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: ...over a blast lamp, and from the total loss deducting the C02 already determined and correcting for the gain of oxygen by the FeO. From Analysis IV. the amount of serpentine in the rock can be readily calculated. A typical serpentine 1 has the composition of Si02 MgO H20 48-48 43 48 13-04, the water being-fy of the ...
Read More
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: ...over a blast lamp, and from the total loss deducting the C02 already determined and correcting for the gain of oxygen by the FeO. From Analysis IV. the amount of serpentine in the rock can be readily calculated. A typical serpentine 1 has the composition of Si02 MgO H20 48-48 43 48 13-04, the water being-fy of the whole. In the Kimberley rock freed from calcite the water is only-/ of the whole, so that we may conclude that about half of the rock is serpentine. The analysis shows that olivine forms tbe principal constituent of the remaining portion of the rock. The slight excess of silica beyond that required to form olivine,2 (S 18-16 ufo)' belngS t0 thG bitite' brnzite and garnet present in small proportions. The calcite, forming 16 per cent, of the rock, is probably, with most of the serpentine, the result of the decomposition of the ground-mass. Unless we assume that the lime is derived from without, which would be difficult to explain,3 it has come from the decomposition of certain lime-bearing minerals. With the exception of chrome-diopside--which is present only in small quantity--the porphyritic crystals are practically free from lime. It may have come from diopside, melilite, or some other lime-bearing mineral in the ground-mass. The small percentage of alumina and the mineral associations exclude felspar as a constituent.4 Calcite frequently occurs in serpentine, and is generally regarded as the result of the decomposition of a pyroxenic mineral.5 1 Rammelsberg, Zeits. Deutsch. Oeol. Gesell. xxi. 1869, p. 97; Mineral. Chemie, Leipzig, Theil ii. 1875, p. 506. 2 Stelzner, 'Ueber den Olivin des Melilithbasaltes vom Hochboh, ' Neues Jahrb. i. 1884, p. 271. 3 Surely not; because, where volcanic action has been, springs with CaC03 are common.--T. G. B. 4 ..
Read Less
Add this copy of Papers and Notes on the Genesis and Matrix of the to cart. $54.95, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Palala Press.
