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The Mother Lode coincides with the suture line of a terrane, the Smartville Block. [4] The zone contains hundreds of mines and prospects, including some of the best-known historic mines of the gold-rush era. Individual gold deposits within the Mother Lode are gold-bearing quartz veins up to 15 metres (49 ft) thick and a few thousand feet long ...
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The Gold Country (also known as Mother Lode Country) is a historic region in the northern portion of the U.S. state of California, that is primarily on the western slope of the Sierra Nevada. It is famed for the mineral deposits and gold mines that attracted waves of immigrants, known as the 49ers , during the 1849 California Gold Rush .
High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz-gold vein in California's Mother Lode. Specimen is 3.2 cm (1.3 in) wide. Various theories of ore genesis explain how the various types of mineral deposits form within Earth's crust. Ore-genesis theories vary depending on the mineral or commodity examined.
The gold of the Mother Lode is in quartz veins within phyllite, schist, slate, and greenstone. Through 1959, the Mother Lode produced about 13.3 million troy ounces (414 tonnes) of gold. [17] The second-largest gold-mining district in California was Grass Valley-Nevada City district in Nevada County.
Where two rivers, creeks, or streams divided, prospectors would each and follow the richer one in their search for the source of the gold also known as the mother lode. A quartz vein outcropping containing gold was discovered by prospectors in 1862 which led to a series of mining claims that resulted in the formation of a mining district called ...
The Kennedy Gold Mine is a gold mine in Jackson, California, one of the deepest mines on the Mother Lode. It closed in 1942 and together with nearby Argonaut Mine , is registered as California Historical Landmark No. 786. [ 1 ]
Exploration of orogenic gold began after the year 1840 when the source of nearby placer gold deposits was being investigated, after which large scale mining operations began in the 1990s. [45] The Mother Lode Homestake is located in South Dakota, USA, and is a historic mine which was host to orogenic gold held within a banded iron formation ...