NDLI: Provenance, transport and diagenesis of sediment in polar areas: a case study in Profound Lake, King George Island, Antarctica

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Volume 37, 2018

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A histological study of the skin, hair follicles and moult of the hooded seal (Cystophora cristata [Erxleben, 1777])

Large versus small zooplankton in relation to temperature in the Arctic shelf region

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The magnetic method as a tool to investigate the Werenskioldbreen environment (south-west Spitsbergen, Arctic Norway)

Response of Antarctic sea-ice algae to an experimental decrease in pH: a preliminary analysis from chlorophyll fluorescence imaging of melting ice

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Circulation and exchange in a broad Arctic fjord using glider-based observations

The sensitivity of diatom taxa from Yakutian lakes (north-eastern Siberia) to electrical conductivity and other environmental variables

Provenance, transport and diagenesis of sediment in polar areas: a case study in Profound Lake, King George Island, Antarctica

Temperature (latitude) and nutrient (seabird guano) effects on limno-terrestrial Tardigrada (Testechiniscus spitsbergensis and Pilatobius recamieri) body size

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Precipitation instruments at Rothera Station, Antarctic Peninsula: a comparative study

Sediments of MIS 5e age suggested by new OSL dates from the Skilvika section, west Svalbard

Occurrence of Ulva lactuca L. 1753 (Ulvaceae, Chlorophyta) at the Murman Сoast of the Barents Sea

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Effect of seasonal mesoscale and microscale meteorological conditions in Ny-Ålesund on results of monitoring of long-range transported pollution

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Current logistical capacity is sufficient to deliver the implementation and management of a representative Antarctic protected area system

Description of plant communities on Half Moon Island, Antarctica

Revisiting perceptions and evolving culture: a community dialogue on women in polar research

Adult survival of Arctic terns in the Canadian High Arctic

Are current research funding structures sufficient to address rapid Arctic change in a meaningful way?

Warm-water events in the eastern Fram Strait during the last 2000 years as revealed by different microfossil groups

Abnormal gonads in the Antarctic toothfish (Dissostichus mawsoni Norman, 1937 [Perciformes: Nototheniidae]): the first record and histological description

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Provenance, transport and diagenesis of sediment in polar areas: a case study in Profound Lake, King George Island, Antarctica

Content Provider	Taylor & Francis Online
Author	Matus, Daniela Hernández, Ana C. Mahaney, William C. Bastias, Joaquin
Abstract	Detailed scanning electron microscopy (SEM) micro-texture and mineralogical analysis of lacustrine sediment recovered from Profound Lake (also known as Uruguay Lake), Antarctica, was conducted in the foreland area of the Collins Glacier, King George Island. Very coarse and coarse sand grade size fractions (2 mm – 600 μm) were examined with SEM/energy dispersive spectrometry, while the total sand fraction and fines (silt + clay) were examined using x-ray diffraction to determine relationships to source rock, weathering and transport history and long-term clay mineral weathering, all of which are poorly understood in polar areas. The mineralogy of these sediments was compared with petrographical information of the country rock to identify potential detrital sources. The association of recovered detrital minerals, sometimes strongly pre-weathered, supports release from source rock of basaltic and andesitic compositions. The micro-texture analysis of quartz, magnetite and various plagioclase grains show micro-features that reveal a complex weathering–diagenesis history tentatively extending into the Paleogene. The bedrock was eroded mostly by glacial processes and mechanical action presumed to result from glacial crushing. Alteration minerals, likely the product of pre-weathering, are probably sourced from weathered bedrock during contact with the sub-aerial atmosphere prior to entrainment. However, amorphous silica precipitation indicates weathering subsequent to glacial erosion from the source bedrock. Cracks of variable dimensions are mostly characteristic of either frost weathering or glacial transport, and involve mechanical and chemical processes.
File Format	PDF HTM / HTML
ISSN	17518369
DOI	10.1080/17518369.2018.1490619
Journal	Polar Research
Volume Number	37
Issue Number	1
Language	English
Publisher	Routledge
Publisher Date	2018-08-20
Access Restriction	Open
Subject Keyword	Lake sediment Micro-texture characteristics Hydrothermal alteration Quartz grain micromorphology Environmental interpretation EDS: energy dispersive spectrometry SEM: scanning electron microscopy XRD: x-ray diffraction
Content Type	Text
Resource Type	Article
Subject	1900/1901 Environmental Chemistry Environmental Science Oceanography

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