The Theory of Thin-Section Analysis: A Discussion

Terms usedGrog relates to clay inclusions within the pottery which appear as discrete pieces of varying sizes. Usually such entities are assumed to be crushed parts of pre-existing pots.Sizes of quartz, grog, shell or other inclusions referred to in the analysis concern measurements taken on the longest axis of the grain or piece. In each case the maximum measurement stated is the longest observed in that particular section, and does not infer that other grains in the sample were all of this size, unless stated.Percentages of materials shown as included in the clay matrix are estimates expressed by area using comparison charts (Terry and Chilingar 1955, and Flugel 1982, 247-257).

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Thin-section analysis as a tool to aid identification of palaeoearthquakes on the “slow”, active Geleen Fault, Roer Valley Graben

Tectonophysics ◽

10.1016/j.tecto.2007.10.011 ◽

2008 ◽

Vol 453 (1-4) ◽

pp. 94-109 ◽

Cited By ~ 9

Author(s):

Kris Vanneste ◽

Florias Mees ◽

Koen Verbeeck

Keyword(s):

Thin Section ◽

Roer Valley Graben ◽

Thin Section Analysis ◽

Section Analysis

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The Holmes effect and the lower limit of modal analysis

Mineralogical Magazine and Journal of the Mineralogical Society ◽

10.1180/minmag.1956.031.234.09 ◽

1956 ◽

Vol 31 (234) ◽

pp. 276-281 ◽

Cited By ~ 2

Author(s):

F. Chayes

Keyword(s):

Modal Analysis ◽

Lower Limit ◽

Thin Section ◽

Transmitted Light ◽

Apparent Area ◽

Measurement Surface ◽

Areal Measurement ◽

Thin Section Analysis ◽

Measurement Area ◽

Section Analysis

SummaryThin-section analysis is essentially an areal measurement, the measurement area usually being the upper surface of the section. If transmitted light is used for the measurement, the apparent areas of opaque grains will in general be somewhat larger than their true areas on the measurement surface. For strictly spherical opaque particles in a transparent matrix the expected excess of apparent over true area is shown to be (πr2k)/(2r + k) where r is the spherical radius and κ is the thickness of the thin section. A table shows the relation between true and apparent area as a function of r/k.

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