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potassium

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Series: GSA Memoirs
Published: 01 January 2014
DOI: 10.1130/2014.1211(12)
... a single machine analysis to substitute for point counting at least 18 standard thin sections in each subarea in order to map compositional gradients. Because potassium occurs significantly only in biotite, close similarity of trend surfaces for potassium and biotite provides confirmation of the efficacy...
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Series: GSA Special Papers
Published: 01 June 2011
DOI: 10.1130/2011.2478(11)
... samples of primary erupted material. This tuffisite has high trace-element levels typical of carbonatite, but its high Cr and Ni make it exceptional. Fragmental phlogopite, sanidine, and orthoclase are indicators of potassium (K) mineralization in deeper parts of the conduit. This was the only known case...
Series: GSA Memoirs
Published: 01 September 2010
DOI: 10.1130/2010.1206(13)
... stage involved widespread potassium metasomatism, which produced increased values of K, Ba, and Rb that are not correlated with increased Fe or other hydrothermal elements. The metasomatizing fluid may have been basinal water heated during emplacement of Chestnut Hill volcanic rocks. The second stage...
Journal Article
Published: 01 June 2008
Clays and Clay Minerals (2008) 56 (3): 344-358.
..., UK . Giorgetti , G. , Monecke , T. , Kleeberg , R. , and Herzig , P.M. ( 2003 ) Intermediate sodium-potassium mica in hydrothermally altered rocks of the Waterloo deposit, Australia: a combined SEM-EMP-SRD-TEM study . Contributions to Mineralogy and Petrology , 146 , 159...
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Journal Article
Published: 01 April 2007
Clays and Clay Minerals (2007) 55 (2): 177-188.
... of America Special Paper , 285 , 44 pp. Brusewitz , A.M. ( 1986 ) Chemical and physical properties of Paleozoic potassium bentonites from Kinnekulle, Sweden . Clays and Clay Minerals , 34 , 442 – 454 . Brusewitz , A.M. ( 1988 ) Asymmetric zonation of a thick Ordovician K...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2409(19)
Journal Article
Published: 01 June 2005
Clays and Clay Minerals (2005) 53 (3): 234-249.
... , viii + 424 pp. Dalrymple , G.B. and Lanphere , M.A. ( 1969 ) Potassium-Argon Dating . Freeman, San Francisco , 258 pp. Dodson , M.H. ( 1973 ) Closure temperature in cooling geochronological and petrological systems . Contributions to Mineralogy and Petrology , 40...
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Journal Article
Published: 01 October 2004
Clays and Clay Minerals (2004) 52 (5): 603-612.
... biotite grains appear locally retrograded to kaolinite. Transmission electron microscopic data indicated that K biotite, Na biotite and Na-K biotite form parallel or subparallel packets with interfaces parallel to the basal planes of biotite. Potassium biotite forms thick packets, chemically homogeneous...
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Journal Article
Published: 01 February 2003
Clays and Clay Minerals (2003) 51 (1): 75-82.
.... * E-mail address of corresponding author: papa@geologie.ens.fr 30 08 2002 16 09 2002 © 2003, The Clay Minerals Society 2003 Clay Mineral Irrigation Mica-chlorite Interlayer Potassium Clay mineral changes in flood-irrigated soils have rarely been investigated...
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Journal Article
Journal: Geology
Published: 01 April 2002
Geology (2002) 30 (4): 307-310.
... their collections and from Creede drill cores. We thank W. Huff and an anonymous reviewer for their comments. References Bethke , P.M. , Rye , R.O. , and Barton , P.B.J. , 1986 , Pre-ore potassium metasomatism, Creede mining district, Colorado , in Hausen , D.M. , and Kopp , O.C...
FIGURES
Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 747-755.
... potassium aluminum beryllium borate rhodizite Antandrokomby Ampanivana Antsongombato Madagascar londonite nouvelle espèce minérale borate de beryllium césium potassium et aluminium rhodizite Antandrokomby Ampanivana Antsongombato Madagascar The first description of rhodizite...
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Journal Article
Published: 01 March 2000
American Mineralogist (2000) 85 (3-4): 420-429.
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Journal Article
Journal: Geophysics
Published: 01 January 2000
Geophysics (2000) 65 (6): 2001-2011.
...Robert B. K. Shives; B. W. Charbonneau; K. L. Ford Abstract Canadian case histories document the use of airborne and ground gamma-ray spectrometry to detect and map potassium alteration associated with different styles of mineralization. These include: volcanic-hosted massive sulfides (Cu-Pb-Zn...
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Journal Article
Journal: Geology
Published: 01 December 1999
Geology (1999) 27 (12): 1119-1122.
Journal Article
Journal: GSA Bulletin
Published: 01 December 1999
GSA Bulletin (1999) 111 (12): 1897-1906.
Journal Article
Published: 01 April 1999
Exploration and Mining Geology (1999) 8 (1-2): 137-147.
... kimberlite samples, selected from the drill core, were analyzed for major and trace elements. These elements included potassium (K), uranium (U), and thorium (Th), which are the main naturally-occurring radioactive elements. Different phases of the kimberlite, and the Cretaceous sediments which show...
Journal Article
Journal: Geology
Published: 01 March 1999
Geology (1999) 27 (3): 259-262.
...Kathi K. Beratan Abstract Potassium enrichment within the upper plate of the Whipple detachment fault, southeastern California, occurred as a discrete pulse between 18.5 and 14 Ma, following the most intense extension and prior to the last episode of movement on the detachment fault. This timing...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1999
GSA Bulletin (1999) 111 (2): 304-314.
...Anthony R. Hoch; Michael M. Reddy; James I. Drever Abstract Weathering of welded tuff near the summit of Snowshoe Mountain (3660 m) in southwestern Colorado was studied by analyzing infiltrating waters in the soil and associated solid phases. Infiltrating waters exhibit anomalously high potassium...