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mica

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Journal Article
Journal: Geology
Published: 01 July 1983
Geology (1983) 11 (7): 432.
Journal Article
Published: 01 February 1981
Canadian Journal of Earth Sciences (1981) 18 (2): 386–394.
...P. H. Reynolds; M. Zentilli; G. K. Muecke Abstract K–Ar and (or) 40 Ar/ 39 Ar apparent ages are reported for 28 samples of biotite and muscovite from Nova Scotia's South Mountain batholith and associated northern satellite stocks. In addition, 14 mica samples from the southern satellite stocks were...
Journal Article
Journal: Economic Geology
Published: 01 December 1980
Economic Geology (1980) 75 (8): 1127–1137.
... of the hydrothermal fluid. Log (f (sub H 2 O) /f HF ) values have been calculated at an assumed final temperature of exchange of 350 degrees C, and they indicate that, within the ore-body, the fugacity ratio averages about 3.9 for all varieties of mica. There is a progressive increase in the fugacity ratio...
Journal Article
Journal: Economic Geology
Published: 01 October 1980
Economic Geology (1980) 75 (6): 830–844.
Journal Article
Journal: Economic Geology
Published: 01 August 1980
Economic Geology (1980) 75 (5): 752–759.
...A. N. Halliday Abstract The exact timing of main stage mineralization in southwest England has never been certain. K-Ar ages for micas and feldspars from a metallized pegmatite are discordant but suggest formation at about 285 m.y. The K-Ar ages of micas from greisens are also discordant...
Journal Article
Published: 01 June 1980
Clays and Clay Minerals (1980) 28 (3): 230–232.
Journal Article
Published: 01 April 1980
Clays and Clay Minerals (1980) 28 (2): 142–148.
Journal Article
Journal: Geology
Published: 01 January 1980
Geology (1980) 8 (1): 27–31.
Journal Article
Published: 01 December 1979
American Mineralogist (1979) 64 (11-12): 1311.
...E. R. Whipple Abstract J. Jakob (1937) published analyses of three micas which he claimed contained trivalent titanium. His basis for this claim was that these micas contained more reducing power (Fe 2+ ) than total iron and he attributed the excess reducing power to trivalent titanium. Copyright...
Journal Article
Published: 01 September 1979
Canadian Journal of Earth Sciences (1979) 16 (9): 1789–1804.
... of markedly different ages and lithologies.The entire schist terrane was metamorphosed to greenschist facies in Mesozoic time, probably as a result of Jurassic–Cretaceous northward overthrusting of oceanic crust and upper mantle, resulting in the resetting of most K–Ar mica ages to the mid-Cretaceous...
Journal Article
Published: 01 June 1979
Clays and Clay Minerals (1979) 27 (3): 213–223.
Journal Article
Published: 01 April 1979
Clays and Clay Minerals (1979) 27 (2): 113–118.
Journal Article
Published: 01 February 1979
Clays and Clay Minerals (1979) 27 (1): 1–10.
Journal Article
Published: 01 December 1978
American Mineralogist (1978) 63 (11-12): 1053–1073.
.... As intermediate reaction products, the new structures delineates a reaction path from anthophyllite and cummingtonite to talc. This amphibole-to-mica mechanism is not simple, but rather proceeds by reconstruction of double-chain I-beams to form alternating double and triple chains, pure triple chains, and finally...
Journal Article
Published: 01 December 1978
Canadian Journal of Earth Sciences (1978) 15 (12): 1924–1929.
Journal Article
Journal: GSA Bulletin
Published: 01 December 1978
GSA Bulletin (1978) 89 (12): 1715–1718.
...ROBERT P. WINTSCH Abstract The mineralogical and chemical changes accompanying diagenesis in Gulf Coast argillaceous sediments provide a good working model for such changes in similar sediments elsewhere. Knowledge of these reactions allows plausible explanations for mica fabric formation in mildly...
Journal Article
Published: 01 November 1978
The Canadian Mineralogist (1978) 16 (4): 591–595.
Journal Article
Published: 01 October 1978
American Mineralogist (1978) 63 (9-10): 885–892.
...R. M. Hazen; D. R. Wones Abstract A simple geometrical model of the stability limits of micas is based on the relative dimensions of octahedral and tetrahedral layers. If the tetrahedral rotation angle, α, is assumed to be limited to 0° ≤ α ≤ 12°, then the ratio of mean octahedral to mean...
Journal Article
Published: 01 October 1978
Clays and Clay Minerals (1978) 26 (5): 352–360.
Journal Article
Published: 01 August 1978
The Canadian Mineralogist (1978) 16 (3): 427–435.