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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 ...
Lapis lazuli is found in limestone in the Kokcha River valley of Badakhshan province in north-eastern Afghanistan, where the Sar-i Sang mine deposits have been worked for more than 6,000 years. [20] Afghanistan was the source of lapis for the ancient Persian, Egyptian and Mesopotamian civilizations, as well as the later Greeks and Romans.
In the royal cemetery lapis lazuli is found as jewelry, plaques and amulets, and as inlays in gaming boards, musical instruments, and ostrich-egg vessels as well as parts of larger sculptural groups such as the "Ram in a Thicket" and as the beard of a bull attached to a lyre. Some of the larger objects include a spouted cup, a dagger-hilt, and ...
The Guanajuato Mining District, Mexico: This district has been mined for centuries and is known for its high-grade epithermal veins containing gold and silver. [11] The Baguio Mineral District, Philippines: This district is home to numerous epithermal vein deposits, including the Acupan Mine, one of the largest gold mines in the Philippines. [12]
The Shortugai site was discovered in 1976 and, since then, excavators were able to find carnelian and lapis lazuli beads, bronze objects, terracotta figurines. [7] Other typical finds of the Indus Valley Civilization include one seal with a short inscription [8] and a rhinoceros motif, [7] clay models of cattle with carts [9] and painted pottery. [10]
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It was Canada's longest lived continuous mining operation and produced metals worth over $20 billion in terms of 2005 metal prices. Grading was in excess of 5% Pb and 6% Zn. The ore genesis of the Sullivan ore body is summarized by the following process: Sediments were deposited in an extensional second-order sedimentary basin during extension.