Morlock, Marina A.; Vogel, Hendrik; Russell, James M.; Anselmetti, Flavio S.; Bijaksana, Satria (2021). Quaternary environmental changes in tropical Lake Towuti, Indonesia, inferred from end‐member modelling of X‐ray fluorescence core‐scanning data. Journal of quaternary science JQS, 36(6), pp. 1040-1051. Wiley 10.1002/jqs.3338
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Continental and marine sediments are composed of a mixture from different sources and are influenced by a variety of environmental factors and transport processes prior to deposition. For analysis and interpretation, these sources and processes are often challenging to disentangle. We show that end-member modelling of X-ray fluorescence (XRF) core-scanning data helps to overcome these challenges by unmixing different environmental signals from high-resolution sediment geochemical records. We apply this approach to a 100 m long lacustrine succession from Lake Towuti, Indonesia, to separate the regional climate and tectonic history from local ecological and diagenetic processes. The resulting six end-members (EMs) are interpreted to represent changes in ecological (EM1), climatic (EMs 2–4), tectonic (EM 5) and geomorphic (EM6) processes determining changes in sediment composition. Because end-member analysis allows for the tracking of transient and overlapping processes, climatic changes can be followed throughout the 100 m-long succession, suggesting alternating wet and dry periods in Central Sulawesi over long (several 100 000 years) time scales. We show that end-member analysis on elemental data sets offers a detailed and objective means to disentangle depositional processes in sedimentary successions resulting from varying tectonic and environmental factors involved in sediment formation and deposition.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Institute of Geological Sciences 10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) |
UniBE Contributor: |
Morlock, Marina Alexandra, Vogel, Hendrik, Anselmetti, Flavio |
Subjects: |
500 Science > 550 Earth sciences & geology |
ISSN: |
0267-8179 |
Publisher: |
Wiley |
Language: |
English |
Submitter: |
Hendrik Vogel |
Date Deposited: |
14 Jul 2021 15:02 |
Last Modified: |
11 Jan 2023 23:22 |
Publisher DOI: |
10.1002/jqs.3338 |
BORIS DOI: |
10.48350/157549 |
URI: |
https://boris.unibe.ch/id/eprint/157549 |
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