Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia
Cerro Bravo is an active composite volcano located in the San Diego—Cerro Machín Volcano-Tectonic Province (SCVTP), the northernmost volcanic chain in the Colombian Andes. Among the products associated with the volcano, there is a peculiar “indurated” deposit emplaced between 7 and 2.9 ka, which res...
- Autores:
-
Alarcón, Esteban
Murcia, Hugo
borrero, carlos
Arnosio, Marcelo
- Tipo de recurso:
- http://purl.org/coar/resource_type/c_816b
- Fecha de publicación:
- 2019
- Institución:
- Corporación Universidad de la Costa
- Repositorio:
- REDICUC - Repositorio CUC
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.cuc.edu.co:11323/5906
- Acceso en línea:
- http://hdl.handle.net/11323/5906
https://repositorio.cuc.edu.co/
- Palabra clave:
- Welding
Block and ash flow
Glass transition temperatura
Flattening of glassy fragments
Sintering
Porosity
- Rights
- openAccess
- License
- CC0 1.0 Universal
id |
RCUC2_a1fdc1190144a4f7a7060e362de53b20 |
---|---|
oai_identifier_str |
oai:repositorio.cuc.edu.co:11323/5906 |
network_acronym_str |
RCUC2 |
network_name_str |
REDICUC - Repositorio CUC |
repository_id_str |
|
dc.title.spa.fl_str_mv |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
title |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
spellingShingle |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia Welding Block and ash flow Glass transition temperatura Flattening of glassy fragments Sintering Porosity |
title_short |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
title_full |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
title_fullStr |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
title_full_unstemmed |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
title_sort |
Evidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, Colombia |
dc.creator.fl_str_mv |
Alarcón, Esteban Murcia, Hugo borrero, carlos Arnosio, Marcelo |
dc.contributor.author.spa.fl_str_mv |
Alarcón, Esteban Murcia, Hugo borrero, carlos Arnosio, Marcelo |
dc.subject.spa.fl_str_mv |
Welding Block and ash flow Glass transition temperatura Flattening of glassy fragments Sintering Porosity |
topic |
Welding Block and ash flow Glass transition temperatura Flattening of glassy fragments Sintering Porosity |
description |
Cerro Bravo is an active composite volcano located in the San Diego—Cerro Machín Volcano-Tectonic Province (SCVTP), the northernmost volcanic chain in the Colombian Andes. Among the products associated with the volcano, there is a peculiar “indurated” deposit emplaced between 7 and 2.9 ka, which resembles a block and ash pyroclastic flow deposit. Through field observations, physical property analyses, petrography and scanning electron microscopy (SEM), we demonstrate that this induration is the result of welding processes. High density, deformed glassy fragments with a common orientation, low porosity, fiamme and sintering, are the most visible characteristics. The evidence indicates that welding reached up to rank IV in a I to VI classification scheme. We suggest that welding is associated with (1) high emplacement temperature related to the syneruptive destruction of a growing endogenous dome and (2) a low glass transition temperature related to the influence of upward water diffusion after emplacement of the flow over wet ground. Thus, with emplacement temperatures between 670 and 540 °C, and water contents between 0.5 and 1.2 wt%, the welding process was unusually efficient. Calculations made indicate that for the deposit to present the observed characteristics of welding, the emplacement temperature needed to exceed the threshold of the glass transition temperature for a time of 5–6 days and have an effective viscosity of 1012 Pa s. As a result of the welding, the deposit decreased its thickness by between 15 and 7 m. This work contributes to the knowledge of welding processes and stresses the unusual occurrence of welding in this type of pyroclastic flow deposit which thus requires special emplacement conditions in terms of temperature and water content. |
publishDate |
2019 |
dc.date.issued.none.fl_str_mv |
2019-12-13 |
dc.date.accessioned.none.fl_str_mv |
2020-01-22T20:25:14Z |
dc.date.available.none.fl_str_mv |
2020-01-22T20:25:14Z |
dc.type.spa.fl_str_mv |
Pre-Publicación |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_816b |
dc.type.content.spa.fl_str_mv |
Text |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/preprint |
dc.type.redcol.spa.fl_str_mv |
http://purl.org/redcol/resource_type/ARTOTR |
dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/acceptedVersion |
format |
http://purl.org/coar/resource_type/c_816b |
status_str |
acceptedVersion |
dc.identifier.uri.spa.fl_str_mv |
http://hdl.handle.net/11323/5906 |
dc.identifier.instname.spa.fl_str_mv |
Corporación Universidad de la Costa |
dc.identifier.reponame.spa.fl_str_mv |
REDICUC - Repositorio CUC |
dc.identifier.repourl.spa.fl_str_mv |
https://repositorio.cuc.edu.co/ |
url |
http://hdl.handle.net/11323/5906 https://repositorio.cuc.edu.co/ |
identifier_str_mv |
Corporación Universidad de la Costa REDICUC - Repositorio CUC |
dc.language.iso.none.fl_str_mv |
eng |
language |
eng |
dc.rights.spa.fl_str_mv |
CC0 1.0 Universal |
dc.rights.uri.spa.fl_str_mv |
http://creativecommons.org/publicdomain/zero/1.0/ |
dc.rights.accessrights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
