Origin of iron-oxide and silicate melt rocks in Paleogene sediments of southern Ellesmere Island, Canadian Arctic Archipelago, Nunavut

2007 ◽  
Vol 44 (7) ◽  
pp. 1005-1013 ◽  
Author(s):  
Karsten Piepjohn ◽  
Solveig Estrada ◽  
Lutz Reinhardt ◽  
Werner von Gosen ◽  
Harald Andruleit
Keyword(s):  
Canadian Arctic ◽  
Ellesmere Island ◽  
Anthropogenic Activity ◽  
Canadian Arctic Archipelago ◽  
X Ray Diffraction ◽  
Coal Seams ◽  
Volcanic Origin ◽  
X Ray ◽  
Early Tertiary ◽  
Unconsolidated Sand

Between Vendom Fiord and Makinson Inlet on southern Ellesmere Island, Canadian Arctic Archipelago, Nunavut, isolated and fault-bounded Early Tertiary basins are exposed. The basin deposits are Paleocene to Eocene in age and overlie unconformably folded Ordovician and Silurian carbonates of the Paleozoic Franklinian Basin that were affected by intense, pre-Paleocene weathering and karstification in places. The Tertiary sediments consist mainly of dark unconsolidated sand and silt and are interbedded with many centimetre- to metre-thick coal seams. In several places, round orange and red "spots" occur within the dark grey Tertiary basin fills and are clustered on top of the dark grey Tertiary occurrences. The "spots" are up to 100 m in diameter and consist of consolidated burnt shards of clay or clinker. In the centre of the reddish "spots," dark, massive, and partly high-magnetic lava- or slag-like rocks are poorly exposed as masses that are a decimetre or less in scale. These rocks were investigated using thin section studies, as well as X-ray diffraction and X-ray flourescence analyses. The melt rocks are composed of glass, cordierite-group minerals, hematite, magnetite, tridymite, mullite, and cristobalite. They represent paralavas resulting from subsurface combustion of the Tertiary coal seams under conditions similar to those in a blast furnace. An origin by anthropogenic activity or a volcanic origin can be ruled out.

The career and disappearance of Hans K.E. Krüger, Arctic geologist, 1886–1930

Polar Record ◽  
1993 ◽  
Vol 29 (171) ◽  
pp. 277-304 ◽  
Author(s):  
William Barr
Keyword(s):  
Continental Shelf ◽  
Canadian Arctic ◽  
Field Work ◽  
Ellesmere Island ◽  
Canadian Arctic Archipelago ◽  
Royal Canadian Mounted Police ◽  
West Greenland

ABSTRACTOn 19 March 1930 the German geologist, Hans K.E. Krüger, accompanied by a Dane, Åge Rose Bjare, and an Inughuk, Akqioq (the latter driving their dog sledge) set off westwards from the Royal Canadian Mounted Police post at Bache Peninsula, Ellesmere Island; two support sledges, driven by Inughuit, escorted them. It appears to have been Krüger's intention to study the geology of the coasts of the outer islands of the Canadian Arctic archipelago and to carry out soundings of the continental shelf and slope. The two support sledges turned back at Depot Point, Eureka Sound. Krüger, Bjare, and Akqioq were never seen again. This article reviews Krüger's background, his preparations for the expedition (which included two summers of field work in West Greenland and a wintering in northwest Greenland), and the extensive searches mounted by the RCMP in 1931 and 1932. Finally, it analyzes the evidence provided by three messages left by Krüger and subsequently recovered, with a view to making an educated guess as to the fate of the expedition.

Whole-Rock Rb/Sr Ages of Metamorphic Rocks from Northern Ellesmere Island, Canadian Arctic Archipelago. I. The Gneiss Terrain between Ayles Fiord and Yelverton Inlet

1975 ◽  
Vol 12 (1) ◽  
pp. 90-94 ◽  
Author(s):  
A. K. Sinha ◽  
Thomas Frisch
Keyword(s):  
Regional Metamorphism ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Metamorphic Rocks ◽  
Canadian Arctic Archipelago ◽  
Fold Belt ◽  
Late Precambrian

The first Precambrian ages from the Northern Ellesmere Fold Belt are reported. Six rocks from the largest gneiss terrain in northern Ellesmere Island yield a Late Precambrian age (minimum 742 ± 12 m.y.) of regional metamorphism. Relatively high initial 87Sr/86Sr suggests that the rocks were derived from crustal materials.

