Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/187823
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Controlling factors and implications for travertine and tufa deposition in a volcanic setting

AutorRodríguez-Berriguete, Álvaro CSIC ORCID; Alonso-Zarza, Ana María CSIC ORCID
Palabras claveTravertine
Tufa
Aragonite
Calcite
BiofilmInorganic CaCO3
Fecha de publicación1-mar-2019
EditorElsevier
CitaciónSedimentary Geology 381: 13-28 (2019)
ResumenThis work studies a fossil system of perched and fluvial travertines passing distally to fluvial tufas within a volcanic ravine. Sedimentology, petrology and geochemistry of fossil aragonitic-calcitic travertines and downstream calcitic tufas from the Azuaje volcanic ravine were studied. These spring-related carbonates seem to be formed after the Mid-Holocene climate change, the transition from a monsoon-dominated humid climate to an arid-semiarid climate controlled by trade winds. The main travertine facies include rafts, dendrites/shrubs, ooids, oncoids and stromatolites among others, whereas tufas are characterised by phytoclasts, oncoids, coated stems, intraclasts and stromatolites. Facies observed can be (i) microbial-influenced when the microbial growth rate is greater than the precipitation rate and flow energy is not above the threshold value tolerated by microbes, or (ii) inorganic-dominated if the precipitation rate exceeds that of the microbial growth rate and/or flow energy is above the threshold tolerated by microbes. Travertine facies vary from mostly inorganic to microbially-dominated, whereas tufa facies are mostly microbially-influenced. Observed changes of facies in both travertines and tufas were interpreted as due to changes in environmental conditions from (a) less to more evaporative, (b) less saturated to oversaturated, and (c) high to low energy. Changes in textures, mineralogy, geochemistry and stable isotope composition downstream from travertine to tufa suggest a decrease in the CaCO3 precipitation rate and an increase in microbial influence from travertines (proximal part of the system) to (distal) tufas. Our study case illustrates the wide variety of facies and processes operating in spring-related travertine and tufa deposits. The details of arrangement, mineralogy, facies and geochemistry of the deposits were mostly controlled by climate and hydrogeology, although the volcanic setting, provided suitable conditions for spring‑carbonate deposition.
Versión del editorhttps://doi.org/10.1016/j.sedgeo.2018.12.001
URIhttp://hdl.handle.net/10261/187823
DOI10.1016/j.sedgeo.2018.12.001
ISSN0037-0738
Aparece en las colecciones: (IGEO) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

24
checked on 23-mar-2024

WEB OF SCIENCETM
Citations

20
checked on 23-feb-2024

Page view(s)

217
checked on 28-mar-2024

Download(s)

33
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.