Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-27T08:32:02.907Z Has data issue: false hasContentIssue false

The Clinopyroxenes of a Differentiated Teschenite Sill Near Gunnedah, New South Wales

Published online by Cambridge University Press:  01 May 2009

J. F. G. Wilkinson
Affiliation:
Department of Geology, University of New England, Armidale, N.S.W.

Abstract

Optical and chemical data are presented on the clinopyroxenes (titaniferous salites) from a differentiated teschenite sill. The range of clinopyroxene composition is close to the limits, Ca49Mg37Fe14 to Ca47Mg33Fe20. Attention is directed to the clinopyroxene compositions and zoning in their relation to the parent rocks and associated minerals.

Type
Articles
Copyright
Copyright © Cambridge University Press 1957

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

REFERENCES

Allen, D. A., 1924. The Igneous Geology of the Burntisland District. Trans. Roy. Soc. Edin., liii, 479501.Google Scholar
Allen, D. A., 1931. A Nepheline-basanite Sill at Fordell, Fife. Proc. Liverpool Geol. Ass., xv, 309317.Google Scholar
Barth, T. F. W., 1931. Pyroxen von Hiva Oa, Marquesas Inseln und die Formel titanhaltigen Augite. Neu. Jahrb. Min. Geol. Pal., lxiv, Abt. A, 217224.Google Scholar
Barth, T. F. W., 1931a. Mineralogical Petrography of Pacific Lavas. Amer. Journ. Sci., xxi, 377405, 491530.CrossRefGoogle Scholar
Benson, W. N., 1944. The Basic Igneous Rocks of Eastern Otago and their Tectonic Environment, Part IV. Trans. Roy. Soc. N.Z., lxxiv, 71123.Google Scholar
Benson, W. N., and Turner, F. J., 1939. Comparative Composition—Variation Diagrams for the Cainozoic Igneous Rocks of New Zealand, with determinations of the Optic Axial Angles of the Pyroxenes and Olivines contained therein. Trans. Roy. Soc. N.Z., lxix, 5672.Google Scholar
Bowen, N. L., 1914. The Ternary System Diopside-Forsterite-Silica. Amer. Journ. Sci., xxxviii, 207264.CrossRefGoogle Scholar
Bowen, N. L., 1928. The Evolution of the Igneous Rocks. Princeton Univ. Press.Google Scholar
Deer, W. A., and Wager, L. R., 1938. Two New Pyroxenes Included in the System Clinoenstatite, Clinoferrosilite, Diopside and Heden-bergite. Miner. Mag., xxv, 1522.Google Scholar
Dixon, B. E., and Kennedy, W. Q., 1933. Optically Uniaxial Titanaugite from Aberdeenshire. Z. Krystallogr., lxxxvi, 112130.CrossRefGoogle Scholar
Edwards, A. B., 1942. Differentiation of the Dolerites of Tasmania. Journ. Geol., 1, 451480, 579610.CrossRefGoogle Scholar
Fenner, C. N., 1926. The Katmai Magmatic Province. Journ. Geol., xxxiv, 673772.CrossRefGoogle Scholar
Flett, J. S., 1930. The Teschenite of Easter Dalmeny. Summ. Prog. Geol. Surv. for 1929, Pt. iii, 5974.Google Scholar
Goranson, R. W., 1927. Aegirite from Libby, Montana. Amer. Miner., xii, 3739.Google Scholar
Hess, H. H., 1949. Chemical Composition and Optical Properties of Common Clinopyroxenes: Part I., Amer. Miner., xxxiv, 621666.Google Scholar
Hutton, C. O., 1943. The Igneous Rocks of the Brocken Range–Ngahape Area, Eastern Wellington, Trans. Roy. Soc. N.Z., lxxii, 353370.Google Scholar
Krokström, T., 1937. The Hällefors Dolerite Dyke and some Problems of Basaltic Rocks. Bull. Geol. Inst. Univ. Upsala, xxvi, 113263.Google Scholar
Kuno, H., 1936. Petrological Notes on some Pyroxene-Andesites from Hakone Volcano, with special reference to some Types with Pigeonite Phenocrysts. Jap. Journ. Geol. Geog., xiii, 107140.Google Scholar
Muir, I. D., 1951. The Clinopyroxenes of the Skaergaard Intrusion, Eastern Greenland. Miner. Mag., xxix, 690714.Google Scholar
Murray, R. J., 1954. The Clinopyroxenes of the Garbh Eilean Sill, Shiant Isles, Geol. Mag., xci, 1731.CrossRefGoogle Scholar
Sahama, K., and Rankama, Th. G., 1950. Geochemistry. Univ. Chicago Press.Google Scholar
Segnit, E. R., 1953. Some Data on Synthetic Aluminous and other Pyroxenes. Miner. Mag., xxx, 218226.Google Scholar
Tomita, T., 1934. Variations in the Optical Properties, according to Chemical Composition, in Pyroxenes of the Clinoenstatite-Clinohypersthene-Diopside-Hedenbergite System. Journ. Shang. Sci. Inst., I, ii, 4158.Google Scholar
Walker, F., 1930. The Geology of the Shiant Isles (Hebrides). Quart. Journ. Geol. Soc., lxxxvi, 355398.CrossRefGoogle Scholar
Walker, F., and Poldervaart, A., 1949. Karroo Dolerites of the Union of South Africa. Bull. Geol. Soc. Amer., lx, 591706.CrossRefGoogle Scholar
Wilkinson, J. F. G., 1956a. The Olivines of a Differentiated Teschenite Sill near Gunnedah, New South Wales. Geol. Mag., xciii, 441455.CrossRefGoogle Scholar
Wilkinson, J. F. G., 1956b. Clinopyroxenes of Alkali Olivine–Basalt Magma. Amer. Min., xli, 724743.Google Scholar
Wright, F. E., 1951. Computation of the Optic Axial Angle from the Three Principal Refractive Indices. Amer. Min., xxxvi, 543556.Google Scholar
Yagi, K., 1953. Petrochemical Studies on the Alkaline Rocks of the Moroto District, Sakhalin. Bull. Geol. Soc. Amer., lxiv, 769810.CrossRefGoogle Scholar