Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2016
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| _version_ | 1876447633941200896 |
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| author | Alberto Blanco |
| author_facet | Alberto Blanco |
| contents | Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite Alberto Blanco Susana Abigail Ángeles-Trigueros Juan Hernández-Ávila Luis E. Silva-Martínez Francisco Javier Zavala-Díaz de la Serna Silvia Patricia Ambrocio-Cruz Carlos Castañeda-Posadas Ciencias de la Tierra Biomorphs diagenesis iron sulfides Upper Cretaceous The purpose of this work is to provide a description of biomorphic structures found in sedimentary pyrite present in the organic-rich marine limestone of the Agua Nueva Formation (Upper Cenomanian, Upper Cretaceous), central Mexico, using scanning electron micro - scope images. Six types of biomorphic structures were found and inter - preted as coccoids (type 1), stomatocysts (types 2 and 3), pollen (types 4 and 5) and tubular structures corresponding to bacterial sheaths (type 6). Energy-dispersive X-ray spectroscopy analysis revealed iron and sulfur within the analyzed structures, indicating that they were replaced by pyrite. Furthermore, the high content of elemental carbon in the biostructures, in contrast to the surrounding pyrite in which this element is absent, suggests that the biostructures are of biotic origin. The coccoids and tubular elements were interpreted as autochthonous bacterial fossils or remains of bacterial activity associated with pyrite formation. In contrast, the stomatocysts and pollen represent alloch - thonous elements imported from continental areas. 2016 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57248799009 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.3 Vol.33 |
| format | Artículo científico |
| id | redalyc_57248799009 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite Alberto Blanco Ciencias de la Tierra Biomorphs diagenesis iron sulfides Upper Cretaceous Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite Alberto Blanco Susana Abigail Ángeles-Trigueros Juan Hernández-Ávila Luis E. Silva-Martínez Francisco Javier Zavala-Díaz de la Serna Silvia Patricia Ambrocio-Cruz Carlos Castañeda-Posadas Ciencias de la Tierra Biomorphs diagenesis iron sulfides Upper Cretaceous The purpose of this work is to provide a description of biomorphic structures found in sedimentary pyrite present in the organic-rich marine limestone of the Agua Nueva Formation (Upper Cenomanian, Upper Cretaceous), central Mexico, using scanning electron micro - scope images. Six types of biomorphic structures were found and inter - preted as coccoids (type 1), stomatocysts (types 2 and 3), pollen (types 4 and 5) and tubular structures corresponding to bacterial sheaths (type 6). Energy-dispersive X-ray spectroscopy analysis revealed iron and sulfur within the analyzed structures, indicating that they were replaced by pyrite. Furthermore, the high content of elemental carbon in the biostructures, in contrast to the surrounding pyrite in which this element is absent, suggests that the biostructures are of biotic origin. The coccoids and tubular elements were interpreted as autochthonous bacterial fossils or remains of bacterial activity associated with pyrite formation. In contrast, the stomatocysts and pollen represent alloch - thonous elements imported from continental areas. 2016 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57248799009 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.3 Vol.33 |
| title | Microscopic biomorphic structures in Upper Cretaceous marine sedimentary pyrite |
| topic | Ciencias de la Tierra Biomorphs diagenesis iron sulfides Upper Cretaceous |
| url | https://www.redalyc.org/articulo.oa?id=57248799009 |