Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile
ABSTRACT 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...
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Servicio Nacional de Geología y Minería (SERNAGEOMIN)
2019
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oai:scielo:S0718-710620190001002112019-02-18Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern ChileErcilla Herrero,Oscar Stromatolite Salars Gypsum Andes Highlands Chile ABSTRACT 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.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.46 n.1 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000100211en10.5027/andgeov46n1-3029 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
Stromatolite Salars Gypsum Andes Highlands Chile |
| spellingShingle |
Stromatolite Salars Gypsum Andes Highlands Chile Ercilla Herrero,Oscar Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| description |
ABSTRACT 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. |
| author |
Ercilla Herrero,Oscar |
| author_facet |
Ercilla Herrero,Oscar |
| author_sort |
Ercilla Herrero,Oscar |
| title |
Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| title_short |
Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| title_full |
Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| title_fullStr |
Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| title_full_unstemmed |
Origen and evolution of gypsum stromatolites in salars of the Andes highlands, northern Chile |
| title_sort |
origen and evolution of gypsum stromatolites in salars of the andes highlands, northern chile |
| publisher |
Servicio Nacional de Geología y Minería (SERNAGEOMIN) |
| publishDate |
2019 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000100211 |
| work_keys_str_mv |
AT ercillaherrerooscar origenandevolutionofgypsumstromatolitesinsalarsoftheandeshighlandsnorthernchile |
| _version_ |
1714205861459525632 |