| 王守伦,刘其严,张殿学,李宏臣.闽粤地区海底热液喷气成因铁矿床的地球化学特征[J].地质找矿论丛,1993,(3):14-27 |
| 闽粤地区海底热液喷气成因铁矿床的地球化学特征 |
| GEOCHEMICAL CHARACTERISTICS OF SUB-MARINE HYDROTHERMAL EXHALATED Fe-DEPOSTS IN FUJIAN-GUANGDONG AREA |
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| DOI：10.6053/j.issn.1001-1412.1993.3. 002 |
| 中文关键词: 地球化学 自生沉积物 沉积-喷气成矿作用 硅同位素 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 通过对闽粤地区震旦系、寒武系、泥盆系和石炭一二叠系四个含铁层位中铁矿床的矿石和自生沉积岩的研究认为,它们同属海底热液喷溢产物.初步建立了它们的地球化学标型特征:铁矿石组分TiO2-Al2O3呈正相关、Co/Ni比值和Ge、Cl、F含量均高;铁矿石和自生沉积岩均属低铝-钾-磷型;硅质岩的δ30Si为-0.5‰～0.4‰;铁矿石的ΣREE为3.04～61.84ppm,轻、重稀土分馏不明显,层状热液沉积岩的ΣREE为120.18～551.88ppm,轻、重稀土分馏明显,两者Ce亏损不明显、Eu具弱的正或负异常;铁矿石的残留硅条带中包体均一温度为165～355℃. |
| 英文摘要: |
| Investigations of Fe-ore deposits of Fujian-Guangdong Area in Sinian, Cambrian, Devonian and Permian horizons and the autogenetic sediments reveals that they are resulted from the hydrothermal fluid flooding at sea floor. The typical geochmical chracteristics are established:1. Fe-ores are in high values of Ge, Cl and F showing positive correlation of TiO2 and Al2O3.2. They are low in Al, P and K and have a range of -0.5～0.4‰ for δ30Si of silicious rocks.3. Fe-ores have a REE range of 3.04～61.84 ppm without significant fraetionation of HREE and LREE while the layerd hydrothermal sedimentary rocks has a REE range of 120.18/557.88ppm with significant fractionation of HREE and LREE, and the both have no significant Ce depletion with only weak Eu enrichment or depletion.4. Fluid inclusion in residual bands in Fe-ores has a homogenization temperature range of 165-355° |
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