Deposit Types
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- Category: Molybdenum knowledge
- Published on 22 July 2014
- Written by ling
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Not only the size of a large molybdenum deposit, and many types. Has proven deposits including porphyry, porphyry - skarn types, skarn, vein type, deposition type.
Porphyry molybdenum deposit such deposit known as veinlets disseminated molybdenum deposit, was produced in-house stockwork porphyry and granite rock in the vicinity. The main mineralization molybdenum mineralization significantly later than the rock, that rock is generally used as host rocks exist in the main mineralization. Host rock deposits can be rock, such as Jilin Montenegro molybdenite mineralization is mainly hosted in Yanshan plagiogranite body, some deposit host rocks can be both rock, but also in the vicinity of the rock, such as Shaanxi Jinduicheng molybdenum, molybdenum porphyry mineralization developed in the Yanshan and outer contact zone of biotite and hornblende in the rock of spilite; there's deposits, which host rock blasting angle can be conglomerate tube, such as Beijing Dake village molybdenum.
(1) porphyry - skarn granitoid intrusions molybdenum deposit formation process, due to the different nature of the rock, to produce different thermal contact metamorphism and metasomatism exposure, the results are developed aluminum silicate hornfels of rock, carbonate rock development of the skarn. Ore-forming hydrothermal fluids ensuing events lead mineralization superimposed granitoid rocks, based on the hornfels and skarn rock. Henan Luanchuan typical Shangfanggou, three Zhuang deposits.
Porphyry and porphyry - skarn molybdenum plays an important role in our country, these two types of deposit accounts for 71% of the total reserves of the country's total reserves of molybdenum.
(2) skarn type molybdenum deposit such deposits are mainly produced in the contact zone of granite rock and carbonate rocks, as well as the outer layer developed along the contact zone. The main sulphide mineralization is generally later than the formation of skarn, molybdenum skarn mineralization can generate a certain contact, and in time for the main mineralization as host rocks exist. Outsider's Eve skarn deposits, often developed a series of hydrothermal alteration. Ore varied shapes. Liaoning Jinxi Yangjiazhangzi as molybdenum, skarn ore bodies located within the majority. Romer Yechangping Henan, Hebei Laiyuan Grand Bay, also belong to this type. This class of subordinated deposit in its reserves account for 24% of total reserves.
(3) vein-type molybdenum deposit which is produced by the body in a variety of geological fissure veins containing molybdenite orebody consists of deposits. Next to the veins often developmental cable type alteration, veins containing veins can be a wide body with a pulse can also be composed of fine ore veins, vein side altered rocks often form disseminated ores. The main gangue mineral veins varied, the most common are quartz veins, with minor pegmatite veins or quartz veins and sulfates, etc. Such deposit meaningful, only 2.2% of the proved reserves. Typical deposit are: Qingtian Shiping Sichuan, Jiangxi Province Yuda Long Hill, Henan Song County yellow water Um.
(4) molybdenum deposit their sedimentary rocks of different geological nature of the outputs can be divided into sandstone type and black (sulfur quality, asphaltene) Shale-type categories. Such deposit meaningful, representing only 0.68% of proven reserves.
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