scholarly journals Density and magnetic susceptibility measurements of igneous rocks from the Marysvale volcanic field, west-central Utah

1982 ◽  
Author(s):  
R.L. Mackie ◽  
C.G. Cunningham
Keyword(s):  
Magnetic Susceptibility ◽  
Volcanic Field ◽  
Igneous Rocks ◽  
West Central

Integrated uranium system in the Marysvale volcanic field, west-central Utah

1980 ◽  
Author(s):  
Thomas August Steven ◽  
Charles G. Cunningham ◽  
Michael N. Machette
Keyword(s):  
Volcanic Field ◽  
West Central

40Ar/39Ar Geochronology and Geochemical Reconnaissance of the Eocene Lowland Creek Volcanic Field, West‐Central Montana

2010 ◽  
Vol 118 (3) ◽  
pp. 295-304 ◽  
Author(s):  
Francis Ö. Dudás ◽  
Vladimir O. Ispolatov ◽  
Stephen S. Harlan ◽  
Lawrence W. Snee
Keyword(s):  
Volcanic Field ◽  
West Central ◽  
Central Montana

Calderas of the Marysvale Volcanic Field, west central Utah

1984 ◽  
Vol 89 (B10) ◽  
pp. 8751 ◽  
Author(s):  
T. A. Steven ◽  
P. D. Rowley ◽  
C. G. Cunningham
Keyword(s):  
Volcanic Field ◽  
West Central

scholarly journals VNITŘNÍ ZONÁLNOST TĚLES HORNIN TĚŠÍNITOVÉ ASOCIACE VE SLEZSKÉ JEDNOTCE: KORELACE PETROGRAFICKÝCH A PETROFYZIKÁLNÍCH PARAMETRŮ

2014 ◽  
Vol 21 (1-2) ◽  
Author(s):  
Kristýna Schuchová ◽  
Zdeněk Dolníček
Keyword(s):  
Magnetic Susceptibility ◽  
Igneous Rocks ◽  
Western Carpathians ◽  
Published Data ◽  
Modal Composition ◽  
Petrophysical Parameters ◽  
Rock Samples ◽  
Outer Western Carpathians ◽  
Petrographic Study

This article is focused on petrography of igneous rocks of the teschenite association and its correlation with selected petrophysical parameters. These igneous rocks were studied at three localities in the Silesian unit (Outer Western Carpathians) – Hodslavice, Žilina near Nový Jičín and Tichá. We conducted petrographic study (including modal composition based on planimetry) and then we compared results with previously published data on magnetic susceptibility and density of the same rock samples. The primary magmatic phases (clinopyroxenes, amphibole, biotite, opaque phases, feldspars and analcime) show in all cases less or more signs of post-magmatic alteration, giving rise mainly to secondary chlorite, carbonate and “limonite”. The amount of chlorite ranges from 21 to 23, 3 to 9, and 16 to 35 mod. % and those of carbonate vary from 5 to 15, 3 to 4, and 16 to 24 mod. % in Hodslavice, Žilina near Nový Jičín, and Tichá, respectively. The values of magnetic susceptibility range from 5.56 × 10-8 to 7.66 × 10-5, 5.07 × 10-7 to 1.61 × 10-5, and 2.46 × 10-7 to 2.93 × 10-5 SI and those of density are between 2.50 and 2.77, 2.66 to 3.88, and 2.65 to 2.86 g/cm3 in Hodslavice, Žilina near Nový Jičín, and Tichá, respectively. Correlation of petrographic and petrophysical parameters suggests that various postmagmatic alterations (including chloritization, carbonatization and weathering associated with formation of limonite) can influence the values of magnetic susceptibility and density. The intensity of these alterations varies significantly among samples and sites.

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