| 刘成维,杨云,谷振飞,马海波,梁永生,缪建普.河北陈家窑磁铁矿成因探讨[J].矿产勘查,2013,4(5):519-524 |
| 河北陈家窑磁铁矿成因探讨 |
| Discussion on the genesis of Chenjiayao iron deposit,Hebei |
| 投稿时间：2013-01-11 |
| DOI： |
| 中文关键词: 宣龙式铁矿床 花岗岩 有机碳 还原作用 磁铁矿 河北 |
| 英文关键词: Xuanlong type iron deposit granite organic carbon reduction magnetite Hebei |
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| 中文摘要: |
| 河北省赤城县陈家窑一带宣龙式赤铁矿受深部及周边燕山期花岗岩侵入体热力影响,在缺氧还原环境下,赋矿围岩中的有机碳将其还原为磁铁矿。含矿岩系上部团山子组中的硅质白云岩、硅质灰岩局部因受热变质,形成透辉石和硅灰石,其中硅灰石在常压下的形成温度为400℃,再加上燕山期花岗岩为深成相的特点,据此,作者推测赤铁矿变质还原成磁性铁的环境温度应在400～600℃之间。 |
| 英文摘要: |
| The Xuanlong type iron deposit is located in the Chenjiayao region, Chicheng County, Hebei Province. Influenced by the heating power from the Yanshanian intrusive granite in the depth and surrounding areas, the Xuanlong type hematite was metamorphosed into magnetite by the organic carbon in the host rock in the oxygen-lacking reducing condition. The siliceous dolomite and limestone of Tuanshanzi Formation on the top of Xuanlong type iron formation are partly metamorphosed into wollastonite and diopside. At the atmospheric pressure, the formation temperature of wollastonite is about 400℃, considering the Yanshanian granite shows the characteristics of plutonic rockmass, therefore it predicts that the temperature of hematite metamorphosed into magnetite is a range between 400 ℃ and 600 ℃. |
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