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dihedral angles

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Journal Article
Journal: Geology
Published: 01 September 2012
Geology (2012) 40 (9): 795-798.
...Marian B. Holness; Chris Richardson; Rosalind T. Helz Abstract The geometry of clinopyroxene-plagioclase-plagioclase junctions in mafic rocks, measured by the median dihedral angle Θ cpp , is created during solidification. In the solidifying Kilauea Iki (Hawaii) lava lake, the wider junctions...
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Journal Article
Journal: Geology
Published: 01 May 1996
Geology (1996) 24 (5): 431-434.
... of the dihedral angle for the (static) halite-H 2 O system at temperatures of 20 to 300 °C and pressures from atmospheric to 2 kbar. The halite-brine dihedral angle, which controls pore-fluid connectivity and hence permeability, is found to be a sensitive function of both temperature and pressure. In sedimentary...
Journal Article
Journal: Geology
Published: 01 April 1997
Geology (1997) 25 (4): 355-358.
...Michael T. Elliott; Michael J. Cheadle; Dougal A. Jerram Abstract Three-dimensional numerical simulations have been constructed to investigate the distributions of apparent dihedral angles expected in unequilibrated rock textures for comparison with those expected in equilibrated rock textures...
Journal Article
Published: 01 August 2002
The Canadian Mineralogist (2002) 40 (4): 1113-1126.
... produced “wetting” textures, as all dihedral angles between chromite and sulfide melt fall near or below the critical value of 60°, regardless of the identity or quantity of non-ferrous metal within the sulfide melt. Experiments performed at a f (O 2 ) of 10 −9.5 yielded uniformly higher dihedral angles...
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Apparent two-phase <b>dihedral</b> <b>angles</b>, Θ FeS-Ol , and three-phase interfacial ...
Published: 01 September 2013
Fig. 3 Apparent two-phase dihedral angles, Θ FeS-Ol , and three-phase interfacial angles, Θ FeS-Ol+Sil , as function of pressure. Grey shaded symbols are two-phase dihedral angles, Θ FeS-Ol , and crosshaired symbols are three-phase interfacial angles, Θ FeS-Ol+Sil . Squares are this study’s
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Apparent two-phase <b>dihedral</b> <b>angles</b>, Θ FeS-Ol , and three-phase interfacial ...
Published: 01 September 2013
Fig. 4 Apparent two-phase dihedral angles, Θ FeS-Ol , and three-phase interfacial angles, Θ FeS-Ol+Sil , of set-2 experiments at constant pressure (2 GPa) and temperature (1500 °C) as function of FeS grain sizes (set-2a experiments, triangles), of silicate melt fractions (set-2b experiments
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Histograms showing the variation of <b>dihedral</b> <b>angles</b> of galena (a, b), pyrrh...
Published: 01 August 2011
Fig. 8 Histograms showing the variation of dihedral angles of galena (a, b), pyrrhotite (c, d), and chalcopyrite (e, f) against sphalerite-sphalerite boundaries for samples BH-7 and 209. Estimates of the equilibrium angles as measured by Stanton (1965) are shown in dashed lines
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Frequency distribution of <b>dihedral</b> <b>angles</b> at triple junctions (cumulative p...
Published: 01 October 2007
Fig. 8. Frequency distribution of dihedral angles at triple junctions (cumulative percentage). Open circles: statically recrystallized plagioclase from an orthogneiss (Sesia Zone, Western Alps), annealed at ~ 560°C (after Kruhl, 2001 ); dots: quartz oolite, surface temperature (modified
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Calibrations of <b>dihedral</b> <b>angles</b> for sphalerite (𝛉 sp ), pyrrhotite (𝛉 po ...
Published: 01 October 2002
F igure 4. Calibrations of dihedral angles for sphalerite (𝛉 sp ), pyrrhotite (𝛉 po ) and galena (𝛉 gn ) vs. temperature (K). The inset shows the gn - T data of Stanton and Gorman (1968) .
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Comparison of <b>dihedral</b> <b>angles</b> between chromite and sulfide melt with those ...
