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corundum

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Journal Article
Journal: Geology
Published: 01 February 2002
Geology (2002) 30 (2): 119-122.
... bauxites during prograde regional metamorphism. Dehydration experiments were started with fine-grained natural diasporite embedded in marble. The samples were first annealed in the diaspore stability field, then slowly brought to the final pressure-temperature ( P - T ) conditions in the corundum field...
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Journal Article
Published: 01 November 2000
American Mineralogist (2000) 85 (11-12): 1617-1624.
...William A. Ranson Abstract Phyllites from the Charlotte belt (Central Piedmont) of South Carolina contain porphyroblasts of black corundum in a matrix of margarite and minor muscovite. The margarite-corundum phyllites formed during Ordovician (?) amphibolite facies metamorphism of an aluminous...
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Journal Article
Published: 01 June 1999
American Mineralogist (1999) 84 (5-6): 977-982.
... surrounded by Proterozoic metasediments near the Blengsvatn, Bamble sector, southern Norway. The preiswerkite occurs as subhedral crystals or is intergrown with biotite in a polygonal fabric together with Cl-rich scapolite+tourmaline+ or -ilmenite+ or -plagioclase+ or -corundum. Accessory minerals...
Journal Article
Published: 01 June 1998
Mineralogical Magazine (1998) 62 (3): 325-332.
Journal Article
Published: 01 August 1996
European Journal of Mineralogy (1996) 8 (4): 777-789.
Journal Article
Published: 01 August 1996
Mineralogical Magazine (1996) 60 (4): 623-638.
Journal Article
Published: 01 October 1995
European Journal of Mineralogy (1995) 7 (5): 1183-1203.
Journal Article
Published: 01 September 1995
Mineralogical Magazine (1995) 59 (3): 465-479.
Journal Article
Published: 01 September 1994
Mineralogical Magazine (1994) 58 (3): 490-492.
Journal Article
Published: 01 August 1994
Clays and Clay Minerals (1994) 42 (4): 485-488.
Journal Article
Published: 01 June 1994
Mineralogical Magazine (1994) 58 (2): 247-258.
Journal Article
Published: 01 June 1993
European Journal of Mineralogy (1993) 5 (3): 537-543.
Series: GSA Special Papers
Published: 01 January 1990
DOI: 10.1130/SPE248-p1
... residues showed a great range (e.g., Si, 3.5 to 42.5 wt %; Ca, 0.15 to 34.4 wt %; Mg, 0.17 to 20.3 wt %). Mineralogies of LTA residues also varied greatly. Quartz was present in all samples, generally as the dominant crystalline component. Corundum and bassanite, artifacts of the low-temperature ashing...
Journal Article
Published: 01 February 1988
American Mineralogist (1988) 73 (1-2): 48-56.
...Masaki Enami; Qijia Zang Abstract Magnesian staurolite of X Mg = 0.68-0.74 was found in garnet-corundum rocks and eclogite from the Donghai district, Jiangsu province, east China. The garnet-corundum rocks consist mainly of primary garnet, corundum, zoisite, and Na-rich phlogopite (Na 2 O = 2.7...
Journal Article
Published: 01 February 1987
American Mineralogist (1987) 72 (1-2): 29-38.
... of primary plagioclase, corundum, and biotite in the xenolith by epidote, margarite, and muscovite. Compositional relations within the metamorphic mineral assemblage, together with logarithmic activity and fugacity phase diagrams in the system Na 2 O-K 2 O-CaO-FeO-MgO-Fe 2 O 3 -Al 2 O 3 -SiO 2 -H 2 O, define...
Journal Article
Published: 01 July 1984
Geological Magazine (1984) 121 (4): 301-311.
... with sedimentary rocks. The strongly peraluminous character of the granitoids is shown by high normative corundum and high molar Al 2 O 3 /(CaO+Na 2 O+K 2 O) ratio, and is reflected by the occasional presence of aluminosilicates. The mineralogical and chemical characteristics of the granitoids are similar to those...
Journal Article
Journal: Economic Geology
Published: 01 May 1984
Economic Geology (1984) 79 (3): 573-579.
Journal Article
Published: 01 August 1982
American Mineralogist (1982) 67 (7-8): 725-735.
...Niranjan D. Chatterjee; Hans Leistner; Ludger Terhart; Kurt Abraham; Rolf Klaska Abstract Corundum–eskolaite, α –(Al,Cr) 2 O 3 , crystalline solutions with compositions in the range O < X Cr 2 O 3 < 1 have been synthesized at 25 kbar P H 2 O and 1070° C. Homogeneity of the crystals...
Journal Article
Journal: Economic Geology
Published: 01 August 1981
Economic Geology (1981) 76 (5): 1216-1225.
Journal Article
Journal: Economic Geology
Published: 01 November 1967
Economic Geology (1967) 62 (7): 983-991.
...F. W. Solesbury Abstract Mafic pegmatites cut serpentinite in Precambrian gneisses. Three varieties contain (a) vermiculite only; (b) vermiculite and corundum; or (c) calcic plagioclase, vermiculite, and corundum (plumasitic type). Chemical compositions suggest a trend from anorthosite through...