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Iron oxide copper gold (IOCG) deposits are considered to be metasomatic expressions of large crustal-scale alteration events driven by intrusive activity. The deposit type was first recognised by discovery and study of the supergiant Olympic Dam copper-gold-uranium deposit (Olympic Dam mine), and South American examples.
Lynch Quarry Site, North Dakota, NRHP-listed and a U.S. National Historic Landmark, a flint quarry that was "a major source of flint found at archaeological sites across North America, and it has been estimated that the material was mined there from 11,000 B.C. to A.D. 1600."
Polymetallic or sulfide deposits form in active oceanic tectonic settings such as island arcs and back-arcs and mid ocean ridge environments. [29] These deposits are associated with hydrothermal activity and hydrothermal vents at sea depths mostly between 1 and 4 km (0.62 and 2.5 mi). These minerals are rich in copper, gold, lead, silver and ...
The Rhine [note 2] (/ r aɪ n / RYNE) [3] is one of the major European rivers.The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps.It forms part of the Swiss-Liechtenstein border, then part of the Swiss-Austrian border.
General properties; Accelerator type: Synchrotron: Beam type: proton, heavy ion: Target type: collider: Beam properties; Maximum energy: 6.8 TeV per beam (13.6 TeV ...
Berlin (/ b ɜːr ˈ l ɪ n / bur-LIN; German: [bɛɐ̯ˈliːn] ⓘ) [10] is the capital and largest city of Germany, by both area and population. [11] With over 3.85 million inhabitants, [12] it has the highest population within its city limits of any city in the European Union.
KPMG office in Amstelveen, Netherlands KPMG offices at FPM41, Lisbon, Portugal. In 1816, Robert Fletcher started working as an accountant and in 1839 the firm he worked for changed its name to Robert Fletcher & Co. [8] William Barclay Peat joined the firm in 1870 at 17 and became head of the firm in 1891, renamed William Barclay Peat & Co. by then. [9]
Trinidad and Tobago, [a] officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean.Comprising the main islands of Trinidad and Tobago, along with numerous smaller islands, it is located 11 kilometres (6 nautical miles) northeast off the coast of Venezuela, 130 kilometres (70 nautical miles) south of Grenada, and west of Barbados.