29 Result(s)

Article

The sulfur and carbon isotope composition of scapolite-rich granulites from southern Tanzania

Sulfur and carbon isotope data are presented of 15 granulite samples from the Furua Complex, southern Tanzania, in which scapolite is a primary and major rock-forming constituent (up to 30 vol%). From these da...

J. Hoefs, J. J. M. Coolen, J. Touret in Contributions to Mineralogy and Petrology (1982)

Article

Buchbesprechungen

E. Kuhn-Schnyder, H. Ellenberg, J. Hoefs, C. K. Jørgensen… in The Science of Nature (1979)

Article

Kohlenstoffisotopen-Zusammensetzung von Hühnereierschalen

J. Hoefs, J. Speck in Naturwissenschaften (1979)

Article

¹³C/¹²C-Verhältnisse in menschlichen Harnkonkrementen

Oxalate, uric acid, and phosphate stones have been analyzed for their carbon isotope composition. The oxalate stones show δ¹³C values between −17.0 and −19.5‰, the uric acid stones between −14.9 and −19.4‰, and t...

J. Hoefs, Th. Armbruster in Naturwissenschaften (1978)

Article

Age-trend in carbon isotopic composition in Paleozoic sediments

D. H. Welte, W. Kalkreuth, J. Hoefs in Naturwissenschaften (1975)

Article

Fluid inclusion and carbon isotope study from bamble granulites (South Norway)

The carbon isotopic composition of CO₂ from fluid inclusions in granulite facies rocks has been determined. The “primary” carbonic fluid — most probably being of Upper Mantle origin — appears to have δ ¹³C-values...

J. Hoefs, J. Touret in Contributions to Mineralogy and Petrology (1975)

Article

Die Isotopenzusammensetzung von Dolomiten und Kalken aus dem süddeutschen Malm

On dolomites and calcites from the Malm (Upper Jurassic) formation of Southern Germany δ ¹³C and δ ¹⁸O-determinations have been done. The most striking feature of our results is that the dolomites are isotopicall...

W. Bausch, J. Hoefs in Contributions to Mineralogy and Petrology (1972)

Article

Geochemische Untersuchungen an Travertinen der Slowakei

Travertines are characterized by high rates of deposition. Waters from which travertines are precipitated have more than ten times the calcium concentration of mean continental surface waters. Calcium has been...

R. Demovič, J. Hoefs, K. H. Wedepohl in Contributions to Mineralogy and Petrology (1972)