Sedimentologische Analysen zur Abschätzung der Bodenbildungsintensitäten an einem mehrphasigen Küstenschwemmfächer in der Atacamawüste (Paposo, Nordchile)

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Title:Main Title: Sedimentologische Analysen zur Abschätzung der Bodenbildungsintensitäten an einem mehrphasigen Küstenschwemmfächer in der Atacamawüste (Paposo, Nordchile)
Description:Abstract: Hyperarid spaces such as the Atacama Desert occupy a special position in scientific questions. This is particularly true for processes such as the surface development and soil formation. Investigations on a multiphase alluvial fan created several results regarding these proceses. These processes were investigated based on different laboratory methods, just like the estimation of carbonate, grain size analysis and CNS-analysis. Four different generations of alluvial fans (A0, A1, A2, A3) were identified. They have got different times of sedimentation during the Holocene/Pleistocene. Because of that there is the presumption that they also have got different soil formation intensities. The youngest generation is characterized of coarse grain size, little to no organic substance and barely chemical weathering. This looks different with the other generations of alluvial fans. Due to the laboratory results obtained, the oldest generation (A3) can be divided into expired soil formation processes and intensities. There are physical weathering processes because of the finer grain size, the organic substance is the highest of all generations, despite the fact that because of the hyperaridity of the location the values are quite low. The consideration of the results of the pH-value as well as nitrogen does not leave clear conclusions for the distinction. The formation of pedogenic iron oxides (Feo and Fed) is also the most pronounced on the oldest generation. Also, all weathering indices (CIA, CIW) clearly show that weathering and, as a result, soil formation in the A3 generation is the strongest. However, only a relatively small number of samples (n = 34) were evaluated and not all laboratory methods were processed with the complete number of samples.
Responsible Party
Creator:Christopher Tittmann (Author)
Contributors:Wolfgang Römer (Supervisor), Philipp Schulte (Supervisor), Janek Walk (Supervisor)
Funding Reference:Deutsche Forschungsgemeinschaft (DFG): CRC 1211: Earth - Evolution at the Dry Limit
Publisher:CRC1211 Database (CRC1211DB)
Publication Year:2019
Topic
CRC1211 Topic:Surface
Related Subproject:C2
Subjects:Keywords: Soil Sciences, Geomorphology, Paleoclimate Proxies, Arid Zone
Geogr. Information Topic:Environment
File Details
Filename:MA_Tittmann_2019_Bodenbildung_CAF_Paposo.pdf
Data Type:Text - Text
File Size:5.6 MB
Date:Created: 09.08.2019
Mime Type:application/pdf
Data Format:PDF
Language:German
Status:Completed
Constraints
Download Permission:Only Project Members
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:[CRC1211DB] Data policy agreement
Geographic
Specific Information - Report
Report Date:9th of August, 2019
Report Type:Master Thesis
Report City:Aachen
Report Institution:RWTH Aachen University
Metadata Details
Metadata Creator:Janek Walk
Metadata Created:13.11.2019
Metadata Last Updated:13.11.2019
Subproject:C2
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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