves ti ga tions (Koltun, 1992;Koltun et al, 1998;Kotarba et al, 2005Kotarba et al, , 2007Kotarba and Koltun, 2006;Wiêc³aw et al, 2012) show that most of the oils ac cu mu lated within the Carpathian flysch strata be long to one oil fam ily and that the organic-rich rocks of the Oligocene Menilite Beds of the Carpathian flysch se quence, hav ing good source rock prop erties and oc cur ring at the depth range cov er ing the en tire "oil win dow", are the source rocks for these oils.…”

Section: Oil-source Rock Correlationmentioning

confidence: 99%

“…The main as pects of pe tro leum gen er a tion and ac cu mu lation in the area of the Ukrai nian Carpathians have been discussed in ear lier pub li ca tions (Koltun, 1992;Koltun et al, 1998;Kotarba et al, 2005Kotarba et al, , 2007Kotarba and Koltun, 2006;Wiêc³aw et al, 2012). The prin ci pal source rocks have been rec og nized and in ves ti gated, whereas oils and nat u ral gases have been stud ied with re spect to their ge netic char ac ter is tics.…”

Section: Introductionmentioning

confidence: 99%

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Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: the case of the Lopushna traps

Radkovets¹,

Kotarba

Koltun³

et al. 2015

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1 Na tional Acad emy of Sci ences of Ukraine, In sti tute of Ge ol ogy and Geo chem is try of Com bus ti ble Min er als, Naukova 3a, 79060 Lviv, Ukraine The Lopushna oil field has been dis cov ered in Mesozoic-Paleogene strata of the plat form base ment be neath the Ukrai nian Outer (Flysch) Carpathians. Oils from two main ac cu mu la tions, oc cur ring in Up per Cre ta ceous sand stone and Up per Ju rassic lime stone res er voirs, have been ana lysed in or der to iden tify their or i gin and re la tion to the known pe tro leum sys tems in the re gion of the Outer Carpathians and the base ment of the Carpathian Foredeep. Re sults of geo chem i cal in ves ti ga tions of oils, in clud ing biomarker and iso to pic data, show a good cor re la tion with oils ac cu mu lated in Carpathian flysch strata. The oils are low-sul phur and did not un dergo sig nif i cant deg ra da tion. They were gen er ated from Type II or II/III kerogen, de posited in anoxic en vi ron ments in clastic sed i ments. Gen er a tion oc curred at the peak of "oil win dow", prob a bly in the tem per ature range of 122 to 126 o C. The pres ence of oleanane in di cates Cre ta ceous or youn ger source rocks. Good cor re la tion of biomarker and iso to pic data with the or ganic mat ter dis persed in the Oligocene Menilite Beds oc cur ring at the top of the Carpathian flysch suc ces sion al lowed iden ti fi ca tion of these as source rocks for oils of the Lopushna field, which thus can be re garded as an oil fam ily of the Outer Carpathians. The mi gra tion dis tance for both the Lopushna oils and oils ac cu mu lated in the Carpathian flysch strata was sim i lar. A num ber of sub-ver ti cal dis lo ca tions, along which the sub sided flysch strata oc cur at the same depth level as the Ju ras sic and Cre ta ceous rocks of the plat form, can be as sumed as pos si ble mi gra tion pathways from the ma ture source rocks of the Oligocene Menilite Beds of the Boryslav-Pokuttya, Skyba or Krosno units to the Lopushna type traps, which sug gests the pos si bil ity of ex is tence of other hy dro car bon ac cu mu la tions of this type. The Lopushna field so far is unique in con tain ing this type of oil found in the base ment of the Ukrai nian Carpathian Foredeep.

