Comparison of upper Bashkirian-upper Moscovian high frequency cycles between Bjornoya and the Loppa High, western Barents Sea

L. Stemmerik, G. Elvebakk, I. Nilsson, S. Olaussen

Research output: Chapter in Book/Report/Conference proceedingChapter in bookResearchpeer-review

12 Citations (Scopus)

Abstract

The upper Bashkirian-upper Moscovian succession on Bjornoya and in well 7120/2-1 from the Loppa High is composed of stacked high frequency, fourth- order cycles of mixed siliciclastics and carbonates. Four different types of cycles have been distinguished: conglomerate-dominated cycles are 5-10 m thick and characterised by conglomerates and shallow marine sandstones and they form close to tectonically active highs. Sandstone-dominated cycles are 5-15 m thick, and are composed of mixed sandstone, carbonate and shale in the lower, transgressive part whereas the succeeding regressive part consists of a coarsening- and shalllowing-upward sandstone succession. They characterise open platforms with a moderate supply of siliciclastic material whereas siltstone-dominated cycles formed in protected areas with limited siliclastic supply. Carbonate-dominated cycles consist of a basal bioturbated wackestone overlain by biogenic packstones and grainstones. Most cycles are terminated by microkarstic surfaces.

Original languageEnglish
Title of host publicationSequence stratigraphy - concepts and applications
EditorsF.M. Gradstein, K.O. Sandvik, N.J. Milton
PublisherElsevier
Pages215-227
Number of pages13
ISBN (Print)0444827803
Publication statusPublished - 1995

Programme Area

  • Programme Area 3: Energy Resources

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