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首页> 外文期刊>Andean Geology >Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile
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Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile

机译：智利北部安第斯高地撒拉族的成因与石膏叠层石的演化

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In several salars in the Andes Highlands in Chile, gypsum stromatolites have been described. Stromatolites are structures with organic origin and they are normally formed by carbonates. Field observations achieved in five salars in the Andes of northern Chile have permitted to recognize six stages during the gypsum stromatolites formation, from the growth of the organic mats to their almost disappearance by local erosive agents. The six stages are: 1) formation of the organic mat and start of the mineral structure development, 2) growth of the domes structure by trapping of gases in side of the organic mat, 3) development of the crystal gypsum wall , 4) death of the organic colony and exposition of the stromatolitic domes to the subaerial environment, 5) initial destruction of the dome structure and start of the central cavity filling and 6) final degradation of the structures and formation of the mounds with the gypsum crystals at the top.
机译：在智利安第斯高地的几个撒拉族中，已经描述了石膏叠层石。膨润土是具有有机来源的结构，通常由碳酸盐形成。在智利北部安第斯山脉的五个盐沼中进行的野外观察已允许识别石膏叠层石形成过程中的六个阶段，从有机垫的生长到局部侵蚀剂几乎消失。六个阶段是：1）有机垫的形成和矿物结构发展的开始，2）通过将气体捕获在有机垫的侧面而形成圆顶结构，3）结晶石膏壁的发展，4）死亡。有机集落和层间质穹顶向地下环境的暴露; 5）穹顶结构的初始破坏和中央腔的开始填充; 6）顶部结构的最终降解以及形成带有顶部石膏晶体的土墩。

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