Results 351 to 360 of about 318,456 (400)
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, 1965
Semiquantitative mineral analysis has been done by X-ray diffraction on the < 2 μ- and 2–20 μ-size fractions of approximately five hundred Recent deep-sea core samples from the Atlantic, Antarctic, western Indian Oceans, and adjacent seas.
P. Biscaye
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Semiquantitative mineral analysis has been done by X-ray diffraction on the < 2 μ- and 2–20 μ-size fractions of approximately five hundred Recent deep-sea core samples from the Atlantic, Antarctic, western Indian Oceans, and adjacent seas.
P. Biscaye
semanticscholar +1 more source
Environmental Mineralogy. Radiation Mineralogy
1998Mining and smelting have been the cause of major pollution problems since the earliest days of these activities. However, significant increases in waste production occurred in the Middle Ages, when metallic mining industries in north and central Europe became capable of extracting ore from greater and greater depths.
H. FöRster +15 more
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What is a Kimberlite? Petrology and Mineralogy of Hypabyssal Kimberlites
, 2019Hypabyssal kimberlites are subvolcanic intrusive rocks crystallised from mantle-derived magmas poor in SiO2 and rich in CO2 and H2O. They are complex, hybrid rocks containing significant amounts of mantle-derived fragments, primarily olivine with rare ...
R. Mitchell, A. Giuliani, H. O’Brien
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An Introduction to Soil Mineralogy
SSSA Book Series, 2018make up about 50% of the volume of most soils. They provide physical support for plants, and create the water- and air-filled pores that make plant growth possible.
D. Schulze
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2011
The term asbestos collectively refers to a group of naturally occurring fibrous minerals which have been exploited in numerous commercial and industrial settings and applications dating to antiquity. Its myriad uses as a "miracle mineral" owe to its remarkable properties of extreme resistance to thermal and chemical breakdown, tensile strength, and ...
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The term asbestos collectively refers to a group of naturally occurring fibrous minerals which have been exploited in numerous commercial and industrial settings and applications dating to antiquity. Its myriad uses as a "miracle mineral" owe to its remarkable properties of extreme resistance to thermal and chemical breakdown, tensile strength, and ...
openaire +3 more sources
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1977
Since the fiftieth anniversary of the Mineralogical Society in 1926, there has been an epoch of great progress, resulting from the impact of applied physics and from the generally widened horizons of Earth science. Description of the morphology of crystals by means of the goniometer, determination of the optics of minerals in transmitted light and of ...
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Since the fiftieth anniversary of the Mineralogical Society in 1926, there has been an epoch of great progress, resulting from the impact of applied physics and from the generally widened horizons of Earth science. Description of the morphology of crystals by means of the goniometer, determination of the optics of minerals in transmitted light and of ...
openaire +3 more sources
, 2008
We summarize progress with respect to (1) different approaches to isolate, extract, and quantify organo-mineral compounds from soils, (2) types of mineral surfaces and associated interactions, (3) the distribution and function of soil biota at organo ...
I. Kögel‐Knabner +7 more
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We summarize progress with respect to (1) different approaches to isolate, extract, and quantify organo-mineral compounds from soils, (2) types of mineral surfaces and associated interactions, (3) the distribution and function of soil biota at organo ...
I. Kögel‐Knabner +7 more
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Geochimica et Cosmochimica Acta, 1975
The minerals of chromium are tabulated together with sources of data on their crystal structures and on new or recent occurrences. Cr(3+) ions in octahedral coordination with oxygen and tetrahedral doubly negatively charged Cr(VI)O4 ions predominate in minerals on earth, whereas lunar minerals contain Cr(2+) and Cr(3+) ions.
Virginia Mee Burns, Roger G. Burns
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The minerals of chromium are tabulated together with sources of data on their crystal structures and on new or recent occurrences. Cr(3+) ions in octahedral coordination with oxygen and tetrahedral doubly negatively charged Cr(VI)O4 ions predominate in minerals on earth, whereas lunar minerals contain Cr(2+) and Cr(3+) ions.
Virginia Mee Burns, Roger G. Burns
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, 2005
Banded iron-formations (BIFs) occur in the Precambrian geologic record over a wide time span. Beginning at 3.8 Ga (Isua, West Greenland), they are part of Archean cratons and range in age from about 3.5 until 2.5 Ga.
C. Klein
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Banded iron-formations (BIFs) occur in the Precambrian geologic record over a wide time span. Beginning at 3.8 Ga (Isua, West Greenland), they are part of Archean cratons and range in age from about 3.5 until 2.5 Ga.
C. Klein
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