Age-Depth Modeling (DFG)

The age models of[nbsp]fluvio-lacustrine sedimentary sequences are often subject of discussions in paleo- climate research. The techniques employed to build an age model are very diverse, ranging from visual or intuitive estimation of the age-depth relationship over linear or spline interpolations between age control points to sophisticated Bayesian techniques also taking into account the most likely deposition times of the type of sediment within the sequence. All these methods, however, fail in detecting abrupt variations in sedimentation rates, including the possibility of episodes of no deposition (hiatus), which is the strength of the method presented in this work. The new technique simply compares the deposition time of equally thick sediment slices from the differences of subsequent radiometric age dates and the unit deposition times of the various sediment types. The percentage overlap of the distributions of these two sources of information, together with the evidence from the sedimentary record, helps to build an age model of complex sequences including abrupt variations in the rate of deposition including one or many hiatuses.

Publications:

Trauth, M.H. (2014) A new probabilistic technique to build an age model for complex stratigraphic sequences. Quaternary Geochronology, 22, 65-71.

How to use the MATLAB Script:

MATLAB ScriptInput AgesInput Section

Save the three files script.txt, input_ages.txt and input_section.txt in your MATLAB search path, rename script.txt into script.m. Then launch MATLAB and type the command script after the prompt, press return. Read the paper and understand the use of the script.

How to use the MATLAB GUI Script:

MATLAB GUI ScriptMATLAB GUI InterfaceInput Ages, Input Section

Save the four files trauthagemodeling_m.txt, trauthagemodeling_fig.txt, input_ages.txt and input_section.txt in your MATLAB search path, rename trauthagemodeling_m.txt into trauthagemodeling.m and trauthagemodeling_fig.txt into trauthagemodeling.fig. Then launch MATLAB and type the command script after the prompt, press return. Read the paper and understand the use of the script.

 

Zurück