Results 71 to 80 of about 542 (136)

PETROGENESIS OF THE METACARBONATE AND RELATED ROCKS OF THE SILGARÁ FORMATION, CENTRAL SANTANDER MASSIF, COLOMBIAN ANDES: AN OVERVIEW OF A “REACTION CALCIC EXOSCARN”

Earth Sciences Research Journal, 2008
Metacarbonate rocks (pure and impure marbles, carbonate-silicate rocks, calc-silicate rocks and carbonate-bearing silicate rocks) form a very complex group within the metamorphic sequence of the Silgará Formation at the central Santander Massif (CSM ...
Castellanos O.M, Gómez S.I., Ríos C.A., Ávila G.A.   +3 more
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Experimental Deformation of Epidotes [PDF]

Texture, Stress, and Microstructure, 1974
E. Ilkhani, P. Paulitsch
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The Structure of Epidote

Proceedings of the Japan Academy, 1945
ITO, Teiichi, SAWADA, Hirosada
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Oxygen isotopes internal equilibrium in magmatic epidote-bearing granitoids

Anais da Academia Brasileira de Ciências, 2002
VALDEREZ P. FERREIRA, JOHN W. VALLEY, ALCIDES N. SIAL, MICHAEL J. SPICUZZA   +3 more
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Mineralogy: The epidote jigsaw [PDF]

Nature, 1983
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A Study on the Polarization of Epidote

A Study on the Polarization of Epidote
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Magmatic Epidote

Reviews in Mineralogy and Geochemistry, 2004
Epidote was first recognized as a magmatic mineral in the alpine Bergell tonalite by Cornelius (1915). Field observations and microscopic textures let Cornelius to conclude "... the only possibility is, that epidote is a primary mineral in our tonalite, crystallizing early from the magma, i.e., before (in part also contemporaneous with) biotite ...
M. W. Schmidt, S. Poli
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Spectroscopy of Epidote Minerals

Reviews in Mineralogy and Geochemistry, 2004
Numerous spectroscopic techniques have been applied to the epidote minerals to characterize their structure and crystal chemistry. The substitution of transition metal ions Mn, Cr, and V, besides Fe, in the different crystallographic sites of epidote minerals and with different valence states has been studied by optical absorption spectroscopy.
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Experimental hydrogen isotope studies, II. Fractionations in the systems epidote-NaCl-H2O, epidote-CaCl2-H2O and epidote-seawater, and the hydrogen isotope composition of natural epidotes

Earth and Planetary Science Letters, 1980
Abstract The hydrogen isotope fractionation factors between epidote and aqueous 1 M and 4 M NaCl, 1 M CaCl 2 solutions, and between epidote and seawater, have been measured over the temperature range 250–550°C over which the degree of dissociation of dissolved species varies significantly. Measured fractionations at 350°C are decreased by up to 12‰,
Colin M. Graham, Simon M.F. Sheppard
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A Note on the Crystallography of Epidote

Mineralogical Magazine and Journal of the Mineralogical Society, 1950
In any monoclinic crystal, the zone–axis [uvw] is perpendicular to the plane (hkl) if u/(hc2–lac cos β) = v/(kc2a2sin2β) = w/(la2–hac cos β). In particular, the normal to the face (100) is quasi–parallel to the zoneaxis [r01̄] if c/(a cosβ) approximates to a rational number r.Epidote has a:b:c = 1•5807:1:1•8057,β 115° 24', and is often twinned on a(100)
J. Hornstra, P. Terpstra
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