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Section: Discussionmentioning

confidence: 99%

“…The lat ter con tain low-and nor mal-sulphur Type II kerogen and have been de pos ited in ma rine clastic anoxic en vi ron ments (Koltun, 1992;Koltun et al, 1998).…”

Section: Oil-source Rock Correlationmentioning

confidence: 99%

Section: Geochemical Characteristics Of Oils and Oil-oil Correlationmentioning

confidence: 99%

Section: Oil-source Rock Correlationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: the case of the Lopushna traps

Radkovets¹,

Kotarba

Koltun³

et al. 2015

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Stratigraphic and geochemical study of the organic-rich black shales in the Tarcău Nappe of the Moldavidian Domain (Carpathian Chain, Romania)

Belayouni

Staso

Guerrera

et al. 2007

Int J Earth Sci (Geol Rundsch)

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An integrated stratigraphic analysis has been made of the Tarcȃu Nappe (Moldavidian Domain, Eastern Romanian Carpathians), coupled with a geochemical study of organic-rich beds. Two Main Sequence Boundaries (Early Oligocene and near to the Oligocene-Aquitanian boundary, respectively) divide the sedimentary record into three depositional sequences. The sedimentation occurred in the central area of a basin supplied by different and opposite sources. The high amount of siliciclastics at the beginning of the Miocene marks the activation of the ''foredeep stage''. The successions studied are younger than previously thought and they more accurately date the deformation of the different Miocene phases affecting the Moldavidian Basin. The intervals with black shales identified are related to two main separate anoxic episodes with an age not older than Late Rupelian and not before Late Chattian. The most important organic-rich beds correspond to the Lower Menilites, Bituminous Marls and Lower Dysodilic Shales Members (Interval 2). These constitute a good potential source rock for petroleum, with homogeneous Type II oil-prone organic matter, highly lipidic and thermally immature. The deposition of black shales has been interpreted as occurring within a deep, periodically isolated and tectonically controlled basin.

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New data on the Vrancea Nappe (Moldavidian Basin, Outer Carpathian Domain, Romania): paleogeographic and geodynamic reconstructions

Amadori

Belayouni

Guerrera

et al. 2012

Int J Earth Sci (Geol Rundsch)

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A study has been performed on the Cretaceous to Early Miocene succession of the Vrancea Nappe (Outer Carpathians, Romania), based on field reconstruction of the stratigraphic record, mineralogical-petrographic and geochemical analyses. Extra-basinal clastic supply and intrabasinal autochthonous deposits have been differentiated, appearing laterally inter-fingered and/or interbedded. The main clastic petrofacies consist of calcarenites, sub-litharenites, quartzarenites, sub-arkoses, and polygenic conglomerates\ud derived from extra-basinal margins. An alternate internal and external provenance of the different supplies is the result of the paleogeographic re-organization of the basin/margins system due to tectonic activation and exhumation of rising areas. The intra-basinal deposits consist of black shales and siliceous sediments (silexites and cherty beds), evidencing major environmental changes in the Moldavidian Basin. Organic-matter-rich black shales were deposited during anoxic episodes related to sediment starvation and high nutrient influx due to paleogeographic isolation of the basin caused by plate drifting. The black shales display relatively high contents in sub-mature to mature, Type II lipidic organic matter (good oil and gas-prone source rocks) constituting a potentially active petroleum system.\ud The intra-basinal siliceous sediments are related to oxic pelagic or hemipelagic environments under tectonic quiescence conditions although its increase in the Oligocene part of the succession can be correlated with volcanic supplies.\ud The integration of all the data in the ‘‘progressive reorientation of convergence direction’’ Carpathian model, and their consideration in the framework of a foreland basin, led to propose some constrains on the paleogeographic-geodynamic evolutionary model of the Moldavidian Basin from the Late Cretaceous to the Burdigalian

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Organic matter in Oligocene Menilite formation rocks of the Ukrainian Carpathians: palaeoenvironment and geochemical evolution

Cited by 39 publications

References 9 publications

Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: the case of the Lopushna traps

Origin and migration of oil from the Ukrainian Outer Carpathians to their Mesozoic basement: the case of the Lopushna traps

Stratigraphic and geochemical study of the organic-rich black shales in the Tarcău Nappe of the Moldavidian Domain (Carpathian Chain, Romania)

New data on the Vrancea Nappe (Moldavidian Basin, Outer Carpathian Domain, Romania): paleogeographic and geodynamic reconstructions

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