DebonCalc {GCDkit}R Documentation

Calculation: Debon and Le Fort

Description

Recalculates whole-rock analyses to Debon & Le Fort's values.

Usage

DebonCalc(millicats=milli)

Arguments

millicats

a numeric matrix with millications to be used for calculation.

Details

All the parameters are based on millications (1000 gram-atoms per 100 grams).

P = K - (Na + Ca); represents the proportion of K-feldspar to plagioclase

Q = Si / 3 - (K + Na + 2 * Ca / 3); corresponds to quartz content

A = Al - (K + Na + 2 Ca); expresses alumina saturation

B = Fe + Mg + Ti; proportional to the amount of dark minerals

F = 555 - (Q + B); represents the proportion of feldspars

(Na+K)

K/(Na+K)

Mg/(Fe+Mg); serves to distinguish between ferriferous and magnesian associations

Q(quartz)

B(dark m.)

F(feldsp)

The Q - B - F ternary plot expresses the balance of dark minerals, feldspars and quartz.

For details, see Debon & Le Fort (1983) or (1988).

Value

results

numerical matrix with the above specified results

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz

References

Debon F & Le Fort P (1983) A chemical-mineralogical classification of common plutonic rocks and associations. Trans Roy Soc Edinb; Earth Sci 73: 135-149

Debon F & Le Fort P (1988) A cationic classification of common plutonic rocks and their magmatic associations: principles, method, applications. Bull Mineral 111: 493-511

See Also

Debon


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