Metamorphic Crystallization

Metamorphic Crystallization investigates the upper regions of the crystalline Earth, where countless solid-state chemical changes have taken place during the long history of the planet.

Metamorphic Crystallization

Author: Ralph Kretz

Publisher: Wiley-Blackwell

ISBN:

Page: 507

View: 755

Metamorphic Crystallization investigates the upper regions of the crystalline Earth, where countless solid-state chemical changes have taken place during the long history of the planet. The exploration proceeds in five stages. Firstly, a brief reminder of the importance of field, microscopic, and experimental phase-equilibrium results in metamorphic studies is given, followed by a review of classical thermodynamics as applied to minerals. Different kinds of mineral equilibria are defined, and representative natural and experimental examples of each kind are examined. The kinetics of reactions involving crystals (reaction rate, diffusion, nucleation, crystal growth), referring to certain experiments that have provided information on these microprocesses, are reviewed. Finally, the granular microstructure of natural samples (crystal shape, size, spatial distribution) together with chemical data are examined, and an interpretation of these observations in terms of mineral kinetics is pursued. This exploration intends to leave the reader more appreciative of changes which occur within the Earth, and more interested in the application of thermodynamics and kinetics in the study of these changes.

U S Geological Survey Professional Paper

thus , its Early Cretaceous crystallization was magmatic , not metamorphic .
Although the sample must have an Early Cretaceous age of 100 to 120 Ma , the
U - Pb systematics of these younger spot analyses are highly complex , and an ...

U S  Geological Survey Professional Paper

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Page: 204

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U S Geological Survey Bulletin

The metamorphism appears to have continued after the F2 folding stopped , as
indicated in the inner zones of some contact aureoles , where metamorphic
crystallization has tended to obscure the F2 structures . The Tertiary plutons
appear to ...

U S  Geological Survey Bulletin

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Geological Survey Bulletin

... of intense folding recognized in the unmetamorphosed pre - Tertiary strata are
correlated with similar events in the metamorphic Gambier Bay Formation , where
they were more intense and are accompanied by metamorphic crystallization .

Geological Survey Bulletin

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Petroleum Geology of China

6.6.1.1 Reservoir pore spaces It is generally recognized that metamorphic rocks
are devoid of primary porosity . Metamorphic crystallization can create a certain
amount of fractures between the grains of the rock ; in those parts of the rock ...

Petroleum Geology of China

Author: Guangming Zhai

Publisher:

ISBN:

Page: 650

View: 295

"Petroleum Geology of China is a series about the practice and experience of exploration in China. It contains petroleum geological data and knowledge from all the main oil and gas basins and area favourable for exploration both onshore and offshore. It is the first series to publish systematically this type of works covering the history and results of China's petroleum exploration since the found of the People's Republic of China, and it will show the great achievements of the oil and gas exploration of our country."--Preface in Chinese language volumes.

Metamorphic Tectonites of the Himalaya

Thus, the three metamorphic phases can be called as the Khul...bu, Sarung and
Phaplu thrust phases. The mineralogical occurrences in the tectonic units are
shown in Figure 25. Approximate relationship of metamorphic crystallization and
 ...

Metamorphic Tectonites of the Himalaya

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Page: 370

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Contributed research papers.

Igneous and Metamorphic Petrology

Moreover , metamorphic crystallization , especially post - tectonic or nontectonic
crystallization , tends to reduce intergranular cavities and to heal ruptures to the
point where pore fluids might be virtually excluded . Relatively rapid reaction ...

Igneous and Metamorphic Petrology

Author: Francis J. Turner

Publisher:

ISBN:

Page: 602

View: 735

Definition and classification of different kinds of rocks are essential in furnishing a language by which petrological concepts may be conveyed and observational data concerning rocks may be intelligibly recorded.However,there is no general agreement as to the most satisfactory basis of classification or as to the extent to which precision of definition is desirable and practicable.

Principles of Geochemistry

Geologists have studied the products of completed reactions , namely the mineral
associations of metamorphic rocks ... been reached in each case ) the different
mineral associations can only represent different conditions of crystallization .

Principles of Geochemistry

Author: Brian Harold Mason

Publisher: John Wiley & Sons

ISBN:

Page: 344

View: 707

Southeastern Geology

Textural evidence suggests that significant amount of metamorphic crystallization
was post - tectonic . For example , the abundance of randomly oriented tremolite
and talc laths indicates that much of the amphibole and talc formed after the ...

Southeastern Geology

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View: 899

The American Mineralogist

suggesting that twinning of plagioclase is more frequent in rocks of moderate to
high metamorphic grade than in albite ... may reflect generally prevalent
differences in the physical conditions of magmatic and metamorphic
crystallization .

The American Mineralogist

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View: 866

Vols. 34-40 (1949-55) include Contributions to Canadian mineralogy, v. 5, pts. 1-7.

Furthermore , no reasonable doubt can remain that frequently the attainment of
the threshold temperature may post - date the time of magmatic or metamorphic
crystallization by many millions of years . The existence of this important time -
lag ...

Author: 董申保

Publisher:

ISBN:

Page: 381

View: 587

北京大学资源集团出版基金资助出版

South African Journal of Geology

When imaged in CL, single zircons from this garnettkyanite+opx granulite display
complex nested, multifaceted, broadly-zoned internal structure which is likely
recording metamorphic crystallization. Diffuse dark zones at the center of some ...

South African Journal of Geology

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View: 966