western Mesabi

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Series: DNAG, Centennial Field Guides
Published: 01 January 1987
DOI: 10.1130/0-8137-5403-8.53
EISBN: 9780813754093
... Abstract The western Vermilion district is located in northeastern Minnesota, about 18 mi (30 km) north of the towns of Virginia and Aurora on the Mesabi iron range (Fig.1). The major towns in the western Vermilion district are Cook, Tower, Soudan, and Ely. The area to be described here lies...
Published: 01 January 1966
EISBN: 9781560802709
... Abstract Electrical resistivity, magnetic susceptibility, and gamma-ray intensity measurements were made of iron formations and associated rocks in the Cuyuna and Mesabi iron ranges of Minnesota, the Gogebic iron range of Wisconsin, and the Iron River district of Michigan. The measurements were...
Journal Article
Published: 01 January 2007
Environmental & Engineering Geoscience (2007) 13 (1): 55–68.
... of this grunerite as fibrous in habit. In contrast, he found that the unaltered (unmetamorphosed) taconite is devoid of amphibole of any type; the unmetamorphosed taconite extends from the western limit of the Mesabi Range northeastward to approximately the town of Aurora. The asbestos issues surrounding...
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Journal Article
Published: 01 August 2020
American Mineralogist (2020) 105 (8): 1259–1269.
... ). Furthermore, a study comparing the incidence of mesothelioma and lung disease in the western (hematite-rich, non-amphibole-bearing) and eastern (non-asbestiform, amphibole-bearing) Mesabi Iron Range in northern Minnesota did not find a higher incidence of disease in the amphibole-bearing portion of the mining...
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Journal Article
Journal: Geology
Published: 20 August 2019
Geology (2019) 47 (10): 899–903.
...-and-thrust belt to the southeast of the suture and deposition of foreland sediments in the northwest ( Sims et al., 1989 ). The northward propagation of the Penokean fold-and-thrust belt has been linked to the formation of numerous high-grade hematite ore deposits in iron formations of the Mesabi Range...
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Journal Article
Journal: Geology
Published: 17 April 2020
Geology (2020) 48 (7): 688–692.
... columns for Lake Superior iron formations (Ontario, Canada, and north-central United States), including Cuyuna, Mesabi, and Gunflint Ranges. Fm—Formation; IF—Iron Formation; Qtz—Quartzite. (B) Stratigraphic column of drill hole 89-MC-1 showing locations of samples from Gunflint Formation...
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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(06)
EISBN: 9780813756240
... appreciable argillite and siltstone, the name Pokegama Formation is more appropriate. It has been studied by several workers since it was named by Winchell ( 1893 ) from exposures at the western end of the Mesabi Iron Range. Much of the previous work was summarized by Morey ( 1972 , 1973 , 2003). Few...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1958
AAPG Bulletin (1958) 42 (1): 173–189.
... of the Gunflint formation in western Cook County, Minnesota, and is overlain probably with disconformity by the Keweenawan basalts and sandstones. The whole sequence dips south at angles averaging 12°. Samples of the Rove slates were obtained from the lower Rove, west end of the Gunflint lake, in the S...
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Journal Article
Published: 01 August 1980
Bulletin of the Seismological Society of America (1980) 70 (4): 1347–1368.
... to the western boundary fault of the Midcontinent Geophysical Anomaly, one of the major tectonic features of interior North America. Third, the array provides monitoring for a newly recognized tectonic hinge line across central Minnesota which has been the site of several felt earth- quakes, the most recent...
Journal Article
Journal: Elements
Published: 01 April 2011
Elements (2011) 7 (2): 119–120.
... of the past, similar processes may have created the “direct shipping” ores of the Mesabi Range of Minnesota, some of which were basically loose piles of dusty iron oxides filling surface basins. Miners used to extracting metals from hard bedrock had trouble believing that these deposits truly were economic...
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Journal Article
Journal: Geology
Published: 01 July 2016
Geology (2016) 44 (7): 547–550.
... ). In contrast, others have argued that ore formation involved ascending magmatic fluids driven by ca. 1.1 Ga mafic intrusions (e.g., Gruner, 1937 ). More recently, Morey (1999) drew on the close spatial association of ore bodies with faults to propose that high-grade hematite ores of the Mesabi Range...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1959
AAPG Bulletin (1959) 43 (7): 1497–1499.
... in Libya, and particularly the Sahara, must certainly find their home in Western Europe. The market is there and is presently expanding much more rapidly than our own. The same is true of an expanding market in South America. Middle East crude should eventually find its greatest market in India and other...
Journal Article
Journal: Economic Geology
Published: 01 May 2004
Economic Geology (2004) 99 (3): 611–624.
... of the Mesabi Range, Minnesota—product of a continental-scale Proterozoic ground-water flow system : Economic Geology , v. 94 , p. 133 – 142 . Morris , R.C. , 1980 , Magnetite-hematite relations in the banded iron formations in the Hamersley iron province of Western Australia : Economic Geology...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2010
GSA Bulletin (2010) 122 (1-2): 50–75.
..., if not global, changes in the environment that resulted in this widespread synchronous change in sedimentation style. Figure 1. Map showing approximate locations for Sudbury impact-layer localities in Michigan and the surrounding region. Sites in Michigan are new localities reported here. Mesabi Range...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 1926
AAPG Bulletin (1926) 10 (2): 190–196.
.... Since many of the older Minnesota maps show that much of the northern and western parts of the state is covered by Cretaceous deposits resting on these old mountains, it may appear, even to the geologist, that there exists in this region favorable territory for possible accumulations of petroleum...
Journal Article
Journal: Economic Geology
Published: 01 March 2001
Economic Geology (2001) 96 (2): 249–270.
... and slope stability in the present-day pit, has been its dynamic setting within the West fault system ( Tomlinson and Blanco, 1997 ). The various vein systems were formed during an early period of dextral shear developed between the Mesabi fault on the east and a western fault that has probably been...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 1952
AAPG Bulletin (1952) 36 (7): 1323–1329.
..., the Alberta fields in Canada, the Scurry and Spraberry fields in Texas, in addition to the fields in central Sumatra, southern Iraq, and the Cretaceous fields of western Venezuela. In some of these areas, geologic explorations had gone on for years without any oil ever having been found before. In others...
Series: Reviews in Economic Geology
Published: 01 January 2008
DOI: 10.5382/Rev.15.14
EISBN: 9781629490229
... Archean greenstone belt-hosted iron formation. The remaining production has come from Proterozoic strata including 2.3 Gt from the Mesabi and 100 Mt from the Cuyuna Ranges in Minnesota while Michigan and Wisconsin contributed 230 Mt from the Marquette Range, 290 Mt from the Menominee Range, and 325 Mt...
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Journal Article
Journal: Geology
Published: 01 December 2015
Geology (2015) 43 (12): 1083–1086.
... , Hematite and Mn oxide (U-Th)/He dates from the Buckskin-Rawhide detachment system, western Arizona: Gaining insights into hematite (U-Th)/He systematics : American Journal of Science , v. 314 , p. 1373 – 1435 , doi:10.2475/10.2014.01. Farley K.A. Flowers R.M. , 2012 , (U-Th)/Ne...
Journal Article
Published: 01 April 1983
Canadian Journal of Earth Sciences (1983) 20 (4): 622–638.
...D. L. Southwick; W. C. Day Abstract Proterozoic diabase and gabbro dikes (~2120 Ma old) form a major northwest-oriented swarm extending about 300 km from the Mesabi iron range in Minnesota to the vicinity of Kenora, Ontario. The dikes were emplaced into Archean crust at about the time...