Microtextures of Igneous and Metamorphic Rocks

Microtextures of Igneous and Metamorphic Rocks

The idea that original microtextures are erasedby timeis thus difficult tosupport
and quite conjectural. Erasing ... Thus the longerand more complicated
thethermal, tectonothermal ortectonic history of an igneous or metamorphic rock,
the more ...

Author: J.P. Bard

Publisher: Springer Science & Business Media

ISBN: 9789400946408

Category: Science

Page: 264

View: 405

At a time when 'textural' evidence is regarded as being 'obvious' ( . . . ) it becomes more and more difficult to find illustrations or even descriptions of the arrangements of the various constituents of 'traumatized' rocks. It is helpful in consequence to advise geology students that the study of thin sections is not only concerned with the identification of their mineral content. To do so would mean they could not see the wood for the trees. Accurate identification of the indi vidual minerals that form rocks is fundamental in their description but the analysis of their textures and habits is also essential. Study of textural features enforces constraints upon the inter pretation of the origin and history of a rock. The analysis of micro textures cannot and should never be an aim in itself, out must be sup ported by qualitative and quantitative correlations with theories of petrogenesis. The aim here is to help the reader to bridge the gap between his observations of rocks unqer the microscope and petrogenetic theories. The habits or architectures of crystals in rocks may resemble those studied by metallurgists and glass scientists. Analysis of micro textures is undergoing change engendered by comparisonS between manu factured and hence minerals. This can be seen from the increased number of publications dealing with crystal ~rowth or deformation processes at microscopic scales to which the name of 'nanotectonics' has been applied.
Categories: Science

Handbook of Crystal Growth

Handbook of Crystal Growth

Introduction to metamorphic textures and microstructures. Kluwer Academic
Publishers; 1990. ISBN 10:0216926858/0-216-92685-8. Bard JP. Microtextures
of igneous and metamorphic rocks. Series: petrology and structural geology, IX.

Author: Peter Rudolph

Publisher: Elsevier

ISBN: 9780444633064

Category: Science

Page: 1418

View: 749

Vol 2A: Basic Technologies Handbook of Crystal Growth, 2nd Edition Volume IIA (Basic Technologies) presents basic growth technologies and modern crystal cutting methods. Particularly, the methodical fundamentals and development of technology in the field of bulk crystallization on both industrial and research scales are explored. After an introductory chapter on the formation of minerals, ruling historically the basic crystal formation parameters, advanced basic technologies from melt, solution, and vapour being applied for research and production of the today most important materials, like silicon, semiconductor compounds and oxides are presented in detail. The interdisciplinary and general importance of crystal growth for human live are illustrated. Vol 2B: Growth Mechanisms and Dynamics Handbook of Crystal Growth, 2nd Edition Volume IIB (Growth Mechanisms and Dynamics) deals with characteristic mechanisms and dynamics accompanying each bulk crystal growth method discussed in Volume IIA. Before the atoms or molecules pass over from a position in the fluid medium (gas, melt or solution) to their place in the crystalline face they must be transported in the fluid over macroscopic distances by diffusion, buoyancy-driven convection, surface-tension-driven convection, and forced convection (rotation, acceleration, vibration, magnetic mixing). Further, the heat of fusion and the part carried by the species on their way to the crystal by conductive and convective transport must be dissipated in the solid phase by well-organized thermal conduction and radiation to maintain a stable propagating interface. Additionally, segregation and capillary phenomena play a decisional role for chemical composition and crystal shaping, respectively. Today, the increase of high-quality crystal yield, its size enlargement and reproducibility are imperative conditions to match the strong economy. Volume 2A Presents the status and future of Czochralski and float zone growth of dislocation-free silicon Examines directional solidification of silicon ingots for photovoltaics, vertical gradient freeze of GaAs, CdTe for HF electronics and IR imaging as well as antiferromagnetic compounds and super alloys for turbine blades Focuses on growth of dielectric and conducting oxide crystals for lasers and non-linear optics Topics on hydrothermal, flux and vapour phase growth of III-nitrides, silicon carbide and diamond are explored Volume 2B Explores capillarity control of the crystal shape at the growth from the melt Highlights modeling of heat and mass transport dynamics Discusses control of convective melt processes by magnetic fields and vibration measures Includes imperative information on the segregation phenomenon and validation of compositional homogeneity Examines crystal defect generation mechanisms and their controllability Illustrates proper automation modes for ensuring constant crystal growth process Exhibits fundamentals of solution growth, gel growth of protein crystals, growth of superconductor materials and mass crystallization for food and pharmaceutical industries
Categories: Science

Atlas of Igneous and Metamorphic Rocks Minerals Textures

Atlas of Igneous and Metamorphic Rocks  Minerals    Textures

Photographs and brief descriptions of various types of rocks, minerals, and microtextures.

Author:

Publisher:

ISBN: OCLC:39139564

Category: Igneous rocks

Page:

View: 154

Photographs and brief descriptions of various types of rocks, minerals, and microtextures.
Categories: Igneous rocks

Hydrogeology of Crystalline Rocks

Hydrogeology of Crystalline Rocks

Alkali feldspars provide an easily read microtextural record of fluid– rock
interaction in the range from 450°C to diagenetic ... domain textures in Orthoclase
, both of which form at higher temperatures in cooling igneous and metamorphic
rocks.