Eocene lower vertebrates from Ellesmere Island, Canadian Arctic Archipelago

1980 ◽  
Vol 30 ◽  
pp. 325-347 ◽  
Author(s):  
Richard Estes ◽  
J. Howard Hutchison
Keyword(s):  
Canadian Arctic ◽  
Ellesmere Island ◽  
Canadian Arctic Archipelago ◽  
Lower Vertebrates

scholarly journals Glaciological Studies on Ice Island T-3

1963 ◽  
Vol 4 (36) ◽  
pp. 709-730
Author(s):  
Jiro Muguruma ◽  
Keiji Higuchi
Keyword(s):  
Sea Ice ◽  
Diffraction Method ◽  
Ice Cores ◽  
Ellesmere Island ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Radial Structure

AbstractThe nature of candle ice, stratified ice and ice of radial structure observable on ice island t-3 was investigated. Cores were drilled through the ice island at two sites. Crystallographic examination, and visco-clastic and chlorinity measurements, were made all along the cores. Results indicate that the ice body of t-3 is composed of three strata; the stratum above a heavy dirt layer is composed of iced firn which shows a granular nature with crystalline facets; that below the dirt layer is “basement ice”; and at the bottom is a sea-ice layer 1.8 m. thick. The basement ice is subdivided into four strata. Petrographic studies of dirt samples obtained from the surface and from the ice cores were carried out by an X-ray diffraction method; from the results, the dirt is thought to be dust of Precambrian granite or gneiss, which are the prevailing rocks in Ellesmere Island. The structure of t-3 was inferred from assumptions based on the data obtained from the core drillings at the two sites.

scholarly journals Geochemical characteristics of elements in coal seams 41 and 42 of Heshan Coalfield, South China

2019 ◽  
Vol 38 (1) ◽  
pp. 137-157 ◽  
Author(s):  
Qiaojing Zhao ◽  
Yongjie Niu ◽  
Zhizhong Xie ◽  
Kuangming Zhang ◽  
Jinming Zhou ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Geochemical Characteristics ◽  
X Ray Diffraction ◽  
Coal Seams ◽  
X Ray ◽  
Inductively Coupled ◽  
Reducing Environment ◽  
Conventional Microscopy ◽  
Hydrothermal Activities ◽  
Scanning Electron

Coal seams 41 and 42 of the Heshan Coalfield belong to superhigh-organic-sulfur coals. In order to study the geochemical characteristics of the coals, 15 coal samples and 6 rock samples were collected from both coal seams and the roof/floor rocks. The samples were investigated by using conventional microscopy, inductively coupled plasma mass spectroscopy, X-ray diffraction, X-ray fluorescence, and scanning electron microscopy with an energy-dispersive X-ray spectroscopy. The results show that minerals in the coals are dominated by kaolinite and a mixed layer illite/smectite and illite; small ratios of pyrite, quartz, chlorite, smectite, calcite, and dolomite are also present. Under the microscope, these pyrites occur as framboidal, euhedral, homogeneous, anhedral, nodular, and fine dissemination shapes. In Shicun Mine, the trace elements Li, Y, Zr, Sn, Sm, and Tb are enriched; Zn and Ba are depleted. However, in the Heliluoshan Mine, Mo is significantly enriched; Li, Zr, Cs, and U are enriched; and Co and Ba are depleted. The occurrence of Li and Ga is associated mainly with organic matter and sulfate minerals. U and Mo occur in silicate minerals, carbonate minerals, illite, I/S, and pyrite. A reducing environment is beneficial for the enrichment of V, Cr, Mn, Ni, Mo, Cd, and U. The abundances of sulfur in Heshan were controlled mainly by the degree of seawater influence and hydrothermal activities.

scholarly journals Glaciological Studies on Ice Island T-3

1963 ◽  
Vol 4 (36) ◽  
pp. 709-730 ◽  
Author(s):  
Jiro Muguruma ◽  
Keiji Higuchi
Keyword(s):  
Sea Ice ◽  
Diffraction Method ◽  
Ice Cores ◽  
Ellesmere Island ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Radial Structure

AbstractThe nature of candle ice, stratified ice and ice of radial structure observable on ice island t-3 was investigated. Cores were drilled through the ice island at two sites. Crystallographic examination, and visco-clastic and chlorinity measurements, were made all along the cores. Results indicate that the ice body of t-3 is composed of three strata; the stratum above a heavy dirt layer is composed of iced firn which shows a granular nature with crystalline facets; that below the dirt layer is “basement ice”; and at the bottom is a sea-ice layer 1.8 m. thick. The basement ice is subdivided into four strata. Petrographic studies of dirt samples obtained from the surface and from the ice cores were carried out by an X-ray diffraction method; from the results, the dirt is thought to be dust of Precambrian granite or gneiss, which are the prevailing rocks in Ellesmere Island. The structure of t-3 was inferred from assumptions based on the data obtained from the core drillings at the two sites.

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