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An orogenic gold deposit is a type of hydrothermal mineral deposit. More than 75% of the gold recovered by humans through history belongs to the class of orogenic gold deposits. [1] Rock structure is the primary control of orogenic gold mineralization at all scales, as it controls both the transport and deposition processes of the mineralized ...
The majority of primary gold deposits fall into two main categories: lode gold deposits or intrusion-related deposits. Lode gold deposits, also referred to as orogenic gold are generally high-grade, thin, vein and fault hosted. They are primarily made up of quartz veins also known as lodes or reefs, which contain either native gold or gold ...
Orogeny (/ ɒˈrɒdʒəni /) is a mountain - building process that takes place at a convergent plate margin when plate motion compresses the margin. An orogenic belt or orogen develops as the compressed plate crumples and is uplifted to form one or more mountain ranges.
Classification. 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.
The Laoshankou Iron Oxide-Cu-Au deposit, which is located at the southwest of the Qinhe City, Xinjian, Northwest China, is considered as one of the most important high-quality copper and gold reserve in the Central Asian Orogenic Belt, with the deposit being hosted by the volcanic rocks formed during Middle Devonian. [30]
Mauritanide Orogeny – Ancient orogen parallel to the west coast of Africa from Morocco to Guinea-Bissau. Mozambique Orogeny – Band in the Earth's crust from East Antarctica through East Africa up to the Arabian-Nubian Shield. Zambezian Orogeny – Area of mountain building now in southern Zambia and northern Zimbabwe.
Carlin–type gold deposits are sediment -hosted disseminated gold deposits. These deposits are characterized by invisible (typically microscopic and/or dissolved) gold in arsenic rich pyrite and arsenopyrite. [2] This dissolved kind of gold is called "invisible gold", as it can only be found through chemical analysis. [3]
The North China Craton covers an area of around 1.7x10 6 km 2 in northeastern China, Inner Mongolia, the Yellow Sea, and North Korea. Edited from Kusky, 2007 [1] and Zhao et al., 2005 [2] The location of the North China Craton in Asia. The North China Craton is a continental crustal block with one of Earth's most complete and complex records of ...