dc.rights.coar.spa.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
rights_invalid_str_mv |
CC0 1.0 Universal http://creativecommons.org/publicdomain/zero/1.0/ http://purl.org/coar/access_right/c_abf2 |
eu_rights_str_mv |
openAccess |
dc.publisher.spa.fl_str_mv |
Universidad de la Costa |
institution |
Corporación Universidad de la Costa |
bitstream.url.fl_str_mv |
https://repositorio.cuc.edu.co/bitstreams/285396c2-200a-422f-9708-3ba6c5c49f66/download https://repositorio.cuc.edu.co/bitstreams/b5774da7-dd32-440f-9fb4-68dce55bb1b1/download https://repositorio.cuc.edu.co/bitstreams/24806189-4276-47a4-85ea-6e028f8b2bda/download https://repositorio.cuc.edu.co/bitstreams/e751aee6-e951-4fe7-b0a5-34c0527ca0ed/download https://repositorio.cuc.edu.co/bitstreams/6a9a7bd1-7b31-4ac7-8630-139c9dd801b3/download |
bitstream.checksum.fl_str_mv |
404baf796110b7ce7f2b131f959f7e50 42fd4ad1e89814f5e4a476b409eb708c 8a4605be74aa9ea9d79846c1fba20a33 5f21fb164a714708e87a5e694220b2bd a8bddf807e179f35adb0c049f7c25cc4 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositorio de la Universidad de la Costa CUC |
repository.mail.fl_str_mv |
repdigital@cuc.edu.co |
_version_ |
1811760680095711232 |
spelling |
Alarcón, EstebanMurcia, Hugoborrero, carlosArnosio, Marcelo2020-01-22T20:25:14Z2020-01-22T20:25:14Z2019-12-13http://hdl.handle.net/11323/5906Corporación Universidad de la CostaREDICUC - Repositorio CUChttps://repositorio.cuc.edu.co/Cerro Bravo is an active composite volcano located in the San Diego—Cerro Machín Volcano-Tectonic Province (SCVTP), the northernmost volcanic chain in the Colombian Andes. Among the products associated with the volcano, there is a peculiar “indurated” deposit emplaced between 7 and 2.9 ka, which resembles a block and ash pyroclastic flow deposit. Through field observations, physical property analyses, petrography and scanning electron microscopy (SEM), we demonstrate that this induration is the result of welding processes. High density, deformed glassy fragments with a common orientation, low porosity, fiamme and sintering, are the most visible characteristics. The evidence indicates that welding reached up to rank IV in a I to VI classification scheme. We suggest that welding is associated with (1) high emplacement temperature related to the syneruptive destruction of a growing endogenous dome and (2) a low glass transition temperature related to the influence of upward water diffusion after emplacement of the flow over wet ground. Thus, with emplacement temperatures between 670 and 540 °C, and water contents between 0.5 and 1.2 wt%, the welding process was unusually efficient. Calculations made indicate that for the deposit to present the observed characteristics of welding, the emplacement temperature needed to exceed the threshold of the glass transition temperature for a time of 5–6 days and have an effective viscosity of 1012 Pa s. As a result of the welding, the deposit decreased its thickness by between 15 and 7 m. This work contributes to the knowledge of welding processes and stresses the unusual occurrence of welding in this type of pyroclastic flow deposit which thus requires special emplacement conditions in terms of temperature and water content.Alarcón, Esteban-will be generated-orcid-0000-0002-9636-9050-600Murcia, Hugo-will be generated-orcid-0000-0002-3570-1988-600borrero, carlos-will be generated-orcid-0000-0002-4907-2078-600Arnosio, MarceloengUniversidad de la CostaCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2WeldingBlock and ash flowGlass transition temperaturaFlattening of glassy fragmentsSinteringPorosityEvidence for welding of a block and ash pyroclastic flow deposit: the case of Cerro Bravo Volcano, ColombiaPre-Publicaciónhttp://purl.org/coar/resource_type/c_816bTextinfo:eu-repo/semantics/preprinthttp://purl.org/redcol/resource_type/ARTOTRinfo:eu-repo/semantics/acceptedVersionPublicationORIGINALEvidence for welding of a block and ash pyroclastic flow deposit.pdfEvidence for welding of a block and ash pyroclastic flow deposit.pdfapplication/pdf253569https://repositorio.cuc.edu.co/bitstreams/285396c2-200a-422f-9708-3ba6c5c49f66/download404baf796110b7ce7f2b131f959f7e50MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8701https://repositorio.cuc.edu.co/bitstreams/b5774da7-dd32-440f-9fb4-68dce55bb1b1/download42fd4ad1e89814f5e4a476b409eb708cMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.cuc.edu.co/bitstreams/24806189-4276-47a4-85ea-6e028f8b2bda/download8a4605be74aa9ea9d79846c1fba20a33MD53THUMBNAILEvidence for welding of a block and ash pyroclastic flow deposit.pdf.jpgEvidence for welding of a block and ash pyroclastic flow deposit.pdf.jpgimage/jpeg61860https://repositorio.cuc.edu.co/bitstreams/e751aee6-e951-4fe7-b0a5-34c0527ca0ed/download5f21fb164a714708e87a5e694220b2bdMD55TEXTEvidence for welding of a block and ash pyroclastic flow deposit.pdf.txtEvidence for welding of a block and ash pyroclastic flow deposit.pdf.txttext/plain2139https://repositorio.cuc.edu.co/bitstreams/6a9a7bd1-7b31-4ac7-8630-139c9dd801b3/downloada8bddf807e179f35adb0c049f7c25cc4MD5611323/5906oai:repositorio.cuc.edu.co:11323/59062024-09-16 16:46:15.805http://creativecommons.org/publicdomain/zero/1.0/CC0 1.0 Universalopen.accesshttps://repositorio.cuc.edu.coRepositorio de la Universidad de la Costa CUCrepdigital@cuc.edu.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 |