Geology topics
Joyce A. Ober
Publications and source records attributed to Joyce A. Ober.
Mineral resource of the month: lithium
Lithium, the lightest metallic element, is silvery, white and soft, and highly reactive. It is used most frequently in chemical compounds or traded as mineral concentrates. Its thermal properties make it an ideal component in thermal shock-resistant ceramics, and its electrochemical properties make it an ideal material for several types of batteries.
Mineral resource of the month: sulfur
Since domestic sulfur production peaked at nearly 11 million metric tons in 1974, the sulfur industry has undergone dramatic change. In 1974, mined sulfur produced using the Frasch hot water method provided 8 million tons of sulfur, representing 75 percent of total elemental sulfur production. (In the Frasch process, hot water is injected directly into the sulfur-containing mineral strata, melting the crystalline sulfur, which then lifts to the surface with air.) The remaining 25 percent was produced as byproduct sulfur.
Materials flow of sulfur
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Fertilizers: Sustaining Global Food Supplies
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