Published: 01 August 2002
F ig . 7. Comparison of dihedral angles between chromite and sulfide melt with those for olivine ( Rose & Brenan 2001 ), at f (O 2 ) = 10 −8.8 and over the same range of melt composition. Measured dihedral angles are on average ~13° lower for chromite than for olivine. The error on metal
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Figure 4. Cumulative frequency curve of measured apparent <b>dihedral</b> <b>angles</b>. ...
in > Geology
Published: 01 January 2000
Figure 4. Cumulative frequency curve of measured apparent dihedral angles. Median value (27°) represents true dihedral angle (see Riegger and van Vlack, 1960 , for discussion of this statistical approach).
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<b>Dihedral</b> <b>angles</b> δandϕ suggested by Muetterties and Guggenberger for geometr...
Published: 01 January 2000
T able 4. Dihedral angles δandϕ suggested by Muetterties and Guggenberger for geometrically defining an eight-coordination polyhedron Torsion angles Notes: In gearksutite the labels a, b, c, d, e, f, g, and h correspond to OW‡, F1, F3*, F3, F2, OW, F4, and F4
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<b>Dihedral</b> <b>angles</b> δandϕ suggested by Muetterties and Guggenberger for geometr...
Published: 01 January 2000
T able 4. Dihedral angles δandϕ suggested by Muetterties and Guggenberger for geometrically defining an eight-coordination polyhedron Torsion angles Notes: In gearksutite the labels a, b, c, d, e, f, g, and h correspond to OW‡, F1, F3*, F3, F2, OW, F4, and F4
Image
<b>Dihedral</b> <b>angles</b> δandϕ suggested by Muetterties and Guggenberger for geometr...
Published: 01 January 2000
T able 4. Dihedral angles δandϕ suggested by Muetterties and Guggenberger for geometrically defining an eight-coordination polyhedron Torsion angles Notes: In gearksutite the labels a, b, c, d, e, f, g, and h correspond to OW‡, F1, F3*, F3, F2, OW, F4, and F4
Image
<b>Dihedral</b> <b>angles</b> δandϕ suggested by Muetterties and Guggenberger for geometr...
Published: 01 January 2000
T able 4. Dihedral angles δandϕ suggested by Muetterties and Guggenberger for geometrically defining an eight-coordination polyhedron Torsion angles Notes: In gearksutite the labels a, b, c, d, e, f, g, and h correspond to OW‡, F1, F3*, F3, F2, OW, F4, and F4
Journal Article
Journal: Geology
Published: 01 November 1997
Geology (1997) 25 (11): 1055.
Journal Article
Published: 01 October 1992
Journal of the Geological Society (1992) 149 (5): 793-802.
... stress (σ 1 ), with dihedral angles usually of about 50°, as predicted by the Coulomb theory of failure. In layered rocks, the geometry of faults varies with the orientation of layering with respect to the stress field. Where σ 1 , is approximately normal to layering or anisotropy, conjugate faults also...
Journal Article
Published: 01 June 1978
Journal of the Geological Society (1978) 135 (3): 339-347.
..., and small faults are arranged symmetrically about the en echelon graben. During the development of the five sets comprising System 1 there was elongation perpendicular to graben and the formation of a single set of extension fractures, and two subsystems of small dihedral angle sets in the shear-extension...
Journal Article
Published: 01 December 1989
Journal of the Geological Society (1989) 146 (6): 917-920.
...MARIAN B. HOLNESS; M. J. BICKLE; B. HARTE Abstract In the aureole of the Beinn an Dubhaich granite, forsterite grew with dihedral angles of less than 110° against calcite, but was progressively and variably annealed towards the equilibrium dihedral angle of 165°. New experimental estimates...
Journal Article
Published: 01 October 1966
Canadian Journal of Earth Sciences (1966) 3 (5): 579-596.
... 3 and J 4 sets as conjugate shear sets. Each J 2 set represents conjugate shear sets with a dihedral angle too small to allow their separation. J 2 , J 3 , and J 4 sets are older than J 1 sets. By analogy with experimentally produced internal fractures, the easterly decrease in dihedral angle...