Characterization of storm surge deposits along the shore of the Gulf of Gdańsk (Baltic Sea) applying heavy mineral analysis

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)The palaeoenvironmental changes of the south-western part of the Gulf of Gdańsk during the last 8,000 years, with reference to the stages of the Baltic Sea, were reconstructed. Diatom analyses of two cores taken from the shallower and deeper parts of the basin enabled the conclusion to be drawn that the microflora studied developed in the three Baltic phases: Mastogloia, Littorina and Post-Littorina. Moreover, the so-called anthropogenic assemblage was observed in subbottom sediments of the study area.

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Sedimentary provenance of the Plio-Pleistocene Nicobar Fan: Complex sourcing revealed through Raman spectroscopy heavy mineral analysis

Marine and Petroleum Geology ◽

10.1016/j.marpetgeo.2020.104874 ◽

2021 ◽

Vol 125 ◽

pp. 104874

Author(s):

Max Webb ◽

Amy Gough ◽

Paola Vannucchi ◽

Nils K. Lünsdorf ◽

Joseph McNeil

Keyword(s):

Raman Spectroscopy ◽

Heavy Mineral ◽

Mineral Analysis ◽

Sedimentary Provenance ◽

Heavy Mineral Analysis

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Detrital zircon geochronology and heavy mineral analysis as complementary provenance tools in the presence of extensive weathering, reworking and recycling: the Neogene of the southern North Sea Basin

Geological Magazine ◽

10.1017/s0016756821000133 ◽

2021 ◽

pp. 1-13

Author(s):

Jasper Verhaegen ◽

Hilmar von Eynatten ◽

István Dunkl ◽

Gert Jan Weltje

Keyword(s):

North Sea ◽

Chemical Weathering ◽

Heavy Mineral ◽

Mineral Analysis ◽

Provenance Analysis ◽

Detrital Zircon Geochronology ◽

Southern North Sea ◽

Variable Heavy ◽

Mineral Data ◽

Heavy Mineral Analysis

Abstract Heavy mineral analysis is a long-standing and valuable tool for sedimentary provenance analysis. Many studies have indicated that heavy mineral data can also be significantly affected by hydraulic sorting, weathering and reworking or recycling, leading to incomplete or erroneous provenance interpretations if they are used in isolation. By combining zircon U–Pb geochronology with heavy mineral data for the southern North Sea Basin, this study shows that the classic model of sediment mixing between a northern and a southern source throughout the Neogene is more complex. In contrast to the strongly variable heavy mineral composition, the zircon U–Pb age spectra are mostly constant for the studied samples. This provides a strong indication that most zircons had an initial similar northern source, yet the sediment has undergone intense chemical weathering on top of the Brabant Massif and Ardennes in the south. This weathered sediment was later recycled into the southern North Sea Basin through local rivers and the Meuse, leading to a weathered southern heavy mineral signature and a fresh northern heavy mineral signature, yet exhibiting a constant zircon U–Pb age signature. Thus, this study highlights the necessity of combining multiple provenance proxies to correctly account for weathering, reworking and recycling.

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