- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A massive block of cast iron placed beneath the anvils of steam and other heavy hammers to absorb vibration. It is often embedded in masonry or concrete.
Industry:Mining
A massive dense buff to pink rock typically rich in grossular garnet and calcic pyroxene, and enveloped in serpentinite. Epidote, vesuvianite, and other calcium-rich minerals are commonly present. It is formed by metasomatic alteration of a protolith that, in many cases, was a dike rock, as shown by preservation of structures. The name was applied by Bell in 1911.
Industry:Mining
A massive form of iron sulfide (marcasite and sometimes also pyrite and pyrrhotite) having a dull liver-brown color.
Industry:Mining
A massive or earthy, apple-green, nickel-bearing phyllosilicate; probably willemseite or kerolite having disordered stacking; (Ni,Mg)<sub>6</sub>Si<sub>8</sub>O<sub>20</sub>(OH)<sub>4</sub>.
Industry:Mining
A massive topographic and structural feature, esp. in an orogenic belt, commonly formed of rocks more rigid than those of its surroundings. These rocks may be protruding bodies of basement rocks or younger plutonic bodies. Examples are the crystalline massifs of the Helvetic Alps, whose rocks were deformed mainly during the Hercynian orogeny, long before the Alpine orogeny.
Industry:Mining
A massive variety of apatite found in Estramadura, Spain. A phosphate ore.
Industry:Mining
A massive variety of boracite found in Germany. It resembles a fine-grained white marble; sometimes has a subcolumnar structure.
Industry:Mining
A massive, amorphous, dark-brown metamorphic hydrocarbon ranging from soft and elastic to hard and brittle; melts in a candle flame without decrepitation; conchoidal fracture.
Industry:Mining
A massive, amorphous, dark-brown metamorphic hydrocarbon ranging from soft and elastic to hard and brittle; melts in a candle flame without decrepitation; conchoidal fracture.
Industry:Mining
A massive, amorphous, dark-brown metamorphic hydrocarbon ranging from soft and elastic to hard and brittle; melts in a candle flame without decrepitation; conchoidal fracture.
Industry:Mining