Author: I. Stober

Publisher: Springer Science & Business Media

ISBN: 9789401718165

Category: Science

Page: 278

View: 426

Hydrogeology of Crystalline Rocks deals with deep groundwater in the granite and gneiss basement of the continents. It has become evident during the past years that highly mineralized water is present in an interconnected fracture network of the basement. Thus, the upper part of the crust of the continents can be viewed as an aquifer and investigated with tools common in hydrogeology. This book presents accounts on water-conducting features of crystalline rocks and summarizes the hydraulic properties of the basement. The volume includes reviews, new data and research on the often remarkable chemical composition of deep groundwater. Microbial processes in the deep basement aquifer are probably more important than previously thought. Two contributions focus on this recent extension of research of the biosphere to greater depth in the Earth. This book represents the first multidisciplinary and integrated account of deep groundwater hydrology in crystalline basement. It is of interest to hydrologists and hydrogeologists working with water in crystalline rocks, but also to solid earth geophysicists, geochemists and petrologists with an interest in fluids in the crust. Scientists involved in nuclear waste disposal programs and geothermal energy development will find a wealth of stimulating ideas in this volume.
Categories: Science

A Practical Guide to Rock Microstructure

A Practical Guide to Rock Microstructure

Numerical simulation of the development of metamorphic and deformation
microstructures is also well under way (Jessell, ... The term 'microtexture', which
unfortunately is starting to enter the literature, is a tautology, because texture'
refers to the ... 1.9 Traditional rock groupings Many rock-forming processes apply
to more than one of the traditional igneous, sedimentary and metamorphic rock
groups.

Author: Ron H. Vernon

Publisher: Cambridge University Press

ISBN: 0521891337

Category: Science

Page: 594

View: 294

Rock microstructures provide clues for the interpretation of rock history. A good understanding of the physical or structural relationships of minerals and rocks is essential for making the most of more detailed chemical and isotopic analyses of minerals. Ron Vernon discusses the basic processes responsible for the wide variety of microstructures in igneous, sedimentary, metamorphic and deformed rocks, using high-quality colour illustrations. He discusses potential complications of interpretation, emphasizing pitfalls, and focussing on the latest techniques and approaches. Opaque minerals (sulphides and oxides) are referred to where appropriate. The comprehensive list of relevant references will be useful for advanced students wishing to delve more deeply into problems of rock microstructure. Senior undergraduate and graduate students of mineralogy, petrology and structural geology will find this book essential reading, and it will also be of interest to students of materials science.
Categories: Science

19th Forum on the Geology of Industrial Minerals

19th Forum on the Geology of Industrial Minerals

3 2 SANDY CARBONATES & SANDSTONE 1 3 2 SLAG 11 2 IGNEOUS &
METAMORPHIC GRAVEL GRANITE , DIORITE NUMBER OF SOURCES . ...
Initial microtexture is determined by the fracture characteristics of the rock when
crushed .

Author: S. E. Yundt

Publisher:

ISBN: CHI:23028006

Category: Geology

Page: 216

View: 373

Categories: Geology

Miscellaneous Paper Ontario Geological Survey

Miscellaneous Paper   Ontario Geological Survey

... resulted in decreased abrasion resistance as measured by AAV. 4. Hard
igneous or metamorphic rocks, such as basalt, gabbro, gneiss and granite. Initial
microtexture is determined by the fracture characteristics of the rock when
crushed.

Author:

Publisher:

ISBN: MINN:31951P00234570M

Category: Mines and mineral resources

Page:

View: 569

Categories: Mines and mineral resources

Formation Evaluation

Formation Evaluation

5.44 Phyllitic: Further metamorphism of slaty rocks results in an increase in grain
size and lineation. Commonly the ... Characteristic mineral assemblages and
relationships (Figure 5-8 and paragraph 5.41) also allow the rock to be
distinguished from an igneous rock. 5.47 Rock Name Classification of
metamorphic rocks requires a combination of mineralogy, macroand microtexture
. The occurrence of ...

Author: EXLOG/Whittaker

Publisher: Springer Science & Business Media

ISBN: 9789400953536

Category: Science

Page: 183

View: 277

Petroleum Geology is a complex discipline, drawing upon data from many technologies. It is the function of Well site Geologists to integrate processed data produced prior to and dur ing the drilling operation With their own geological observations. For this reason, it is necessary that geologists appreciate some of the technology, theory of measurement, and processing of this data in order to better assess and use them. In the Field Geologists's Training Guide (Exlog, 1985) and Mud Logging: Principles and Interpretations (Exlog, 1985), an introduction is given to the scope of petroleum geology, and the techniques of hydrocarbon (oil and gas) logging as a reservoir evaluation tool. This handbook is intended to provide the Logging Geologist, and those training for a Consultant Wellsite Geologist position, with a review of geological techniques and classification systems. This will ensure the maximum development of communicable geological informa tion. Whether a geologist's work lies in this direction or in the more applied field of pressure evaluation, it is the application of geological insight to engineering problems that distinguishes the professional logging geologist in the field. This book will be of interest to and become a regular reference for all geologists. 1 INTRODUCTION CUTTINGS RECOVERY 1. 1 In an ideal borehole and mud system, cuttings would be transported to surface with the same order and composition as they were cut, as in Figure 1-1.
Categories: Science

Orogenesis

Orogenesis

Crustal protoliths, such as sediments, volcanics, intrusive igneous rocks and pre-
existing metamorphic rocks, will ... on individual rocks – including the mineralogy
and mineral chemistry, microtextures, age and isotopic information – as well as ...

Author: Michael R. W. Johnson

Publisher: Cambridge University Press

ISBN: 9780521765565

Category: Science

Page: 388

View: 858

A valuable introduction to the processes of mountain belt formation and summary of orogenic research, for advanced students and researchers.
Categories: Science