Download or read book Mineralogy and Petrology of the Rocklin Pluton Placer and Sacramento Counties California written by Samuel Edward Swanson and published by . This book was released on 1970 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology Mineralogy and Geochemistry of the Lower Coon Mountain Pluton Northern California with Respect of the Distribution of Platinum group Elements written by Norman J. Page and published by . This book was released on 1993 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shallow level Plutonic Complexes in the Eastern Sierra Nevada California and Their Tectonic Implications written by Richard A. Schweickert and published by Geological Society of America. This book was released on 1976 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology of the Castle Crags Pluton Shasta and Siskiyou Counties California written by Walter R. Vennum and published by . This book was released on 1971 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology Mineralogy and Geochemistry of the Lower Coon Mountain Pluton Northern California with Respect of the Distribution of Platinum group Elements written by Norman J. Page and published by . This book was released on 1993 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology and Geochemistry of the Russian Peak Pluton Klamath Mountains Northern California written by Spencer Jerome Cotkin and published by . This book was released on 1987 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology of the Lakeview Mountain Pluton and Adjacent Area Riverside County California written by Douglas M. Morton and published by . This book was released on 1966 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology and Geochemistry of the Yuba Rivers Pluton Northwestern Sierra Nevada Foothills California written by Carol Ann Eddy and published by . This book was released on 1986 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology Structure and Contact Relations of Part of the Yuba Rivers Pluton Northwestern Sierra Nevada Foothills California written by John Bailey Bobbitt and published by . This book was released on 1982 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology of the Boundary Peak Adamellite Pluton written by Dahl Le Roy Harris and published by . This book was released on 1967 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Geochemistry and Petrology of the Morgan Creek Pluton Inyo County California written by Edward Joseph Cray and published by . This book was released on 1981 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrology of the Lakeview Mountains Pluton and Adjacent Area Riverside County California written by Douglas M. Morton and published by . This book was released on 1966 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mineralogy Petrology Geochemistry and Petrogenesis of the Mount Poser Gabroic Pluton Southern California written by Cary Franklin Richard Wheeler and published by . This book was released on 1979 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mineralogy Geochemistry and Geochronology of the La Posta Pluton San Diego and Imperial Counties California written by John Patrick Clinkenbeard and published by . This book was released on 1987 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The La Posta pluton is the largest of a series of similar bodies that characterize the eastern zone of the Peninsular Ranges batholith. It appears to be a single intrusive body that is concentrically zoned from a metaluminous, sphene-hornblende-biotite tonalite rim to a peraluminous, muscovite-biotite granodiorite core. The interior portion of the pluton contains a large NNW oriented metasedimentary roof pendant which divides the pluton in the study area. Cutting both the La Posta pluton and the metasedimentary rocks is a body of garnet-muscovite-biotite monzogranite which is enveloped by sillimanite-grade metamorphic rocks. This study of the geochemical, mineralogical, and isotopic variations of the pluton and some of the related rocks was undertaken in order to better understand the age and origin of this large zoned body. Variation in major element compositions from rim to core is small with silica ranging from 66% to 74% and A/CNK ratio varying from 0.96 to 1.21. Total iron, MgO, CaO, MnO, Ti02, and P205 all decrease in abundance from rim to core. K20 and Na20 show no systematic variation in the pluton. The geochemical variations within the pluton are consistent with the petrographic relationships which indicate that hornblende, then biotite, and finally muscovite crystallized in the presence of quartz, increasingly sodic plagioclase, and an increasing amount of alkali feldspar. The La Posta rocks are enriched in Sr relative to other rocks in the Peninsular Ranges batholith. The garnet-bearing monzogranites appear to be geochemically distinct from the La Posta rocks. Mineral compositions show a limited range of variation within the pluton. The anorthite content of plagioclase varies approximately 10% from the margin to the core of the pluton. Biotite compositions vary primarily with paragenesis. Estimates of temperature and pressure conditions based on mineral chemistries indicate pressures of 2 to 3 kbars and temperatures of 735°C to 785°C. These conditions are consistent with those obtained for the adjacent metamorphic rocks. Three U-Pb (zircon) ages and one Rb-Sr age for rocks from the La Posta pluton indicate an age of 94 -+ 1 m.y. No significant variation in age was noted between the eastern and western portions of the pluton. The La Posta pluton is isotopically zoned with respect to oxygen. Whole rock oxygen values increase from 10.5 per mil at the western margin to 11.8 per mil at the core and decrease to 9.7 per mil at the eastern margin. This zonation appears to be primary rather than reflecting the effects of high level processes. The high primary oxygen values are indicative of the involvement of crustal material in the origin of the magma either as a source material or as a reservoir for isotopic exchange. The overall chemical composition of the pluton and the low initial strontium value of 0.70437 suggests that any continentally derived component was small. The La Posta pluton appears to have been emplaced as a single intrusive unit at mid-crustal depths of 7 to 11 kilometers. The compositional and isotopic evidence indicate that the major components of the magma originated from the upper mantle or intermediate mantle derived materials. The zonation from metaluminous sphene-hornblende-biotite tonalite at the margins to muscovite-biotite granodiorite resulted from the fractional crystallization of the magma as the pluton cooled from the margins inward.

Download or read book Geology and Petrology of the Hughes Creek California Pluton written by Ali Sepehri and published by . This book was released on 1984 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Minerals of California Classic Reprint written by Arthur S. Eakle and published by Forgotten Books. This book was released on 2017-10-12 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Minerals of California Since the appearance of the second list, our knowledge of the geology and mineralogy of the State has vastly increased. The ore deposits of many of the counties, the gem and borate deposits of the southern counties, and the petrography of many districts, have been investigated and described, so that our present knowledge of the mineralogy of the State is much more general. The present list contains more than double the number of definite mineral species given by Hanks, besides many sub-species and varieties. The desire has been to make the list as complete as possible of the known minerals, and where they occur, but the list of localities where the same mineral might be found is necessarily incomplete. Many minerals are so commonly distributed throughout the State, such as small bodies or pockets of metallic minerals and the rock-forming minerals, that it would be useless and impossible to cite all of their occurrences. In such a vast area as California, localities may be known to local col lectors where excellent specimens may occur, unknown to the author. Some minerals may be known to occur in the State which have not been mentioned in this work, but it is believed that they will be very few in number. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Download or read book Petrology of a Porton of the Pat Keyes Pluton Inyo County California written by George Charles Dunne and published by . This book was released on 1970 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: