Ilmenite, magnetite, hematite, and copper in lavas of the Keweenawan series
Henry Rowland Cornwall
1951, Economic Geology (46) 51-67
The opaque minerals in ten lava flows of the Keweenawan series of Michigan were studied microscopically by the writer. The basaltic lavas, which range in thickness from 100 to 1,400 feet, contain ilmenite, magnetite, hematite, intergrowths of magnetite-ilmenite and ilmenite-hematite, copper sulfides, native copper, and pyrite. Variations of opaque iron minerals with thickness of flow are slight, but native copper predominates in the thinner flows and copper sulfides in the thickest. Pyrite occurs only in the thickest flow....
Petrology and habit of some diabase sheets in southeastern Pennsylvania
Preston Enslow Holtz
1949, Open-File Report 49-33
Small masses of granophyre occur in the upper part of diabase intrusions southeastern Pennsylvania. Diamond drill hole exploration of magnetite deposits near Dillsburg revealed a body of diabase beneath the sedimentary rocks in which the deposits occur. The drill core revealed a complete gradational sequence downward from a diabase chill...
Determination of lithium in rocks by distillation
M. H. Fletcher
1949, Analytical Chemistry (21) 173-175
A method for the quantitative extraction and recovery of lithium from rocks is based on a high temperature volatilization procedure. The sample is sintered with a calcium carbonate-calcium chloride mixture at 1200° C. for 30 minutes in a platinum ignition tube, and the volatilization product is collected in a plug...
General geology and ground-water resources of the island of Maui, Hawaii
Harold T. Stearns, Gordon Andrew Macdonald
1942, Bulletin 7
Maui, the second largest island in the Hawaiian group, is 48 miles long, 26 miles wide, and covers 728 square miles. The principal town is Wailuku. Sugar cane and pineapples are the principal crops. Water is used chiefly for irrigating cane. The purpose of the investigation was to study the...
Means of recognizing source beds
P.D. Trask, H.W. Patnode
1936, Conference Paper
Eight characteristics of sediments are considered as possible means of recognizing source beds: 1, quantity of organic matter in the sediments; 2, reducing power, which is a measure of ability of the sediments to reduce chromic acid; 3, color of sediments; 4, volatility of sediments; 5, degree of volatility, which...
The Rôle of volatiles in the formation of Virginia titanium deposits
C. S. Ross
1934, Eos, Transactions, American Geophysical Union (15) 245-245
The feldspathic rock with which the titanium deposits of Virginia are associated appears to be an anorthosite, although the plagioclase is somewhat more sodic than in normal anorthosites. That is, this rock shows evidence of having been introduced as a mush‐like mass of crystals and intersititial magma, and of undergoing...
A new equilibrator: A device for the determination of the distribution ratio of a volatile solute between two miscible solvents
G. Jones, B. B. Kaplan
1928, Journal of the American Chemical Society (50) 1600-1603
No abstract available....
The nature of the volatile matter of coal as evolved under different conditions
H. C. Porter
1908, Journal of the American Chemical Society (30) 1486-1507
No abstract available....
Some experiments on the determination of volatile combustible matter in coals and lignites
E.E. Somermeier
1906, Journal of the American Chemical Society (28) 1002-1013
[No abstract available]...
