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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Mineral chemistry and geothermometry of Fe-Ti oxides in the Khanlogh magnetite-apatite ore, northwest of Neyshabour, NE Iran
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Mineral chemistry and geothermometry of Fe-Ti oxides in the Khanlogh magnetite-apatite ore, northwest of Neyshabour, NE Iran

机译：伊朗内伊沙伯西北部Khanlogh磁铁矿-磷灰石矿石中Fe-Ti氧化物的矿物化学和地热法

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摘要

The Khanlogh iron deposit is located to the northwest of Neyshabour in NE Iran within the Cenozoic Sabzevar-Quchan magmatic arc. The ores are hosted by a series of subvolcanic bodies of intermediate composition (dioritic porphyries) of Oligocene age. Mineralization in the study area occurs as vein, stockwork, disseminations, and open-space fillings of fault breccias within the host rocks. Microscopic and SEM examinations demonstrate that magnetite, apatite, and diopside are the main constituent minerals of the ores. Magnetite crystals contain exsolved inclusions of ilmenite in trellis and dispersed forms. Mineral chemistry data show that the minor oxide constituents in magnetite are V2O3 (0.6%), TiO2 (1.8%), MnO (0.2%), and MgO (0.6%), and in ilmenite include MgO (3.3%), V2O3 (1.9%) and MnO (2.6%). The higher amounts of vanadium in ilmenite relative to the host magnetite is due to substitution of V4+ for Ti4+ in the crystal structure of ilmenite. Geothermometry on magnetite and associated exsolved ilmenite indicate that the Khanlogh iron ores developed at temperatures of approximately 550 degrees C and fo(2) approximate to 10(-18) atm. The ore-forming fluids at Khanlogh had high contents of Fe, Ti, and P, and likely originated from calc-alkaline-tholeiitic magmas.
机译：Khanlogh铁矿床位于新生代Sabzevar-Quchan岩浆弧内，位于伊朗东北部Neyshabour的西北部。矿石由渐新世年龄的一系列中等组成的亚火山体（闪长斑岩）所包裹。研究区的矿化作用是通过主岩内的脉状，储层，扩散和断层角砾岩的开阔空间填充而发生的。显微镜和SEM检查表明，磁铁矿，磷灰石和透辉石是矿石的主要组成矿物。磁铁矿晶体中含有溶解的网格状和分散形式的钛铁矿夹杂物。矿物化学数据表明，磁铁矿中的次要氧化物成分为V2O3（0.6％），TiO2（1.8％），MnO（0.2％）和MgO（0.6％），钛铁矿中的MgO（3.3％），V2O3（1.9） ％）和MnO（2.6％）。钛铁矿中钒含量相对于主体磁铁矿更高，这是由于钛铁矿晶体结构中的V4 +替代了Ti4 +。磁铁矿和相关的溶解的钛铁矿上的地热测定表明，Khanlogh铁矿石在大约550摄氏度的温度下发展，fo（2）接近10（-18）atm。 Khanlogh的成矿流体中Fe，Ti和P含量很高，很可能起源于钙碱性高渗岩浆。

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