Environmental impacts on speleothems caused by public visitation with carbide lamps in Santana Cave (State Tourist Park of Alto Ribeira, Iporanga-SP)
| Autor: | Lobo, Heros Augusto Santos, Boggiani, Paulo César, Sayeg, Isaac Jamil, Perinotto, José Alexandre de Jesus [UNESP] |
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| Přispěvatelé: | Universidade Federal de São Carlos (UFSCar), Universidade de São Paulo (USP), Universidade Estadual Paulista (UNESP) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2022-04-29T07:26:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01 Calcium carbide is a chemical compound artificially produced by the combination of coal and limestone. It has been widely used as fuel for simple devices called carbide lamps which are used as a source of light in the exploration and tourist visitation of caves. Inside the lamp, the carbide reacts when mixed with water and releases acetylene, which is a flammable gas that fuel the fire-based illumination. Santana Cave (State Tourist Park of Alto Ribeira-SP) has been regularly visited both for tourism and research since the 70’s, and the visible darkening on its speleothems has been attributed to the use of carbide lamps, which are prohibited inside the said cave since 2003. To check this hypothesis, samples from speleothems were collected for mineral investigation with the aid of optical and electronic microscope and complemented by chemical analyses. The signs of physical changes and carbon residues that were noticed under the microscope, together with the presence of approximately 0.45[%] of residual carbon identified by chemical analysis, prove the negative impact of the usage of carbide lamps inside caves. The conclusion reinforces the need to restrain the use of carbide lamps inside caves, with tourist purposes, either because of the risks to the cave visitors. Universidade Federal de São Carlos Centro de Ciências Humanas e Biológicas Departamento de Geografia Turismo e Humanidades, Rodovia João Leme dos Santos (SP 264), Km 110 Universidade de São Paulo Instituto de Geociências Departamento de Geologia Sedimentar e Ambiental, Rua do Lago, 562 Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas Departamento de Geologia Aplicada, Avenida 24-A, 1515 Universidade Estadual Paulista Instituto de Geociências e Ciências Exatas Departamento de Geologia Aplicada, Avenida 24-A, 1515 |
| Databáze: | OpenAIRE |
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