Late Quaternary climate changes in the Central Sahara: new evidence from palaeoenvironmental research in NE-Niger
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Würzburg
Selbstverlag des Instituts für Geographie der Julius-Maximilians-Universität Würzburg in Verbindung mit der Geographischen Gesellschaft Würzburg
2010
|
| Schriftenreihe: | Würzburger geographische Arbeiten
103 |
| Schlagworte: | |
| Online-Zugang: | Volltext Inhaltsverzeichnis |
| Beschreibung: | Zusammenfassung in deutscher Sprache |
| Beschreibung: | XI, 158 Seiten Illustrationen, Diagramme, Karten 24 cm |
Internformat
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| 100 | 1 | |a Brauneck, Jens |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Late Quaternary climate changes in the Central Sahara |b new evidence from palaeoenvironmental research in NE-Niger |c Jens Brauneck |
| 264 | 1 | |a Würzburg |b Selbstverlag des Instituts für Geographie der Julius-Maximilians-Universität Würzburg in Verbindung mit der Geographischen Gesellschaft Würzburg |c 2010 | |
| 300 | |a XI, 158 Seiten |b Illustrationen, Diagramme, Karten |c 24 cm | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Würzburger geographische Arbeiten |v 103 | |
| 500 | |a Zusammenfassung in deutscher Sprache | ||
| 502 | |b Dissertation |c Julius-Maximilians-Universität Würzburg |d 2008 | ||
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| 651 | 7 | |a Niger |0 (DE-588)4042298-7 |2 gnd |9 rswk-swf | |
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| 912 | |a ebook | ||
Datensatz im Suchindex
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| adam_text |
CONTENTS
List of
figures
.
VI
List of
tables
.
V
Preface
.
VII
Abstract
.
VIII
Zusammenfassung.
Χ
1
Introduction
.1
2
Geographical setting of the study area
.2
2.1
Geomorphology
.2
2.2
The geological framework
.4
2.3
Vegetation
.5
2.4
Present climatic dynamics of Northern Africa
.6
2.5
Geographical setting of the study sites
.10
2.5.1
Seggedim
.10
2.5.2
Fabérgé
depression
.11
2.5.3
Enneri Achelouma
/ Seeterrassental.13
2.5.4
YooAngo
.15
3
Sedimentary deposits as tools for environmental reconstruction
.17
3.1
Physical sediment features
.18
3.1.1
Visual description
.19
3.1.2
Grain size
.20
3.1.3
Magnetic susceptibility
.21
3.2
Sediment chemistry
.21
3.2.1
Organic carbon
.21
3.2.2
Silicon and aluminium
.22
3.2.3
Iron and manganese
.23
3.2.4
Alkali and alkaline earth metals
.23
3.3
Mineralogy
.23
3.3.1
Carbonates
.24
3.3.2
Evaporitic Minerals
.25
3.3.3
Silicate minerals
.26
3.4
Biological Indicators
.26
3.5
Archaeological findings
.27
3.6
Age determination
.28
3.6.1
Radiocarbon dating
.28
3.6.2
Optically stimulated luminescence (OSL) dating
.29
4
Palaeoenvironmental research on North African climate changes
.30
4.1
Palaeoenvironmental reconstruction by proxy data
.30
4.2
Review of palaeoenvironmental evidence from the central Sahara
.36
4.2.1
Seggedim
.37
4.2.2
Falaise de Kaouar
.37
4.2.3
Fachi
.38
4.2.4
Zoo Baba
.38
4.2.5
Adrar Bous.
39
4.2.6
Tenére
.39
4.3
The issue
of the Middle Terrace
.40
4.4
Computer-model-based investigations
.41
4.5
Summary
.44
Materials and Methods
.46
5.1
Fieldwork
.46
5.2
Laboratory methods
.47
5.2.1
Core handling and sample pre-treatment
.47
5.2.2
Physical Methods
.48
5.2.2.1
Sediment texture/grain-size analysis
.48
5.2.2.2
Magnetic susceptibility
.49
5.2.3
Geochemistry
.49
5.2.3.1
ICP-OES
.49
5.2.3.2
X-ray fluorescence spectrometry (XRF)
.50
5.2.3.3
Fuse tablets (XRF)
.50
5.2.3.4
Geoscanner
(XRF)
.51
5.2.3.5
Carbon analysis
.51
5.2.3.6 pH
measurement
.52
5.2.4
Mineralogy
.52
5.2.4.1
XRD
.52
5.2.4.2
Thin sections
.53
5.2.5
Biological Indicators
.53
5.2.5.1 Microfossils.53
5.2.5.2
Palynology
.54
5.3
Age determination
.54
5.4
Data evaluation and quality
.54
5.4.1
Normative stoichiometric calculation
.54
5.4.2
Normalization
.55
5
Coring record from Seggedim
.56
6.1
Results
.56
6.1.1
Magnetic susceptibility
.56
6.1.2
Stratigraphie
units
.57
6.1.3
Mineralogy
.60
6.1.4
Geochemistry
.61
6.1.4.1
ICP-OES
.61
6.1.4.2
Geoscanner
(XRF)
.62
6.1.5
Biological Indicators
.65
6.1.5.1
Estimation of biogenic silica (BSi)
.65
6.1.5.2
Diatoms
.67
6.1.5.3
Pollen spectra
.68
6.1.6
Radiocarbon dating
.69
6.1.7
OSL dating
.69
6.1.8
Determination of the main lake stages
.70
6.1.9
Determinations of geochemical mean values
.71
6.2
Discussion
.73
6.2.2
Conditions
of the
initial
lake
phase
.76
6.2.3
Sedimentation and environmental conditions of the subsequent phases
.77
6.2.4
Carbonates
-
distribution and origin
.78
6.3
Conclusion
.80
7
Supplementary study sites Results
.82
7.1
Fabérgé
.82
7.1.1
Profilel.
