Thermal metamorphism of volcanic rocks on Barton Peninsula, King George Island, Antarctica

2002 ◽  
Vol 6 (4) ◽  
pp. 303-317 ◽  
Author(s):  
Hyeoncheol Kim ◽  
Moonsup Cho ◽  
Jong-Ik Lee
Keyword(s):  
Volcanic Rocks ◽  
King George Island ◽  
Thermal Metamorphism ◽  
Barton Peninsula

Geochemistry of a fossil hydrothermal system at Barton Peninsula, King George Island

1995 ◽  
Vol 7 (1) ◽  
pp. 63-72 ◽  
Author(s):  
Chil-Sup So ◽  
Seong-Taek Yun ◽  
Maeng-Eon Park
Keyword(s):  
Hydrothermal System ◽  
Meteoric Water ◽  
Volcanic Rocks ◽  
King George Island ◽  
Sulphur Isotope ◽  
Alteration Zones ◽  
Vein Formation ◽  
Calcite Veins ◽  
Lead Zinc ◽  
Barton Peninsula

A fossil hydrothermal system on Barton Peninsula, King George Island, Antarctica, formed a series of lead-zinc- and pyrite + native sulphur-bearing epithermal quartz ± calcite veins, filling fault-related fractures in hydrothermally altered volcanic rocks of Eocene age. The lead-zinc veins occur within argillic hydrothermal alteration zones, whereas the pyrite + native sulphur veins are found within advanced argillic alteration zones. Fluid inclusion data indicate that the vein formation occurred at temperatures between about 125° and 370°C (sphalerite deposition formed at 123–211°C) from fluids with salinities of 0.5–4.6 wt.% eq. NaCl. Equilibrium thermodynamic interpretation of mineral assemblages indicates that the deposition of native sulphur in the upper and central portions of the hydrothermal system was a result of the mixing of condensates of ascending magmatic gases and meteoric water giving rise to fluids which had lower pH (<3.5) and higher fugacities of oxygen and sulphur than the lead-zinc-depositing fluids at depth. The δ34S values of sulphide minerals from the lead-zinc veins (δ34S = −4.6 to 0.7‰) are much higher than the values of pyrite and native sulphur from the pyrite + native sulphur veins (δ34S = −12.9 to −20.1‰). This indicates that the fluids depositing native sulphur had higher sulphate/H2S ratios under higher fo2 conditions. Sulphur isotope compositions indicate an igneous source of sulphur with a δ34SΣS value near 0‰, probably the Noel Hill Granodiorite. Measured and calculated δ18O and δD values of the epithermal fluids (δ18Owater = −6.0 to 2.7‰, δDwater = −87 to −75‰) indicate that local meteoric water played an important role for formation of lead-zinc and native sulphur-bearing quartz veins.

Isotope geochemistry of volcanic rocks from the Barton Peninsula, King George Island, Antarctica

2011 ◽  
Vol 22 (1) ◽  
pp. 40-51 ◽  
Author(s):  
Jeong Hwang ◽  
Xiangshen Zheng ◽  
Edward M. Ripley ◽  
Jong-Ik Lee ◽  
Dongbok Shin
Keyword(s):  
Isotope Geochemistry ◽  
Volcanic Rocks ◽  
King George Island ◽  
Barton Peninsula

Trophic niche of seabirds on the Barton Peninsula, King George Island, Antarctica

2021 ◽  
pp. 107443
Author(s):  
Jong-Ku Gal ◽  
Bohyung Choi ◽  
Bo-Kyung Kim ◽  
Jin-Woo Jung ◽  
Jun-Oh Min ◽  
...  
Keyword(s):  
Trophic Niche ◽  
King George Island ◽  
Barton Peninsula

Evaluating the potential of MODIS-LST for monitoring ground surface temperatures in the Maritime Antarctic (Barton Peninsula, King George Island, Antarctic). 

2021 ◽  
Author(s):  
Alejandro Corbea-Pérez ◽  
Gonçalo Vieira ◽  
Carmen Recondo ◽  
Joana Baptista ◽  
Javier F.Calleja ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Ground Temperature ◽  
King George Island ◽  
Maritime Antarctic ◽  
In Situ Data ◽  
Surface Temperatures ◽  
Barton Peninsula

