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Trondhjemites, Dacites, and Related Rocks
Developments in Petrology, 6: Trondhjemites, Dacites, and Related Rocks focuses on the geology, geochemistry, and petrology of several kinds of trondhjemites, dacites, and genetically related rocks. The selection first elaborates on the definition, environment, and hypotheses of origin of trondhjemite; a review of the mineralogy and chemistry of tertiary-recent dacitic, latitic, rhyolitic, and related salic volcanic rocks; and some trace elements in trondhjemites and their implications to magma genesis and paleotectonic setting. Discussions focus on tectonic environments and trace element patterns, selection and reliability of trace elements, interrelationships between mineralogy and chemist...
Bibliography of North American Geology
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
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Trace Metal Geochemistry of Sediments, Northeast Pacific Ocean
It was the purpose of this study to undertake a reconnaissance examination of sediments in the vicinity of the northern Juan de Fuca and Explorer ridges, active spreading ridges in the northeast Pacific, in order to determine the nature and extent of any metalliferous sediments in this area of relatively high pelagic and hemipelagic sedimentation.
