Author: Jarrod A. BrownPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Mineralogy and Geochemistry of Alkali Feldspars from the Tanco Pegmatite, Southeastern Manitoba
Author: Jarrod A. BrownMineralogy and Geochemistry of Alkali Feldspars from the Tanco Pegmatite, Southeastern Manitoba
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The alkali feldspar paragenetic sequence in the Tanco pegmatite at Bernic Lake, Manitoba, spans the entire crystallization and cooling history of the pegmatite, and includes six different K(Rb)-feldspar and six different albite varieties. Total feldspar modal abundances approach 50% for the entire pegmatite volume. Blocky K-feldspar, aplitic albite and cleavelandite together account for more than 95% of total feldspar volumes. The other, late, low-temperature feldspars include (Rb, K) or (K) adularia and albite in veins and cavities, mostly contained in inner zones associated with pollucite and petalite. Feldspars collected from each of the nine major zones of the pegmatite have been assessed in terms of composition and structural state, along one east-west transect and two north-south transects. The large and economically significant Tanco pegmatite represents an extreme in terms of petrologic processes involving fractional and disequilibrium crystallization from granitic melts enriched in volatiles and fluxing components (H2O, B, F, P), rare-alkalis (Li, Rb, Cs) a d HFSE (Ta, Nb, Zr, Hf). (Abstract shortened by UMI.).
Petrology and Mineralization of the Tanco Rare-element Pegmatite, Southeastern Manitoba
Author: P. ČernýMineralogy and Petrology of the Tanco Rare-element Pegmatite Deposit Southeastern Manitoba
Author: P. ČernýThe Mineralogy and Geochemistry of the Lower Tanco Pegmatite, Bernic Lake, Manitoba, Canada
Author: K. J. FerreiraBeryllium
Author: Edward S. GrewPublisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501508849
Category : Science
Languages : en
Pages : 704
Book Description
Volume 50 of Reviews in Mineralogy and Geochemistry treats Beryllium and its cosmogenic isotopes. This volume includes an overview of Be studies in the earth sciences and a systematic classification of Be minerals based on their crystal structure. It treats the analysis of these minerals by the secondary ion mass spectroscopy as well as experimental studies of systems involving Be. Moreover, this volume reviews the behavior of Be in the Solar System, with an emphasis on meteorites, the Moon and Mars, and the implications of this behavior for the evolution of the solar system. It gives an overview of the terrestrial geochemistry of Be and discusses the contamination of the environment by this anthropogenic toxin. It reports use of the longer lived Be-10 to assess erosion rates and other surficial processes and how this isotope can yield independent temporal records of geomagnetic field variations for comparison with records obtained by measuring natural remnant magnetization, be a chemical tracer for processes in convergent margins, and can date events in Cenozoic tectonics. It reviews applications of the shorter lived isotope Be-7 in environmental studies as well. Residual phases include acidic plutonic and volcanic rocks, whose geochemistry and evolution are covered, while granitic pegmatites, which are well-known for their remarkable, if localized, Be enrichments and a wide variety of Be mineral assemblages, are reviewed. Not all Be concentrations have obvious magmatic affinities; for example, one class of emerald deposits results from Be being introduced by heated brines. Pelitic rocks are an important reservoir of Be in the Earth's crust and their metamorphism plays a critical role in recycling of Be in subduction zones, eventually, anatectic processes complete the cycle, providing a source of Be for granitic rocks.
Rare-element Geochemistry and Mineral Deposits
Author: Geological Association of CanadaPublisher: St. John's, N.L. : Geological Association of Canada
ISBN:
Category : Science
Languages : en
Pages : 360
Book Description
Feldspars and their Reactions
Author: Ian ParsonsPublisher: Springer Science & Business Media
ISBN: 9401111065
Category : Science
Languages : en
Pages : 672
Book Description
Feldspar minerals make up 60% of the crust of the Earth. They are stable in the upper mantle, and are so abundant in the crust that they form the basis of the classification of igneous rocks. At the surface, feldspars weather to form clay minerals which are the most important mineral constituent of soils. The articles in this book review the chemical reactions of feldspars over the whole sweep of pressure and temperature regimes in the outer Earth, and describe the fundamental aspects of crystal structure which underlie their properties. The book covers intracrystalline reactions, such as order-disorder transformations and exsolution, and transfer of stable and radiogenic isotopes, which can be interpreted to provide insights into the thermal history of rocks. It is suitable for final year undergraduates or research workers.
Feldspars and their Reactions
Author: Ian ParsonsPublisher: Springer Science & Business Media
ISBN: 9780792327226
Category : Science
Languages : en
Pages : 702
Book Description
Feldspar minerals make up 60% of the crust of the Earth. They are stable in the upper mantle, and are so abundant in the crust that they form the basis of the classification of igneous rocks. At the surface, feldspars weather to form clay minerals which are the most important mineral constituent of soils. The articles in this book review the chemical reactions of feldspars over the whole sweep of pressure and temperature regimes in the outer Earth, and describe the fundamental aspects of crystal structure which underlie their properties. The book covers intracrystalline reactions, such as order-disorder transformations and exsolution, and transfer of stable and radiogenic isotopes, which can be interpreted to provide insights into the thermal history of rocks. It is suitable for final year undergraduates or research workers.
The Third Hutton Symposium on the Origin of Granites and Related Rocks
Author: M. BrownPublisher: Geological Society of America
ISBN: 0813723159
Category : Science
Languages : en
Pages : 352
Book Description