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地质矿业
 geological and mining industry
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Fethiye ophiolite in which the studied chromite property is found is one of the allochthonous units which are known as Lycian nappes. Lycian nappes are several thrust sheets comprising Mesozoic-Early Tertiary platform, slope and basinal successions that are dominated by sedimentary rocks with subordinate amounts of extrusive igneous rocks. These thrust sheets are reconstructed as a passive continental margin that faced northwards into the northern branch of the Mesozoic Tethys, known as the Northern Neotethyan Ocean. The Lycian melange tectonically overlies the Lycian thrust sheets and is interpretated as an accretionary prism related to the subduction of Mesozoic Tethyan.

本文研究的铬铁矿产地所在的费特希耶蛇绿岩区是曾被地壳动力搬移的地质单元之一，这些地质单元被称为利西亚推覆。利西亚推覆为若干个冲断层，其中包含中生代早期的第三纪平台、斜坡和盆地演替结构，其主要成分是沉积岩，并有一定量的突出火成岩。这些冲断层以被动大陆边缘的形式重构，北部面向中生代特提斯海的北分支，后者称为新特提斯洋。从构造上来看，利西亚混杂带覆盖利西亚冲断层，并为视为与中生代特提斯（新特提斯）洋地壳潜没相关的一个增生楔。


氮气是一种清洁、干燥的惰性气体。在室温和大气压力下是无色、无味、无毒和不可燃的气体，沸点为-195.8℃，其化学性质不活泼。通常被作为保护气广泛用于冶金、化工、煤炭、食品、医药、电子、磁材、运 输、热处理、轮胎、热电、航空等行业。国内外煤矿应用氮气防灭火，是因为实践表明：氮气具有灭火速度快，既能防火，也能灭火，还能抑制瓦 斯爆炸，无污染环境和机电设备等优点。其实质是向采空区氧化带内或火区内注入一定流量的氮气，使其氧含量降到 5%或 3%以下，达到防火、灭火 和抑制瓦斯爆炸的目的。主要是为了消除瓦斯爆炸危险、防止煤的自然发热和自燃、降低燃烧强度、防止密闭漏风。

As a clean, dry, and inert gas, nitrogen is colorless, odorless, non-toxic, and incombustible under room temperature and atmospheric pressure with a boiling point of -195.8℃. Due to its inactive chemical nature, it’s used widely as a protective gas in industries such as metal, chemical, coal, food, medicine, electronics, magnetic material, transport, heat processing, tyre, thermoelectricity, and aviation. Nitrogen is used in domestic and foreign coal mines for fire-extinguishing as it has been proven to be a quick fire inhibitor and extinguisher. It also provides advantages such as resistance to gas explosion and no pollution to environment or electromechanical equipment. In actual use, a certain flow of nitrogen is injected into the oxidized coal zone or fire zone to reduce the content of oxygen below 5% or 3%, consequently preventing and extinguishing fire or inhibiting gas explosion. It serves the main purposes of eliminating risk of gas explosion, preventing natural heating and self-ignition of coal, reducing combustion intensity, and avoiding leakage of sealing.