&lt;p&gt;Land surface temperature is an important factor for permafrost modelling as well as for understanding the dynamics of Antarctic terrestrial ecosystems (Bockheim et al. 2008). In the South Shetland Islands the distribution of permafrost is complex (Vieira et al. 2010) and the use of remote sensing data is essential since the installation and maintenance of an extensive network of ground-based stations are impossible. Therefore, it is important to evaluate the applicability of satellites and sensors by comparing data with in-situ observations. In this work, we present the results from the analysis of land surface temperatures from Barton Peninsula, an ice-free area in King George Island (South Shetlands). We have studied the period from March 1, 2019 to January 31, 2020 using data from the Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature (LST) and in-situ data from 6 ground temperature loggers. MOD11A1 and MYD11A1 products, from TERRA and AQUA satellites, respectively, were used, following the application of MODIS quality filters. Given the scarce number of high-quality data as defined by MODIS, all average LST with error &amp;#8804; 2K were included. Dates with surface temperature below -20&amp;#186;C, which are rare in the study area, and dates when the difference between MODIS and in-situ data exceeded 10&amp;#186;C were also examined. In both cases, those days on which MOD09GA/MYD09GA products showed cloud cover were eliminated. Eight in-situ ground temperature measurements per day were available, from which the one nearest to the time of satellite overpass was selected for comparison with MODIS-LST. The results obtained show a better correlation with daytime data than with nighttime data. Specifically, the best results are obtained with daytime data from AQUA (R&lt;sup&gt;2&lt;/sup&gt; between 0.55 and 0.81). With daytime data, correlation between MODIS-LST and in-situ data was verified with relative humidity (RH) values provided by King Sejong weather station, located in the study area. When RH is lower, the correlation between LST and in-situ data improves: we obtained correlation coefficients between 0.6 - 0.7 for TERRA data and 0.8 - 0.9 for AQUA data with RH values lower than 80%. The results suggest that MODIS can be used for temperature estimation in the ice-free areas of the Maritime Antarctic.&lt;/p&gt;&lt;p&gt;References:&lt;/p&gt;&lt;p&gt;Bockheim, J. G., Campbell, I. B., Guglielmin, M., and L&amp;#243;pez- Mart&amp;#305;nez, J.: Distribution of permafrost types and buried ice in ice free areas of Antarctica, in: 9th International Conference on Permafrost, 28 June&amp;#8211;3 July 2008, Proceedings, University of Alaska Press, Fairbanks, USA, 2008, 125&amp;#8211;130.&lt;/p&gt;&lt;p&gt;Vieira, G.; Bockheim, J.; Guglielmin, M.; Balks, M.; Abramov, A. A.; Boelhouwers, J.; Cannone, N.; Ganzert, L.; Gilichinsky, D. A.; Goryachkin, S.; L&amp;#243;pez-Mart&amp;#237;nez, J.; Meiklejohn, I.; Raffi, R.; Ramos, M.; Schaefer, C.; Serrano, E.; Simas, F.; Sletten, R.; Wagner, D. Thermal State of Permafrost and Active-layer Monitoring in the Antarctic: Advances During the International Polar Year 2007-2009. Permafr. Periglac. Process. 2010, 21, 182&amp;#8211;197.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;Acknowledgements&lt;/p&gt;&lt;p&gt;This work was made possible by an internship at the IGOT, University of Lisbon, Portugal, funded by the Principality of Asturias (code EB20-16).&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

Pygoscelis antarcticus feathers as bioindicator of trace element risk in marine environments from Barton Peninsula, 25 de Mayo (King George) Island, Antarctica

2017 ◽  
Vol 24 (11) ◽  
pp. 10759-10767 ◽  
Author(s):  
Soledad Perez Catán ◽  
Debora Bubach ◽  
Carla Di Fonzo ◽  
Laura Dopchiz ◽  
Maria Arribére ◽  
...  
Keyword(s):  
Trace Element ◽  
Marine Environments ◽  
King George Island ◽  
Pygoscelis Antarcticus ◽  
Barton Peninsula

scholarly journals Draft Genome Sequence of the Psychrotolerant Bacterium Methylobacterium sp. Strain BTF04, Isolated from Freshwater in Antarctica

2020 ◽  
Vol 9 (21) ◽  
Author(s):  
Ahnna Cho ◽  
Yong-Joon Cho ◽  
Soyeon Kim ◽  
Ok-Sun Kim
Keyword(s):  
Genome Sequence ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
King George Island ◽  
Psychrotolerant Bacterium ◽  
Barton Peninsula

ABSTRACT Methylobacterium sp. strain BTF04, a pink-pigmented psychrotolerant bacterium, was isolated from freshwater on Barton Peninsula, King George Island, Antarctica. Here, we report the assembled draft genome sequence of Methylobacterium sp. strain BTF04.

Combustion metamorphism in the Hat Creek area, British Columbia

1979 ◽  
Vol 16 (9) ◽  
pp. 1882-1887 ◽  
Author(s):  
B. N. Church ◽  
A. Matheson ◽  
Z. D. Hora
Keyword(s):  
British Columbia ◽  
High Temperature ◽  
Chemical Composition ◽  
Spontaneous Combustion ◽  
Volcanic Rocks ◽  
Thermal Metamorphism

An area of several square kilometres of subbituminous coal at Hat Creek has been burnt in prehistoric times, probably as a result of spontaneous combustion. The product of this combustion is a yellow and reddish partly fused rock with high temperature minerals and chemical composition unlike volcanic rocks. The effect of thermal metamorphism within a few hundred feet of the burnt zone is an apparent slight increase in coalification levels above regional metamorphic grades.

scholarly journals Complete Genome Sequence of a Psychrotolerant Denitrifying Bacterium, Janthinobacterium svalbardensis PAMC 27463

2017 ◽  
Vol 5 (46) ◽  
Author(s):  
Yong-Joon Cho ◽  
You-Jung Jung ◽  
Soon Gyu Hong ◽  
Ok-Sun Kim
Keyword(s):  
Genome Sequence ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Freshwater Lake ◽  
King George Island ◽  
Denitrifying Bacterium ◽  
Barton Peninsula ◽  
Rna Genes

ABSTRACT We report here the complete genome sequence of Janthinobacterium svalbardensis PAMC 27463 isolated from a freshwater lake on Barton Peninsula on King George Island, Antarctica. The genome consists of a chromosome with 6,274,078 bp which contains 5,585 genes, including 121 RNA genes.

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