| 沉积型天青石矿床的地质特征及其成因探讨 |
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| 引用本文： | 杨清堂. 沉积型天青石矿床的地质特征及其成因探讨[J]. 化工矿产地质, 1998, 20(1): 32-37 |
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| 作者姓名： | 杨清堂 |
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| 作者单位： | 化学工业部化学矿产地质研究院 |
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| 摘 要： | 沉积型天青石矿床和蒸发岩类 ,特别是石膏的沉积密切相关 ,含矿地层主要是纹层状叠层石或藻灰岩。天青石中硫、锶同位素值和海水硫、锶同位素值相近。在蒸发条件下海水浓缩到一定浓度时 ,产生天青石沉积 ,或是富锶的硫酸型晶间卤水和钙碳酸盐反应 ,形成交代型天青石。天青石主要分布于蒸发盐盆地的边缘部位 ,位于钙碳酸盐和钙硫酸盐沉积的过渡带
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| 关 键 词： | 天青石矿床 纹层状叠层石 藻灰岩 蒸发岩 沉积机理 |
GENESIS OF A CELESTINE DEPOSIT WITH REFERENCE TO ITS GEOLOGICAL CHARACTERISTCS |
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| Yang Qingtang. GENESIS OF A CELESTINE DEPOSIT WITH REFERENCE TO ITS GEOLOGICAL CHARACTERISTCS[J]. Geology of Chemical Minerals, 1998, 20(1): 32-37 |
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| Authors: | Yang Qingtang |
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| Affiliation: | MCI Geological Institute for Chemical Minerals |
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| Abstract: | A sedimentary celestine deposit has a close link with evaporite sediments, particularly associated with gypsum phase, with the ore hosting rocks prodominated by laminated stromatolite and algal limestone.Compositions of S and Sr isotopes for celestine are similar to those for general sea waters. On sea water evaporation until a critical concentration, or, alternatively, reaction of Sr rich,sulfate type,intercrystalline brine with carbonate may form respectively sedimentary and metasomatic celestines.This bi genetic mineral distributes essentially on marginal parts of evaporitic basins in transpositional zones of carbonate facies to sulfate one. |
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| Keywords: | celestine deposit laminated stromatolite algal limestone evaporite sedimentation mechanism |
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