Hafnium Isotopes and Trace Elements as Geochemical Tracers in Zircon from Tonalite Intrusions from Adamello, Northern Italy PDF Download
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Author: Jason Duff
Publisher:
ISBN:
Category : Hafnium
Languages : en
Pages : 222
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Book Description
Author: Jason Duff
Publisher:
ISBN:
Category : Hafnium
Languages : en
Pages : 222
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Book Description
Author: Charles Ryan Jeffcoat
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Callie Sendek
Publisher:
ISBN:
Category : Hafnium
Languages : en
Pages : 165
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Book Description
The Late Cretaceous Mount Givens pluton, located in the central Sierra Nevada batholith, is noteworthy for its large size (~1400 km2) and relative compositional and textural homogeneity. The pluton is characterized by a 30 km wide, ellipse-shaped northern lobe (ca. 98-91 Ma) that connects with a long mass (ca. 95-91 Ma) about 15 km wide and extends 50 km SE. Zircon trace elements and d18O and eHf from a sample suite representative of the observable petrologic diversity of the pluton document significant heterogeneities. All zircons have high Ti-in-zircon model temperatures (850-1000 °C), pronounced negative Eu anomalies, and concave down MREE and HREE patterns, indicating initial melts were undersaturated in zircon and that zircon growth occurred during ascent or emplacement of Mount Givens magmas. Zircon trace elements record appreciable variation, and suggest that crystal transfer was ongoing throughout pluton growth. Significant variations in O and Hf isotopes require mixing of multiple, isotopically distinct sources. Longitudinal variation in both systems suggests increasing mantle contributions in the eastern portion of the pluton. A clear decrease in isotopic variability at all scales in post-95 Ma samples indicates that later magmas were more thoroughly mixed prior to emplacement. This increase in zircon isotopic homogeneity paired with the narrow timespan of intrusion hints that the inner portion of the northern lobe may have existed as a large melt reservoir.
Author: John M. Hanchar
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509322
Category : Science
Languages : en
Pages : 520
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Book Description
Volume 53 of Reviews in Mineralogy and Geochemistry covers the most important aspects of zircon-related research over the past twenty-years and highlight possible future research avenues. The chapters review the structure of zircon and other mineral (and synthetic) phases with the zircon structure; the minor and trace element compositions of igneous, metamorphic and hydrothermal zircons; the study of melt inclusions in zircon; experimental and natural studies of zircon saturation and the use of zircon saturation thermometry for natural rocks; cation diffusion and oxygen diffusion in zircon; the historical development of zircon geochronology from the mid-1950s to the present; ID-TIMS, SIMS and ICP-MS; the application of zircon chronology in constraining sediment provenance and the calibration ofthe geologic time-scale; other isotopic systematics; the spectroscopy of zircon, both crystalline and metamict and an atlas of internal textures of zircon.
Author: John Beaver Mertie
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 34
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Book Description
A report on the zircon resources of Florida and other areas in the Coastal Plain province with a discussion of the origin of this mineral.
Author: C. L. Waring
Publisher:
ISBN:
Category : Zircon
Languages : en
Pages : 34
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Book Description
Author:
Publisher:
ISBN:
Category : Hafnium
Languages : en
Pages : 14
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Book Description
Author: Anil K. Mukherji
Publisher: Elsevier
ISBN: 1483184307
Category : Science
Languages : en
Pages : 296
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Book Description
Analytical Chemistry of Zirconium and Hafnium compiles literature on the characterization and analysis of zirconium and hafnium. Various methods in studying the properties of the featured elements are presented in this book. This book also discusses the aqueous solutions of zirconium and hafnium. It then explains the methods such as dissolution of ores and alloys, detection and identification, and gravimetric determinations. This text further examines the titrimetric, electrometric, and absorptiometric methods, as well as methods of separations using ion-exchange and using solvent extraction, along with separation of hafnium from zirconium. The latter part of this text presents methods such as spectrographic analyses, X-ray analyses, and neutron activation analysis and separation of tracers. This book will come in handy for chemists and chemistry students, as well as for others interested in studying zirconium and hafnium.
Author: Michael Fleischer
Publisher:
ISBN:
Category : Hafnium ores
Languages : en
Pages : 44
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Book Description
Author: Clark M. Johnson
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509365
Category : Science
Languages : en
Pages : 472
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Book Description
The goal for Volume 55 of Reviews in Mineralogy and Geochemistry was to bring together a summary of the isotope geochemistry of non-traditional stable isotope systems as is known through 2003 for those elements that have been studied in some detail, and which have a variety of geochemical properties. In addition, recognizing that many of these elements are of interest to workers who are outside the traditional stable isotope fields, we felt it was important to include discussions on the broad isotopic variations that occur in the solar system, theoretical approaches to calculating isotopic fractionations, and the variety of analytical methods that are in use. We hope, therefore, that this volume proves to be useful to not only the isotope specialist, but to others who are interested in the contributions that these non-traditional stable isotopes may make toward understanding geochemical and biological cycles. The review chapters in this volume were the basis for a two-day short course on nontraditional stable isotopes held prior (May 15-16, 2004) to the spring AGU/CGU Meeting in Montreal, Canada.
