Geochemistry of Middle Jurassic mudstones (Kraków-Częstochowa area, southern Poland) : interpretation of the depositional redox conditions

2007
journal article
article
dc.abstract.enMiddle Bathonian iron-bearing dark grey mudstones and claystones from the Kraków-Częstochowa Upland (southrn Poland) were subjected to geochemical and mineralogical study in order to evaluate palaeo-redox conditions of their deposition and diagenesis. They are mainly composed of kaolinite, with smaller amounts of other clay minerals and detrital quartz. Organic matter is composed of type III and/or IV kerogen and its \delta ^{13}C is between -23 and -24‰, suggesting a mainly terrigenous source, with a possible admixture of marine input. Most geochemical parameters: (total organic carbon) TOC/S, U/Th, Ni/Co, V/Cr, (Cu+Mo)/Zn ratios, authigenic uranium content, and Fe-TOC-S relation ship, indicate deposition under oxygenated bottom water conditions. By contrast, DOP (degree of pyritization) and V/V+Ni indices suggest a dysoxic environment. However, DOP probably reflects redox conditions in the sediment during diagenesis rather than in the over laying water column. The composition of the organic matter and the domination of pyrite euhedra over framboids in dicates that the V/V+Ni ratio may not be reliable for determination of redox conditions in the rocks studied. There is no significant difference between the geochemical indices of host rocks with nodules and those without them.pl
dc.affiliationWydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznychpl
dc.contributor.authorSzczepanik, Patrycjapl
dc.contributor.authorWitkowska, Magdalenapl
dc.contributor.authorSawłowicz, Zbigniew - 131812 pl
dc.date.accession2018-12-01pl
dc.date.accessioned2019-01-07T08:09:36Z
dc.date.available2019-01-07T08:09:36Z
dc.date.issued2007pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.additionalBibliogr. s. 65-66pl
dc.description.number1pl
dc.description.physical57-66pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume51pl
dc.identifier.eissn2082-5099pl
dc.identifier.issn1641-7291pl
dc.identifier.projectROD UJ / OPpl
dc.identifier.urihttps://ruj.uj.edu.pl/xmlui/handle/item/64939
dc.identifier.weblinkhttps://gq.pgi.gov.pl/article/view/7437pl
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa 3.0 Polska*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/pl/legalcode*
dc.share.typeotwarte czasopismo
dc.subject.enMiddle Jurassicpl
dc.subject.enCzęstochowa Clay Formationpl
dc.subject.enpalaeoenvironmentpl
dc.subject.engeochemical parameterspl
dc.subject.enredox conditionspl
dc.subtypeArticlepl
dc.titleGeochemistry of Middle Jurassic mudstones (Kraków-Częstochowa area, southern Poland) : interpretation of the depositional redox conditionspl
dc.title.journalGeological Quarterlypl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
Middle Bathonian iron-bearing dark grey mudstones and claystones from the Kraków-Częstochowa Upland (southrn Poland) were subjected to geochemical and mineralogical study in order to evaluate palaeo-redox conditions of their deposition and diagenesis. They are mainly composed of kaolinite, with smaller amounts of other clay minerals and detrital quartz. Organic matter is composed of type III and/or IV kerogen and its \delta ^{13}C is between -23 and -24‰, suggesting a mainly terrigenous source, with a possible admixture of marine input. Most geochemical parameters: (total organic carbon) TOC/S, U/Th, Ni/Co, V/Cr, (Cu+Mo)/Zn ratios, authigenic uranium content, and Fe-TOC-S relation ship, indicate deposition under oxygenated bottom water conditions. By contrast, DOP (degree of pyritization) and V/V+Ni indices suggest a dysoxic environment. However, DOP probably reflects redox conditions in the sediment during diagenesis rather than in the over laying water column. The composition of the organic matter and the domination of pyrite euhedra over framboids in dicates that the V/V+Ni ratio may not be reliable for determination of redox conditions in the rocks studied. There is no significant difference between the geochemical indices of host rocks with nodules and those without them.
dc.affiliationpl
Wydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznych
dc.contributor.authorpl
Szczepanik, Patrycja
dc.contributor.authorpl
Witkowska, Magdalena
dc.contributor.authorpl
Sawłowicz, Zbigniew - 131812
dc.date.accessionpl
2018-12-01
dc.date.accessioned
2019-01-07T08:09:36Z
dc.date.available
2019-01-07T08:09:36Z
dc.date.issuedpl
2007
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.additionalpl
Bibliogr. s. 65-66
dc.description.numberpl
1
dc.description.physicalpl
57-66
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
51
dc.identifier.eissnpl
2082-5099
dc.identifier.issnpl
1641-7291
dc.identifier.projectpl
ROD UJ / OP
dc.identifier.uri
https://ruj.uj.edu.pl/xmlui/handle/item/64939
dc.identifier.weblinkpl
https://gq.pgi.gov.pl/article/view/7437
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa 3.0 Polska
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses/by/3.0/pl/legalcode
dc.share.type
otwarte czasopismo
dc.subject.enpl
Middle Jurassic
dc.subject.enpl
Częstochowa Clay Formation
dc.subject.enpl
palaeoenvironment
dc.subject.enpl
geochemical parameters
dc.subject.enpl
redox conditions
dc.subtypepl
Article
dc.titlepl
Geochemistry of Middle Jurassic mudstones (Kraków-Częstochowa area, southern Poland) : interpretation of the depositional redox conditions
dc.title.journalpl
Geological Quarterly
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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