| 黄 杰.陕南马岭关杂岩中斜长角闪岩的矿物学特征及其对Fe-Ti矿化的启示[J].地质与勘探,2015,51(5):907-922 |
| 陕南马岭关杂岩中斜长角闪岩的矿物学特征及其对Fe-Ti矿化的启示 |
| Mineralogical characteristics of the plagioclase amphibolites of the Malingguan complex in southern Shaanxi Province and their implications for Fe-Ti mineralization |
| 投稿时间：2014-08-25 修订日期：2014-07-27 |
| DOI： |
| 中文关键词: 马岭关杂岩 斜长角闪岩 矿物学特征 Fe-Ti矿化 陕南 |
| 英文关键词: Malingguan complex,plagioclase amphibolite,mineralogical characteristics,Fe-Ti mineralization,southern Shanxi Province |
| 基金项目:国家科技支撑计划项目（2006BAB01A11）；广西自然科学基金项目（2013GXNSFAA019272）；桂林理工大学人才引进科研启动基金项目（002401003364）；中国地质调查局地质矿产调查评价项目（1212011121091）联合资助。 |
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| 中文摘要: |
| 陕南安康地区马岭关杂岩中分布有大量的变质基性岩（斜长角闪岩），其TiO2含量变化较大，在1.80%~5.95%之间，可划分为低钛与高钛两种类型。岩石学、矿物学、地球化学的详细研究表明，有利于Fe-Ti成矿的是高钛斜长角闪岩，其源岩为富Fe-Ti基性岩类。矿物化学研究表明，钛铁氧化物主要以钛铁矿形式存在，化学成分上具富锰贫镁特征，与攀西地区岩浆型钒钛磁铁矿中钛铁矿的特征明显不同，是海底基性火山活动形成的产物后又经区域变质作用改造形成的，其Fe-Ti矿化作用经历了原岩的初始富集、板块深俯冲过程中的进变质Fe-Ti矿化作用和后期退变质Fe-Ti矿化作用三个主要成矿阶段。 |
| 英文摘要: |
| There exist many metabasic rocks (plagioclase amphibolites) in the Malingguan complex in the Ankang area, southern Shaanxi Province. Their TiO2 contents are highly variable, ranging 1.80%~5.95%. They can be divided into two types of high-Ti and low-Ti plagioclase amphibolites. Detailed petrological, mineralogical and geochemical studies show that Fe-Ti mineralization is favorably related to Ti-high plagioclase amphibolites. The results of electronic probe show that Fe-Ti oxides consist mostly of ilmenite with higher content of MnO and lower MgO，and are obviously different from that of ilmenite in the vanadium-titanium-magnetite ore deposits of the magmatic type in the Panzihua area. They formed in a marine environment that was genetically related to basic volcanism and later were subjected to regional metamorphism. The Fe-Ti mineralization of plagioclase amphibolites experienced three stages: primary Fe-Ti enrichment in protolithes of plagioclase amphibolites, Fe-Ti mineralization during prograde metamorphism of plate deep subduction and Fe-Ti mineralization during the later retrograde metamorphism. |
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