scholarly journals Computerized database of the optical properties of the opaque minerals [Compiled from "Tables for microscope identification of Ore minerals", by Uytenbogaardt and Burke]

1988 ◽  
Author(s):  
Joseph F. Whelan
Keyword(s):  
Optical Properties ◽  
Ore Minerals ◽  
Opaque Minerals

Some relationships between the reflectivities of sulphide ore-minerals

1933 ◽  
Vol 23 (143) ◽  
pp. 458-462 ◽  
Author(s):  
F. Coles Phillips
Keyword(s):  
Optical Properties ◽  
Rapid Development ◽  
Direct Determination ◽  
Quantitative Measure ◽  
Sulphide Ore ◽  
Ore Minerals ◽  
Reflection Of Light ◽  
Opaque Minerals ◽  
Made In

Since the early work of Dmde and others on the reflection of light by opaque crystalline media, little progress has been made in the direct determination of the indices of refraction and absorption for such substances. Interest in the optical properties of the opaque minerals, however, has been greatly stimulated by the rapid development in the last few years of the methods of ore-microscopy first brought into prominence by Campbell in 1906. Full theoretical discussions have been given recently by Berek, Koenigsberger, and others, but the only quantitative measure feasible in routine microscopy at present is that of the reflectivity.

Contribution to the study of ore minerals in some igneous rocks from Assynt

1961 ◽  
Vol 32 (253) ◽  
pp. 767-777 ◽  
Author(s):  
E. F. Stumpfl
Keyword(s):  
Igneous Rocks ◽  
Dyke Rock ◽  
Ti Oxides ◽  
Ore Minerals ◽  
Oxide Minerals ◽  
Opaque Minerals ◽  
Limestone Assimilation ◽  
Hydrothermal Sulphide

SummaryThe parageneses of opaque minerals in three Assynt rocks are described. A biotite-diorite dyke-rock of Lewisian age is characterized by a primary igneous assemblage of Fe-Ti oxides, pyrrhotine, and pentlandite. Effects of metamorphism are recognized, particularly in the oxidation of ilmenite in a Lewisian epidiorite dyke-rock. Cromaltite contains a primary assemblage of oxide minerals together with a later hydrothermal sulphide assemblage. Evidence from the opaque minerals cannot be reconciled with a theory of limestone assimilation. The correlation of the distribution of Co, Ni, and Cu in the rocks with the opaque minerals present is considered.

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