Results 21 to 30 of about 514,411 (305)

Chemical composition of gahnite and degree of pegmatitic fractionation in the Borborema Pegmatitic Province, northeastern Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2007
Gahnite electron probe microanalyses from three pegmatites (Mirador, Capoeira and Quintos) of the Borborema Pegmatitic Province in northeastern Brazil allowed to determine molar compositions ranging from 86.22 to 95.41 mol% gahnite (ZnAl2O4), 1.51 to 6 ...
Dwight R. Soares   +3 more
doaj   +1 more source

dragon: A New Tool for Exploring Redox Evolution Preserved in the Mineral Record

open access: yesFrontiers in Earth Science, 2020
The flow of energy and elements between the geosphere and biosphere can be traced through changing redox chemistry of Earth’s surface. Deep-time trends in the mineral record, including mineral age and elemental composition, reveal a dynamic history of ...
Stephanie J. Spielman, Eli K. Moore
doaj   +1 more source

A Strategy for Teaching an Effective Undergraduate Mineralogy Course [PDF]

open access: yes, 2004
An effective undergraduate mineralogy course provides students with a familiarity and understanding of minerals that is necessary for studying the Earth.
R. Swope, Reto Gieré
core   +1 more source

Ti-Fe mineralization in Bafq anomaly no. 15, Central Iran: Insights to mineralogy and mineral chemistry [PDF]

open access: yesپترولوژی, 2021
The Ti- Fe mineralization in Bafq 15 anomaly located 35 Km NW of Bafq city, and is a part of Poshte Badam Block in the Central Iran. Mineralization including magnetite, titanomagnetite, ilmenite, and minor pyrite which hosted by gabbro and pyroxenite ...
Sakine Amraei   +4 more
doaj   +1 more source

Soil bacterial communities of a calcium-supplemented and a reference watershed at the Hubbard Brook Experimental Forest (HBEF), New Hampshire, USA [PDF]

open access: yes, 2011
Soil Ca depletion because of acidic deposition-related soil chemistry changes has led to the decline of forest productivity and carbon sequestration in the northeastern USA. In 1999, acidic watershed (WS) 1 at the Hubbard Brook Experimental Forest (HBEF),
Brodie, Eoin L.   +6 more
core   +2 more sources

A review of mineral carbonation technologies to sequester CO2 [PDF]

open access: yes, 2014
Carbon dioxide (CO2) capture and sequestration includes a portfolio of technologies that can potentially sequester billions of tonnes of CO2 per year.
A. Sanna   +214 more
core   +1 more source

Mineral chemistry and thermobarometry of gabbroic rocks from the Pargeh area (NE Qazvin): A key for understanding the crystallization conditions [PDF]

open access: yesپترولوژی
Introduction Mineral chemistry data as well as petrography provide a comprehensive picture of magma crystallization conditions that support the conclusions based on geochemical data. In addition, the chemical composition of minerals such as clinopyroxene,
Nahid Naseri   +4 more
doaj   +1 more source

The Mineral Chemistry Networks of Tin and Tungsten Reflect Metallogenic Events of the Mesozoic

open access: yesGeosciences
Continental remobilization is a crucial driver of metallogenesis and the formation of ore deposits. Some of the world’s largest mineral deposits of the economically valuable elements tin (Sn), tungsten (W), gold (Au), copper (Cu), lead (Pb), and zinc (Zn)
Eli K. Moore   +2 more
doaj   +1 more source

Palladinized graphene oxide-MOF induced coupling of Volmer and Heyrovsky mechanisms, for the amplification of the electrocatalytic efficiency of hydrogen evolution reaction

open access: yesScientific Reports, 2021
In this study, a nanocomposite of palladium supported graphene oxide (GO)/metal–organic framework (MOF) was prepared using electroless deposition of Pd on GO followed by impregnation method of Pd@GO and MOF. The prepared materials were characterized with
Mogwasha D. Makhafola   +6 more
doaj   +1 more source

Review of trace toxic elements (Pb, Cd, Hg, As, Sb, Bi, Se, Te) and their deportment in gold processing. Part 1: Mineralogy, aqueous chemistry and toxicity [PDF]

open access: yes, 2011
A literature review on the deportment of trace toxic elements (Pb, Cd, Hg, As, Sb, Bi, Se, and Te) in gold processing by cyanidation is presented which compiles the current knowledge in this area and highlights the gaps.
Breuer, P.L.   +4 more
core   +2 more sources

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