Relationships between the petrophysical properties density, seismic velocity, heat generation, and mineralogical constitution

Details Relationships between the petrophysical properties density, seismic velocity, heat generation, and mineralogical constitution Relationships between the petrophysical properties density, seismic velocity, heat generation, and mineralogical constitution

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..57..367r&link_type=abstract

Earth and Planetary Science Letters, Volume 57, Issue 2, p. 367-376.

Physics

37

Scientific paper

The petrophysical properties density (ϱ), compressional wave velocity (υp), and heat generation (A) exhibit considerable variation with rock type. To characterize a given rock quantitatively, a single parameter, the cation fraction (expressed by the k-value) has been found to be suited best. 100 cryastalline rocks have been sampled to cover the widest possible range in k-value, from silicic types like granophyres and granites through granodiorites, tonalites, diorites, gabbros, amphibolites, hornblendites, pyroxenites, to ultrabasic rocks. ϱ, k, A and νp were determined experimentally, the latter at 0.5 kbar (50 MPa).
The interrelations between these properties were established by regression analysis. The relation ϱ(k) and ϱp(k) show a linear dependence whereas A(k), A(ϱ) and A(νp) follow exponential laws: A(μW/m3)=12.20-230.5k (mole/cm3); ln A = 22.5-8.15ϱ (g/cm3), and ln A = 16.5-2.74νp(km/s). All correlation coefficients are better than 0.9.

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