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Papers from the Department of Geology Volume 3; No. 5; No. 8 (Paperback) Loot Price: R384
Discovery Miles 3 840
Papers from the Department of Geology Volume 3; No. 5; No. 8 (Paperback): Department of Geology

Papers from the Department of Geology Volume 3; No. 5; No. 8 (Paperback)

Department of Geology

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Loot Price R384 Discovery Miles 3 840

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 Excerpt: ...be shown under certain conditions, they unite to form small masses of titanic iron, leads to the belief that the view of Professor Rosenbusch is correct, namely, that they consist principally of titanic iron ore or ilmenite. The transparent ones have the form of the mineral known as micaceous titanic iron ore, which Lattermannf found intergrown with magnetite in the nephelinite of the Katzenbuckel. The peculiar colour of this mineral, moreover, resembles perfectly thnt of these inclusions. The diverse results which the several investigators have obtained in the matter of the solubility of these inclusions may perhaps be explained by the titaniferous iron ore in some hand specimens being richer in titanic acid than in that of others. In this connection it must be mentioned that titanic iron ore is a mineral which is constantly found in these anorthosites in Canada, often in enormous quantities, so that it is considered as particularly characteristic of them, while in the Laurentian proper the iron ores, in the greater number of cases, contain no titanic acid. Lacroix, J Hagge, Microskopiche Unterftiichung iiber Gabbro and verwandte Gesteine, Kiel, 1871, S. 46. t Lattermann in Rosenbusch Mass. Gest, p. 786. J Lacroix--Contributions a 1-etude des gneiss & Pyroxene, p. 141--Bull. Soc. Min. France, April, 1839. who has investigated somewhat similar inclusions in certain Norwegian gabbros, which, however, are double refracting, thinks that they are pyroxene, especially as they frequently appear to be grouped together, forming larger grains which may be determined as belonging to this species: "Les grains en question semblent avoir attire a eux les particules pyroxeniques en suspension dans le feldspath et les avoir incorporees a leur masse." It is q...


Imprint: Rarebooksclub.com
Country of origin: United States
Release date: March 2012
First published: March 2012
Authors: Department of Geology
Dimensions: 246 x 189 x 4mm (L x W x T)
Format: Paperback - Trade
Pages: 82
ISBN-13: 978-1-130-89089-1
Categories: Books
LSN: 1-130-89089-9
Barcode: 9781130890891

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