The Petrography of Some Kainozoic Igneous Rocks, and of the Cape Parry Alkaline Complex, East Greenland

• Published in: Geological Magazine
• Main Author: Tyrrell, G. W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1932
• Subjects: Greenland; Parry; Wordie; Cape Parry; East Greenland
• Online Access: http://dx.doi.org/10.1017/s0016756800098290; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800098290

IN this paper it is proposed to give a brief account of the petrography of the Kainozoic igneous rocks collected by Mr. J. M. Wordie during the Cambridge Expedition to East Greenland led by him in 1926. A small collection of alkaline igneous rocks, but of less certain age, was also made from Cape Parry, and is briefly dealt with in this paper. As Mr. Wordie has written a short note on the geology of the Tertiary igneous rocks in his geographical paper, and as Dr. H. G. Backlund intends shortly to publish a much more comprehensive account of Tertiary igneous activity and rocks in East Greenland than is possible on the basis of the materials collected by the Cambridge Expedition, this paper aims only at making a brief record of the petrographical characters of the collection, and especially at recording three new chemical analyses, two of the Kainozoic basalts, and one of a riebeckitetrachyte from the Cape Parry alkaline complex. For the most recent account of the general geology of East Greenland, and for a connected summary of the Kainozoic igneous rocks collected by other expeditions, the reader is referred to memoirs by L. Koch and H. G. Backlund.