| 许国建,林新多.论皖南长龙山铁矿床条带状矿石之成因[J].地质找矿论丛,1991,(3):68-75 |
| 论皖南长龙山铁矿床条带状矿石之成因 |
| ON THE ORIGIN OF BANDED IRON ORE OF THE CHANGLONGSHAN DEPOSIT, SOUTHERN ANHUI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1991.3. 007 |
| 中文关键词: 条带状构造 铁矿石成因 沸腾作用 皖南长龙山 |
| 英文关键词: |
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| 中文摘要: |
| 长龙山铁矿床矿石以发育条带状构造为特点,组成条带状矿石的矿物主要为镜铁矿和方解石。研究表明,条带状方解石在微量元素,稳定同位素及流体包裹体特征等方面明显有别于围岩碳酸盐岩地层。条带状矿石的形成方式可能系成矿流体沸腾作用的结果。 |
| 英文摘要: |
| The iron ore of Changlongshan deposit is characterized by band structure in which specularite and calcite alignate perallely alternatively. Bands are not uniform in distribution and occurrence. Ore tex-ture shows that calcite is in the interstitals of speclarite. Therefore, calcite is later than specularite. Calcite in banded ore is obviously different ftom carbonate country rock on the compositions of chemical components, trace elements, carbon and oxygen stable isotopes. The fluid inclusions found in the banded calcite are gasliquid inclusion and polyphased inclusion with daughter mineral, homhgeneous temperature of 239—303℃, salinity of 17.8—36.1Wt% equivalent to NaCl, density of 0.866—1.08g.cm3. Based on the above features, it can be pointed out that the banded iron ore is likely formed byboiling process (even including partinl immiscibility) during the migration and locatoin of mineralizingfluid through layer slip fracture. |
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