Full Download Geology and Ore Deposits of the Elkhorn Mining District, Jefferson County, Montana - Joseph Barrell file in PDF
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Ore deposit types ore deposits can be classified on the basis of: - • composition of the deposit (contained elements). • form of the deposit (size, shape, orientation and ore mineral distribution). • associated host rocks or geological structures (ore associations). • interpreted genesis of the deposit (processes, controls).
The ore deposit known as the elkhorn mine was located as the holter lode on january 2, 1875, and was worked nearly continuously from that time until november, 1899. The general history of the property has already been mentioned in giving that of the elkhorn mining district district.
Mineral deposits, and so the present report deals chiefly with the mines and prospects of the area. The general geology was con sidered for its relation to the ore deposits, but the details of the complex stratigraphy and the correlation of some sultan basin formations with those in other areas are phases of the geology.
Elkhorn mountains south of the helena valley, folded and faulted cretaceous sedimentary rocks, along with granite of the boulder batholith, are covered up by green-grey andesites and lesser white rhyolites (the volcanic equivalents of granite) of the elkhorn mountains.
Geology and ore deposits of the elkhorn mining district, jefferson county item preview.
The digital edition of all books may be viewed on our website before purchase. Excerpt from geology and ore deposits of the elkhorn mining district, jefferson county, montana (classic reprint)about the publisherforgotten books publishes hundreds of thousands of rare and classic books.
Geology and mineral deposits, east flank of the elkhorn mountains, broadwater county, montana / by: klepper, montis ruhl, 1915- published: (1971) strippable coal in custer and powder river counties, montana / by: brown, andrew, 1896- published: (1954).
Uranium ore deposits are economically recoverable concentrations of uranium within the earth's crust.
Most of the deposits are in either sedimentary rocks or the andesite, or at the contact zone with the quartz monzonite (roby 1960; weed 1901). The area around the town of elkhorn is highly tilted limestone and quartzites that have been injected with gabbro and diorite and later granite.
In places includes layers of fluvial conglomerate and, in parts of the deschutes-umatilla plateau, extensive deposits of fanglomerate composed mostly of miocene basalt debris and silt.
Montana, usa ref: geology and ore deposits of the elkhorn mining district, jefferson county, montana; walter.
The ore deposit known as the elkhorn mine was located as the holter lode on january 2, 1875, and was worked nearly continuously from that time until november, 1899. The general history of the property has already been mentioned in giving that of the elkhorn mining district district.
Where these deposits were eroded, gold particles formed placer deposits in river gravel. Miners worked both lode and placer mining claims beginning in 1862. Districts in the elkhorn mountains produced the most lode and placer gold of the entire region, more than mines in either the wallowa or the greenhorn mountains.
Geological survey in cooperation 3 coal mines in the elkhorn area of mcdowell county, west virginia, which the mineral composition of bedrock in the study area to aid interpretation of geochem.
Köp geology and ore deposits of the elkhorn mining district, jefferson county, montana av joseph barrell, walter harvey weed på bokus.
The baisley-elkhorn mine was closed at the time of data entry with no known plans to re-open. The ore mined is composed of sphalerite, pyrite and galena with waste material consisting primarily of sericite, calcite and quartz. The ore body extends 548 meters (1,800 feet) long and 3 meters (10 feet) wide.
Geology and ore deposits of the elkhorn mining district, jefferson county, montana part 2 of united states.
A series of mills evolved at elkhorn to handle the increasingly complex ores. 1901 geology and ore deposits of the elkhorn mining district, jefferson county,.
7 jan 2019 photographer: rod benson summary author: rod benson the elkhorn mountains south of helena, montana are remnants of volcanoes that.
The elkhorn mining district has the largest number of mines and the greatest variety of types of deposits. In the tizer basin several narrow goldbearing veins cut andesitic volcanic rocks, and in the southern part of the area sporadic small veins and replacement deposits occur in carbonate rocks.
Introduction association exists at elkhorn, where several gold-rich skarns and breccia pipes.
Geology and mineral resources of estonia: start page main text references figures photos tables.
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Volume highlights include: presentation of the latest research on a range of ore deposit types application of ore deposits to multiple areas of geology and geophysical exploration emphasis on diverse methods and tools for the study of ore deposits useful case studies for geologists in both academia and industry ore deposits: origin, exploration.
Figure 1—the elkhorn mine is in the elkhorn creek drainage south of wise river maps in the montana bureau of mines and geology mineral property files.
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