82
7.1.2
Profile
3.85
7.1.3
Profile4
.90
7.1.4
OSL-dating
.94
7.1.5
Summary
.94
7.2
Enneri Achelouma
.95
7.2.1
Profilea
.95
7.2.2
Profile
10.100
7.2.3
Profilell
.105
7.2.4
Summary
.110
7.3
YooAngo
.
Ill
7.3.1
Profiled
.
Ill
7.3.2
Profilel3
.116
7.3.3
Summary
.122
7.4
Discussion
.123
7.4.1
Evaluation of the supplementary study sites and data quality
.123
7.4.2
Environmental settings
.125
7.5
Conclusion
.129
8
Synthesis
.131
8.1
Synopsis of palaeoenvironmental reconstruction
.131
8.2
Model of Late Quaternary environmental progression in
NE
Niger
.135
8.3
Conclusion
.141
9
References
.143
10
Appendix
.154
Ш |
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| geographic_facet | Mittlere Sahara Niger |
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| spelling | Brauneck, Jens Verfasser aut Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger Jens Brauneck Würzburg Selbstverlag des Instituts für Geographie der Julius-Maximilians-Universität Würzburg in Verbindung mit der Geographischen Gesellschaft Würzburg 2010 XI, 158 Seiten Illustrationen, Diagramme, Karten 24 cm txt rdacontent n rdamedia nc rdacarrier Würzburger geographische Arbeiten 103 Zusammenfassung in deutscher Sprache Dissertation Julius-Maximilians-Universität Würzburg 2008 Jungquartär (DE-588)4252091-5 gnd rswk-swf Klimaänderung (DE-588)4164199-1 gnd rswk-swf Mittlere Sahara (DE-588)4118214-5 gnd rswk-swf Niger (DE-588)4042298-7 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Mittlere Sahara (DE-588)4118214-5 g Niger (DE-588)4042298-7 g Jungquartär (DE-588)4252091-5 s Klimaänderung (DE-588)4164199-1 s DE-604 Erscheint auch als Online-Ausgabe, PDF urn:nbn:de:bvb:20-opus-235146 2021 Würzburger geographische Arbeiten 103 (DE-604)BV002594680 103 https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-235146 Resolving-System kostenfrei Volltext Digitalisierung UB Regensburg application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=020340151&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Brauneck, Jens Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger Würzburger geographische Arbeiten Jungquartär (DE-588)4252091-5 gnd Klimaänderung (DE-588)4164199-1 gnd |
| subject_GND | (DE-588)4252091-5 (DE-588)4164199-1 (DE-588)4118214-5 (DE-588)4042298-7 (DE-588)4113937-9 |
| title | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger |
| title_auth | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger |
| title_exact_search | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger |
| title_full | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger Jens Brauneck |
| title_fullStr | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger Jens Brauneck |
| title_full_unstemmed | Late Quaternary climate changes in the Central Sahara new evidence from palaeoenvironmental research in NE-Niger Jens Brauneck |
| title_short | Late Quaternary climate changes in the Central Sahara |
| title_sort | late quaternary climate changes in the central sahara new evidence from palaeoenvironmental research in ne niger |
| title_sub | new evidence from palaeoenvironmental research in NE-Niger |
| topic | Jungquartär (DE-588)4252091-5 gnd Klimaänderung (DE-588)4164199-1 gnd |
| topic_facet | Jungquartär Klimaänderung Mittlere Sahara Niger Hochschulschrift |
| url | https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-235146 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=020340151&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV002594680 |
| work_keys_str_mv | AT brauneckjens latequaternaryclimatechangesinthecentralsaharanewevidencefrompalaeoenvironmentalresearchinneniger |