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A variety of gold deposits are formed in accretionary orogens, including orogenic gold deposits. [38] Orogenic gold deposits are typically located in metamorphosed fore-arc and back-arc regions, as well as in the arc [3] and show a close spatial relationship to lamprophyres and associated felsic porphyry dikes and sills. [39]
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 ...
Appalachian Mountains are a well-studied orogenic belt resulting from a late Paleozoic collision between North America and Africa. Taconic orogeny – Mountain-building period that affected most of New England; Acadian orogeny – North American orogeny; Alleghanian orogeny – Mountain-forming event that formed the Appalachian and Allegheny ...
Gold Ore Vein Located in Good Enough Silver Mine in Tombstone, Arizona. In gold vein deposits the ore shoots tend to be deposited in an elongated plunging direction. The majority of the time the ore shoot plunge for orogenic gold deposits arises from the mineral deposition and direction of the fluid flow controlled by structures. [4]
Hatu is the name of a gold deposit and associated gold mines in the West Junggar region [1] [2] in Tuoli County [3] within the Xinjiang province of China. [4] It is the largest gold deposit in West Junggar and occurs in the Central Asian Orogenic Belt. [5] It is located less than one hour by road from Karamay. [4]
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]
The early Carboniferous intrusive related gold deposits originate from a series of porphyries of granite, quartz-syenite, and tonalite. The ore from the intrusion deposited within the brittle ductile shear zone by magmatic fluids. The area of gold deposition from the intrusive body is small but the gold centration is significant. [1] [7] [5]
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