Using inherited OSL signals to quantify landscape dynamics: examples from the Jalisco Block to the faults of Sierra de Juaárez (Mexico)

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dc.contributor.authorCastillo, Men_AU
dc.contributor.authorMuñoz-Salinas, Een_AU
dc.contributor.authorFülöp, RHen_AU
dc.contributor.authorCodilean, ATen_AU
dc.contributor.authorArce, JLen_AU
dc.contributor.authorRoy, Pen_AU
dc.contributor.authorLacan, Pen_AU
dc.contributor.authorCaballero, Len_AU
dc.contributor.authorWilcken, KMen_AU
dc.date.accessioned2020-03-23T03:50:43Zen_AU
dc.date.available2020-03-23T03:50:43Zen_AU
dc.date.issued2016-09-28en_AU
dc.date.statistics2020-03-20en_AU
dc.description.abstractCosmogenic radionuclides (CRN) and optically stimulated luminescence (OSL) are two recent geochronological techniques that have expanded the capabilities of quantifying geomorphic processes and the age of landforms. Traditionally, OSL has been used to date the age of deposits (< 0.5 Ma) and in some cases such ages complement the results obtained from CRNs. Here we extend the usage of OSL signals in order to: (1) determine the presence of erosional pulses in low energy depositional settings and (2) explore if OSL signals can provide additional information about the erosion rates in the landscape as 10Be-based catchment-averaged denudation rates do. For the first approach we extracted and analyzed two cores from Sayula and San Marcos lakes located in the triple junction of the Jalisco Block (west-central Mexico). Even though OSL signals exhibit the expected pattern of increasing luminescence age with depth, our analysis of cores using a Pulsed Photon Stimulated Luminescence unit indicate that there has been different rates of deposition and changes in the precedence of sediment. These results are also supported with geochemical analysis of major elements. For the second approach we analyzed the faults of Oaxaca and Donají which form the front of Sierra de Juarez (southern Mexico). From the active channels incising across thefaults we extracted sediment samples to determine the 10Be catchment-averaged erosion rates and to measure the OSL signals. At Donají fault, OSL signals closely scale with 10Be catchment-averaged denudation rates (R2 = 0.78 for IRSL and R2 = 0.71 for BLSL) and the last correlates with the mean basin rainfall (R2 = 0.86). At Oaxaca fault, OSL signals are negatively correlated with 10Be catchment-averaged denudation rates. Based on our OSL and 10Be data, as well as on topographic analyses we propose that the landscape along the Oaxaca fault is in disequilibrium due to the fault offset, whereas in Donají, which is known to be a transfer fault, the landscape seems to have reach a state close to equilibrium. Here we demonstrate that OSL signals, supported with 10Be-derived denudation rates, can yield information on the rates that prevail in the landscape. © 2016 The Geological Society of America(GSA)en_AU
dc.identifier.citationCastillo, M., Muñoz-Salinas, E., Fülöp, R., Codilean, A., Arce, J., Roy, P., Lacan, P., Caballero, L., & Wilcken, K. (2016). Using inherited OSL signals to quantify landscape dynamics: examples from the Jalisco Block to the faults of Sierra de Juárez (Mexico). Paper presented at the GSA Annual Meeting in Denver, USA, 25-28 September 2016.en_AU
dc.identifier.conferenceenddate29 September 2016en_AU
dc.identifier.conferencenameGSA Annual Meetingen_AU
dc.identifier.conferenceplaceDenver, Colarodoen_AU
dc.identifier.conferencestartdate25 September 2016en_AU
dc.identifier.govdoc7386en_AU
dc.identifier.other281-6en_AU
dc.identifier.urihttps://gsa.confex.com/gsa/2016AM/webprogram/Paper278684.htmlen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9191en_AU
dc.language.isoenen_AU
dc.publisherThe Geological Society of Americaen_AU
dc.subjectGeomorphologyen_AU
dc.subjectGeophysicsen_AU
dc.subjectGeological depositsen_AU
dc.subjectAge estimationen_AU
dc.subjectErosionen_AU
dc.subjectMexicoen_AU
dc.subjectLuminescenceen_AU
dc.subjectSedimentsen_AU
dc.titleUsing inherited OSL signals to quantify landscape dynamics: examples from the Jalisco Block to the faults of Sierra de Juaárez (Mexico)en_AU
dc.typeConference Presentationen_AU
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