Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil
Abstract In the NE edge of the Paraná Continental Magmatic Province (PCMP), compound pahoehoe, simple pahoehoe, rubbly flows, pillow lava, and simple pahoehoe/pyroclastic flows linked to ring structures with lithofacies associations have been identified. They belong to the Cretaceous Serra Geral Gro...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Geologia
2020-07-01
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| Series: | Brazilian Journal of Geology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000300302&tlng=en |
| _version_ | 1818950840215404544 |
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| author | Lucia Castanheira de Moraes Hildor José Seer Valdecir de Assis Janasi Francisco de Castro Valente Neto |
| author_facet | Lucia Castanheira de Moraes Hildor José Seer Valdecir de Assis Janasi Francisco de Castro Valente Neto |
| author_sort | Lucia Castanheira de Moraes |
| collection | DOAJ |
| description | Abstract In the NE edge of the Paraná Continental Magmatic Province (PCMP), compound pahoehoe, simple pahoehoe, rubbly flows, pillow lava, and simple pahoehoe/pyroclastic flows linked to ring structures with lithofacies associations have been identified. They belong to the Cretaceous Serra Geral Group. Intercalations of Cretaceous sedimentary deposits linked to the Botucatu Formation are common and can be of aeolian, alluvial, or, more rarely, lacustrine nature. These recurring intercalations indicate that volcanism and sedimentation occurred simultaneously and also attest to their intermittent nature. Geological characteristics of the study area - broadly dominant entablature structure, hypocrystalline basalts with quench textures, types of associated sedimentary deposits, and pillow lavas - support the idea that water was present during volcanic events, especially in the central portion. The recurrence of facies associations in the same stratigraphic section is discussed and is quite different from the stratigraphy that has been described for the south of the PCMP. A preliminary investigation using P2O5 content allowed the identification of five P2O5 basalt types. The distribution of these classes in the logs shows that elaborating a valid chemostratigraphic column for the region is not yet possible. |
| first_indexed | 2024-12-20T09:24:59Z |
| format | Article |
| id | doaj.art-f85ee1b5fd4d44bfa9b049bc6cdfd7c8 |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-12-20T09:24:59Z |
| publishDate | 2020-07-01 |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-f85ee1b5fd4d44bfa9b049bc6cdfd7c82022-12-21T19:45:13ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-46922020-07-0150310.1590/2317-4889202020200003Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, BrazilLucia Castanheira de Moraeshttps://orcid.org/0000-0003-3265-3228Hildor José Seerhttps://orcid.org/0000-0003-2317-4380Valdecir de Assis Janasihttps://orcid.org/0000-0001-7606-982XFrancisco de Castro Valente Netohttps://orcid.org/0000-0002-9652-2588Abstract In the NE edge of the Paraná Continental Magmatic Province (PCMP), compound pahoehoe, simple pahoehoe, rubbly flows, pillow lava, and simple pahoehoe/pyroclastic flows linked to ring structures with lithofacies associations have been identified. They belong to the Cretaceous Serra Geral Group. Intercalations of Cretaceous sedimentary deposits linked to the Botucatu Formation are common and can be of aeolian, alluvial, or, more rarely, lacustrine nature. These recurring intercalations indicate that volcanism and sedimentation occurred simultaneously and also attest to their intermittent nature. Geological characteristics of the study area - broadly dominant entablature structure, hypocrystalline basalts with quench textures, types of associated sedimentary deposits, and pillow lavas - support the idea that water was present during volcanic events, especially in the central portion. The recurrence of facies associations in the same stratigraphic section is discussed and is quite different from the stratigraphy that has been described for the south of the PCMP. A preliminary investigation using P2O5 content allowed the identification of five P2O5 basalt types. The distribution of these classes in the logs shows that elaborating a valid chemostratigraphic column for the region is not yet possible.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000300302&tlng=enLarge Igneous ProvinceParaná Continental Magmatic Provincelithostratigraphyvolcanic facies architecture |
| spellingShingle | Lucia Castanheira de Moraes Hildor José Seer Valdecir de Assis Janasi Francisco de Castro Valente Neto Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil Brazilian Journal of Geology Large Igneous Province Paraná Continental Magmatic Province lithostratigraphy volcanic facies architecture |
| title | Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil |
| title_full | Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil |
| title_fullStr | Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil |
| title_full_unstemmed | Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil |
| title_short | Lithostratigraphy and volcanic facies architecture of the Paraná Continental Magmatic Province in its NE edge with the Alto Paranaíba Arch, Minas Gerais State, Brazil |
| title_sort | lithostratigraphy and volcanic facies architecture of the parana continental magmatic province in its ne edge with the alto paranaiba arch minas gerais state brazil |
| topic | Large Igneous Province Paraná Continental Magmatic Province lithostratigraphy volcanic facies architecture |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892020000300302&tlng=en |
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