2 edition of quantitative mineralogical and chemical classification of igneous rocks found in the catalog.
quantitative mineralogical and chemical classification of igneous rocks
Edwin Thomas Hodge
Bibliography: p. 200.
|Statement||by Edwin T. Hodge.|
|Series||University of Oregon publication. Geology series. v. 1, no. 2, March 1927|
|The Physical Object|
|Pagination||2 p., 133-200 p. :|
|Number of Pages||200|
In this article, the manner in which igneous rocks occur in nature is introduced, followed by a discussion of the general textural features and appearance of these rocks. The classification and nomenclature of igneous rocks are treated in the final section. Igneous rocks are formed when magma cools, either on Earth’s surface or beneath it,File Size: KB. The MINLITH program provides for calculating the first approximation mineral composition of sedimentary rocks and their metamorphic counterparts from the bulk chemical compositions. The method is universal and can be applied to most types of clastic, pelitic, and carbonate sedimentary rocks based on a limited set of minerals and their simplified by: 7.
parent-child relationships for terms in the classification system for composite-genesis rocks. The domain of this classification system includes composite-genesis rocks, defined as rocks that are the product of more than one rock-forming process. They are not purely igneous or Size: 3MB. Alkaline rocks are worldwide observed as hosts for rare metal (Zr-REE-Nb) minerals. The classification of the ore bearing rock type is challenging due to the fact that textures and mineral assemblage are obscured by post-magmatic alteration. In addition, the alteration causes fine and intricate intergrowth of the ore minerals with associated gangue. Hence, intensive comminution is necessary to Cited by: 1.
Present day igneous petrology requires three systems of rock classification: (1) a quantitative mineralogical and/or chemical system that is suitable for systematic petrography, (2) a genetic system that is designed for use in petrogenetic discussions, and (3) a flexible system of petrography that can be employed in mapping igneous rocks in limited areas of particular by: 4. C. Color Index (CI) is a quantitative feature of phaneritic igneous rocks that expresses the rock’s mineral composition in terms of the volume percentage of dark minerals found in the rock. Color index is used exclusively for classifying only intrusive igneous rocks (see page 81 in lab book)File Size: 37KB.
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A Quantitative Mineralogical and Chemical Classification of Igneous Rocks [Edwin Thomas Hodge] on *FREE* shipping on qualifying offers. University Of Oregon Publication, Geology Series, V1, No. 2, March, Additional Physical Format: Online version: Hodge, Edwin T. (Edwin Thomas), b. Quantitative mineralogical and chemical classification of igneous rocks.
Get this from a library. Chemical composition of igneous rocks expressed by means of diagrams, with reference to rock classification on a quantitative chemico-mineralogical basis. [Joseph Paxson Iddings].
Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and s rock is formed through the cooling and solidification of magma or magma can be derived from partial melts of existing rocks in either a planet's mantle or lly, the melting is caused by one or more of.
Chemical classification of igneous rocks. Igneous rocks can be classified according to chemical or mineralogical parameters: Chemical: total alkali-silica content (TAS diagram) for volcanic rock classification used when modal or mineralogic data is unavailable. The IUGS systematics of igneous rocks If the mineral mode cannot be determined as is often the case for volcanic rocks, then a chemical classification of total alkalis versus silica (TAS) is.
Mineral Lamination Development in Layered Gabbros of the British Palaeogene Igneous Province: A Combined Anisotropy of Magnetic Susceptibility, Quantitative Textural and Mineral Chemistry Study.
Journal of Petrology, Vol. 49, Issue. 6, p. Cited by: Igneous rock - Igneous rock - Mineralogical components: The major mineralogical components of igneous rocks can be divided into two groups: felsic (from feldspar and silica) and mafic (from magnesium and ferrous iron).
The felsic minerals include quartz, tridymite, cristobalite, feldspars (plagioclase and alkali feldspar), feldspathoids (nepheline and leucite), muscovite, and corundum. Twelve of the more recent proposals for the classification of igneous rocks are dis- sis-others attempt to combine chemical with mineralogical and textural data; but twelve of the twenty are purely or predominantly mineralogical and to a greater or less extent quantitative.
The au-thors of these twelve schemes are: J. Iddings (, Decades of field and microscope studies, and more recent quantitative geochemical analyses have resulted in a vast, and sometimes overwhelming, array of nomenclature and terminology associated with igneous rocks.
This book presents a complete classification of igneous rocks based on all the recommendations of the International Union of 5/5(1). PDF Download Origin Of Igneous Rocks Full Books - PDFBooks - origin of igneous rocks Fri, 01 May + Search you book title to read online book for free or download book PDF for free.
Quantitative classification of igneous rocks, based on chemical and mineral characters, with a systematic nomenclature Quantitative classification of igneous rocks, based on chemical and mineral characters, with a systematic nomenclature Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Pages: After several failed attempts to construct a new chemico-mineralogical igneous rock classification on the basis of three or more factors, C.
Whitman Cross, Joseph P. Iddings, Louis V. Pirsson, and Cited by: 3. Classification of Igneous Rocks As has already been described, igneous rocks are classified into four categories, based on either their chemistry or their mineral composition: felsic, intermediate, mafic, and ultramafic.
The diagram in Figure can be used to help classify igneous rocks by their mineral : Steven Earle. Classification of igneous rocks is one of the most confusing aspects of geology. This is partly due to historical reasons, partly due to the nature of magmas, and partly due to the various criteria that could potentially be used to classify rocks.
Early in the days of geology there. Full text of "Quantitative classification of igneous rocks, based on chemical and mineral characters, with a systematic nomenclature".
Decades of field and microscope studies, and more recent quantitative geochemical analyses have resulted in a vast, and sometimes overwhelming, array of nomenclature and terminology associated with igneous rocks.
This book presents a complete classification of igneous rocks based on all the recommendations of the International Union of Geological Sciences (IUGS) Subcommission on. Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth s rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary.
Igneous rocks are formed from the solidification of magma, which is a hot ( to 1, °C, or 1, to 2, °F) molten or partially molten rock material. BAS, M. LE Report of the Working Party on the classification of the lunar igneous rocks.
Meteoritics & Planetary Science, Vol. 36, Issue. 9, p. the least common igneous rocks take up the longest chapter of the book. The ninth chapter (pages –, 16% of the text) is devoted to the alkali rocks, which make up.
Classification of Igneous Rocks When we talk about the chemical composition of a rock we usually speak in terms of the oxides, e.g., Typical basaltTypical granite SiO 2 50% 70% Al 2O 3 15% 12% FeO+MgO 15% 3% CaO 8% 2% K 2O+Na 2O 5% 8% Composition of melts affects behavior while still fluid • More SiO 2 will increase viscosity, – making.
That goal – of studying igneous rocks to learn about process – will come up again and again in this book, because understand- ing what goes on in magmatic systems is the modern petrologist’s principal aim in life.
Igneous Rocks and Processes: A Practical Guide, 1st edition. By Robin Gill. Published by Blackwell Publishing Starting with a classification that had been handed to me ex cathedra, I was not greatly concerned at first as to its construction and was occupied with problems of mineral identification; the composition, texture, and variability of igneous rocks; the existence of series; .