Economic Geology; March 2005; v. 100; no. 2;
p. 401-402; DOI: 10.2113/100.2.401
© 2005 Society of Economic Geologists
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Ore Textures. Volumes 15. R. G. TAYLOR. Economic Geology Research
Unit, Geology Department, James Cook University of North Queensland. 1992, 1994,
1998, 2000, 2003. Price AUD$44 each volume.
A series of slim (2458 pages), A4-sized, stapled volumes on ore textures
has been published in recent years1992, 1994, 1998, 2000, 2003. Volume 4 was
recently reviewed in detail (Mason, 2001). The author adopts the useful
instructional method of hand specimen and hand lens rock sample descriptions and
interpretations that are keyed to large color photographs, which are mostly of
sawn and polished rock slabs. The high quality of the photographs is the best
feature of the series.
In Volume 1 (Infill), the material is well organized (1: Introduction; 2:
Recognition criteria; 2.1: Incomplete infill; 2.2: Complete infill; 3: Problems
and working techniques; 3.1: Common misconceptions; 3.2: Problem with the
euhedral crystal criterion; 3.3: The edge problem; 3.4: The working-backwards
technique; 4: Channelway recognition; 4.1: General approach; 4.2: Vein styles;
4.3: Breccia styles; 4.4: Other styles; 5: Acknowledgements). Textual material,
accompanying the 23 plates (~1/4-page in size), is written simply and with clear
interpretations. The author exercises admirable restraint in limiting himself to
the observable physical nature of the rocks. No attempt is made to extend the
interpretations to geochemical or other aspects of hydrothermal fluids
responsible for the infilling minerals, which would have generated unwarranted
further interpretation. Examples of infill in granitoid rocks ("miarolitic
cavities," "igneous interstitial mineralisation,"
"dissolution within granite") are particularly welcome because they
are uncommonly illustrated, particularly in such graphic detail. There is an
emphasis on granitoid-related tin environments, many from within Australia, but
some from South Africa, which reflects the authors experience. Some other
examples are taken from epithermal Au-Agbase metals systems of the western
United States and base metal deposits of Queensland. . . . [Full Text of this Article]
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