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The Carlin Unconformity or Carlin Trend is a geologic feature in northeastern Nevada which represents a period of erosion or non-deposition likely associated with a collision between a tectonic crustal block called a terrane and the North American Plate. The collision occurred during the
Newmont's reserve history on the Carlin Trend, 1965 - 2001
by Dean G. Heitt, Newmont Mining Corporation * {{coord missing, Nevada Unconformities Carboniferous events Carboniferous geology of Nevada Gold mining in Nevada
The Carlin Unconformity or Carlin Trend is a geologic feature in northeastern Nevada which represents a period of erosion or non-deposition likely associated with a collision between a tectonic crustal block called a terrane and the North American Plate. The collision occurred during the Mississippian
Mississippian may refer to:
* Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago
*Mississippian culture, a culture of Native American mound-builders from 900 to 1500 AD ...
Period, about 350 million years before present. The collision is associated with the Antler Orogeny.
The collision induced higher crustal temperatures and pressures which produced numerous hot springs along the suture zone. Several episodes of subsurface magmatism are known to have occurred subsequent to the collision, associated with tectonic forces affecting the entire Basin and Range Province. During each of these episodes, and particularly during the Eocene epoch, hot springs brought dissolved minerals toward the surface, precipitating them out along fissures. Among these minerals were gold and silver.
The Carlin Gold trend is one of the world's richest gold mining districts. It is a belt of gold deposits, primarily in Paleozoic limy sediments, that is about wide and long, extending in a north-northwest direction through the town of Carlin, Nevada. Gold was first discovered in the area in the 1870s, but there was little production until 1909, and only about 22,000 ounces was produced through 1964. By 2008, mines in the Carlin Trend had produced over 70 million ounces of gold, worth around $85 billion at 2010 prices.
See also
* Carlin–type gold deposit * Gold mining in Nevada * John Livermore *Ralph J. Roberts
Ralph Joel Roberts (March 13, 1920June 18, 2015) was an American businessman who was the founder of Comcast, serving as its CEO for 46 years. In 2011 he served as founder and chairman emeritus of Comcast's board of directors until his death.
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References
Further reading
* * *Newmont's reserve history on the Carlin Trend, 1965 - 2001
by Dean G. Heitt, Newmont Mining Corporation * {{coord missing, Nevada Unconformities Carboniferous events Carboniferous geology of Nevada Gold mining in Nevada