from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Formed or situated below the earth's surface. Used of rocks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Formed underground, (often by ascending solutions).
from the GNU version of the Collaborative International Dictionary of English
- adj. Formed or crystallized at depths beneath the earth's surface; -- said of granite, gneiss, and other rocks, whose crystallization is believed of have taken place beneath a great thickness of overlying rocks. Opposed to
from The Century Dictionary and Cyclopedia
- Produced or formed under or below (the earth's surface); netherformed; specifically, in geology, said of rocks which have assumed their present form and structure beneath the surface; Plutonic: a term applied more especially to the granitic rocks: opposed to epigene.
Sorry, no etymologies found.
The underlying sulfide portion of the deposit, known as the hypogene project, is currently in the commissioning phase.
That this is a hypogene rock, sometimes in contact with granite as well as with trap, is evident at
Following the late 2010 completion of scoping work on the development of the hypogene resource that underlies the supergene deposit currently being mined at Quebrada Blanca, a full feasibility study commenced in early 2011.
As contemplated by the results of the scoping study, production from the hypogene would be expected to be approximately 200,000 tonnes per year of copper in concentrate plus approximately 5,100 tonnes per year of molybdenum in concentrate.
As planned, copper cathode production of 2,700 tonnes in the fourth quarter was 31% lower than a year ago as the mine is transitioning from the supergene deposit to the primary hypogene deposit.
Major development expenditures included $26 million for preparatory stripping for Highland Valley Copper's mine life extension project, $26 million for Antamina's expansion, $18 million at the Quebrada Blanca hypogene project and $68 million at our coal operations.
Following the completion of scoping work in late 2010 on the development of the hypogene resource that underlies the supergene deposit currently being mined at Quebrada Blanca, a full feasibility study commenced in early 2011.
That this is a hypogene rock, sometimes in contact with granite as well as with trap, is evident at Oxley's Table Land, and other places.
The rocks which I have termed endogenous are characteristically distinguished by Lyell, in his 'Principles of Geology', 1833, vol. iii., p. 374, as "nether-formed" or "hypogene rocks."
Lyell, Charles, investigations on the numerical relations of extinct and organic life, 274, 275; nether-formed or hypogene rocks, 249; uniformity of the production of erupted rocks, 257.