Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-23T15:34:22.209Z Has data issue: false hasContentIssue false
  • English
  • Français

The Petrology of Katungite

Published online by Cambridge University Press:  01 May 2009

Arthur Holmes
Arthur Holmes
Affiliation:
University of Durham.
Get access Rights & Permissions [Opens in a new window]

Extract

The specimens representing the Katunga lavas are compact fine-grained porphyritic rocks of lustrous stone-grey to deep blue-grey colour, the phenocrysts being olivine (up to 3 mm. long) of various tints from nearly colourless to yellow-green, and melilite (up to 2 mm. square) in thin tabular, less conspicuous crystals which, megascopically, have a shining grey to black appearance. Some of the specimens from near the sources of the flows are internally altered and have become fawn or buff in colour, mottledby white zeolitic specks and reddish brown ferruginous pseudomorphs after olivine and melilite. Some weathered specimens have a brown ochreous crust, but within this the rock is normally fresh.

Type
Original Articles
Information
Geological Magazine , Volume 74 , Issue 5 , May 1937 , pp. 200 - 219
Copyright
Copyright © Cambridge University Press 1937

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

BIBLIOGRAPHY

Beliankin, D. “On the Term ‘Rock’ and on Petrographical Classification and Nomenclature,” Trav. Musée Min., Acad. Sci. U.S.S.R., iii, 1929, 3–15.Google Scholar
Berman, H. “Composition of the Melilite Group,” Am. Min., xiv, 1929, 389–407.Google Scholar
Bowen, N. L. “Genetic Features of Alnoitic Rocks at Isle Cadieux, Quebec,” Am. J. Sci. (5), iii, 1922, 1–34.CrossRefGoogle Scholar
Bowen, N. L. “The Genesis of Melilite,” Journ. Wash. Acad. Sci., xiii, 1923, 1–4.Google Scholar
Bowen, N. L., and Ellestad, R. B. “Nepheline Contrasts,” Am. Min., xxi, 1936, 363–8.Google Scholar
Brögger, W. C. “Die Eruptivgesteine des Kristianiagebietes. IV. Das Fengebiet in Telemark, Norwegen,” Videns. Skrift. I. Math-Nat. Kl. (1920, No. 9), 1921, 408.Google Scholar
Buddington, A. F. “On Some Natural and Synthetic Melilites,” Am. J. Sci. (5), iii, 1922, 35–87.CrossRefGoogle Scholar
Ferguson, J. B., and Buddington, A. F. “The Binary System Akermanite—Gehlenite,” Am. J. Sci. (4), 1, 1920, 131–140.CrossRefGoogle Scholar
Hey, M. H., and Bannister, F. A. “Studies on the Zeolites. Part IV, Ashcroftine (Kalithomsonite of S. G. Gordon),” Min. Mag., xxiii, 1933, 305–308.Google Scholar
Holmes, A. “Transfusion of Xenolithic Quartz in Alkali Basic and Ultrabasic Lavas, South-West Uganda,” Min. Mag., xxiv, 1936, 408–421.Google Scholar
Holmes, A. “A Contribution to the Petrology of Kimberlite and its Inclusions,” Trans. Oeol. Soc. South Africa (1936), xxxix, 1937, 379–428.Google Scholar
Holmes, A. and Harwood, H. F. “Petrology of the Volcanic Fields East and South-East of Ruwenzori, Uganda,” Quart. Journ. Geol. Soc., lxxxviii,1932, 370–442.CrossRefGoogle Scholar
Holmes, A. and Harwood, H. F. “The Volcanic Area of Bufumbira. Part II, The Petrology of the Volcanic Field of Bufumbira, South-West Uganda, and of Other Parts of the Birunga Field,” Geol. Surv. Uganda, Mem. III. part ii, 1937, pp. 300.Google Scholar
Reynolds, Doris L. “The Genetic Significance of Biotite-Pyroxenite and Hornblendite,” Min. Pet. Mitt., xlvi, 1935, 447–490.Google Scholar
Reynolds, Doris L. “Demonstrations in Petrogenesis from Kiloran Bay, Colonsay. I. The Transfusion of Quartzite,” Min. Mag., xxiv, 1936, 367–407.Google Scholar
Ross, C. S. “Nephelite-hauynite-Alnoite from Winnett, Montana,” Am. J. Sci. (5), xi, 218–227.Google Scholar
Sabatini, V. “I Vulcani di S. Venanzo,” Bivista d. Min. Crist. Italiana, xxii, 1899, 3–12.Google Scholar
Scheumann, K. H. “Petrographische Untersuchungen an Gesteinen des Polzengebietes in Nord-Böhmen,” Abhandl. Ges. Wiss. Univ. Leipzig, xxxii (7), 1912, 607–776.Google Scholar
Scheumann, K. H. “Zur Genese alkaliseh-lamprophyrischer Ganggesteine,” Centralbl. f. Min. Geol. Pal., 1922, 495–545.Google Scholar
Shand, S. J. “Eruptive Rock Names,” GEOL. MAG., LXXII, 1935, 382–3.CrossRefGoogle Scholar
Stansfield, J. “Extensions of the Monteregian Petrological Province to the West and North-West,” GEOL. MAG., LX, 1923, 433–453.CrossRefGoogle Scholar
Stansfield, J. “Nomenclature and Relations of the Lamprophyres,” GEOL. MAG., 550–554.Google Scholar
Tröger, W. E. “Quantitative Daten einiger magmatischer Gesteine,” Min. Pet. Mitt., xlvi, 1934, 153–173.Google Scholar
Tröger, W. E. Specielle Petrographie der Eruptivgesteine: Ein Nomenklatur-Kompendium, Berlin, 1935, pp. 360.Google Scholar
Schwarz, H. “Über die Auswürflinge von kristallinen Schiefern und Tiefengesteinen in den Vulkanembryonen der Schwabischen Alb.,” Jahresheft Vereins pat. Naturkunde Württemberg, lxi, 1905, 227–288.Google Scholar