Assessing provenance of Upper Cretaceous siliciclastics using spectral gamma-ray record

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F15%3A00111273" target="_blank" >RIV/00216224:14310/15:00111273 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/15:33155906

Výsledek na webu

<a href="https://www.degruyter.com/dg/viewarticle/j$002fgeoca.2015.66.issue-4$002fgeoca-2015-0028$002fgeoca-2015-0028.xml" target="_blank" >https://www.degruyter.com/dg/viewarticle/j$002fgeoca.2015.66.issue-4$002fgeoca-2015-0028$002fgeoca-2015-0028.xml</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/geoca-2015-0028" target="_blank" >10.1515/geoca-2015-0028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Assessing provenance of Upper Cretaceous siliciclastics using spectral gamma-ray record

Popis výsledku v původním jazyce

The relationship between contents of clay minerals/grain size and spectral gamma-ray record (concentrations of K, U and Th) in sediments is used for interpretation of sedimentary facies in wire-line logs. However, this approach is often complicated by the multi-component nature of mineralogically immature siliciclastics. As mineralogy of the source material and grain-size sorting during transport both contribute to the detrital composition of the final sediment, a joint study of facies and outcrop.- ray spectra can potentially make the latter an effective tool in provenance studies. This paper provides comparison of outcrop.- ray data and detailed facies mapping with mineral and chemical composition of the rocks (modal composition; transparent heavy mineral assemblages; WDX SEM chemistry of minerals) and interprets them in terms of provenance changes. We studied the Upper Cretaceous, synorogenic siliciclastic sediments of the Mazak and Godula Formations (Silesian Unit of the Western Carpathians flysch belt). Decreasing mineral maturity of the studied sandstones is consistent with provenance change from craton interior - (Mazak Formation) to transitional continental and recycled orogen sources (Godula Formation). Two major phases of K, U and Th concentration shifts, which occurred close to the Mazak/Godula Formation and Middle/Upper Godula Members boundaries, are consistent with changes in main detrital modes. These trends indicate gradually accelerated influx of material derived from high-grade metamorphic and plutonic rocks during deposition of the Mazak and Godula Formations. These changes are interpreted as reflecting a gradual exhumation and erosion of deeper crustal levels of the source area, the Silesian ridge.

Název v anglickém jazyce

Assessing provenance of Upper Cretaceous siliciclastics using spectral gamma-ray record

Popis výsledku anglicky

The relationship between contents of clay minerals/grain size and spectral gamma-ray record (concentrations of K, U and Th) in sediments is used for interpretation of sedimentary facies in wire-line logs. However, this approach is often complicated by the multi-component nature of mineralogically immature siliciclastics. As mineralogy of the source material and grain-size sorting during transport both contribute to the detrital composition of the final sediment, a joint study of facies and outcrop.- ray spectra can potentially make the latter an effective tool in provenance studies. This paper provides comparison of outcrop.- ray data and detailed facies mapping with mineral and chemical composition of the rocks (modal composition; transparent heavy mineral assemblages; WDX SEM chemistry of minerals) and interprets them in terms of provenance changes. We studied the Upper Cretaceous, synorogenic siliciclastic sediments of the Mazak and Godula Formations (Silesian Unit of the Western Carpathians flysch belt). Decreasing mineral maturity of the studied sandstones is consistent with provenance change from craton interior - (Mazak Formation) to transitional continental and recycled orogen sources (Godula Formation). Two major phases of K, U and Th concentration shifts, which occurred close to the Mazak/Godula Formation and Middle/Upper Godula Members boundaries, are consistent with changes in main detrital modes. These trends indicate gradually accelerated influx of material derived from high-grade metamorphic and plutonic rocks during deposition of the Mazak and Godula Formations. These changes are interpreted as reflecting a gradual exhumation and erosion of deeper crustal levels of the source area, the Silesian ridge.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geologica Carpathica

ISSN

1335-0552

e-ISSN

1336-8052

Svazek periodika

66

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

19

Strana od-do

311-329

Kód UT WoS článku

000361001400005

EID výsledku v databázi Scopus

2-s2.0-84941775001