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The
T/Q boundary and the Lower Pleistocene in the
Lower Rhine Embayment |
Being
object to geological
studies the time slice from the upper Pliocene till the beginning of
the Middle
Pleistocene in the Lower Rhine Embayment bears many investigation sites
of
international importance, not the least concerning the T/Q boundary.
Besides the classical area
for
research on this subject near Venlo/NL, situated on Peel Block, the
current
project is concentrated on the large browcoal pits of Tagebau Inden
(Rur Valley
Graben) and Tagebau Hambach (Erft Block). This approach enables us to
integrate
interpretations concerning fine stratigraphical as well as
paleogeographical
problems on a larger scale and in respect to diverging tectonical
settings.
Methods applied are - amongst
others - sedimentologv, petrography , heavy-mineral-analysis,
multi-parameter
paleomagnetics, paleontology and geochemistry (ICP-MS).
Aims of the research are
harmonisation of the German and Dutch stratigraphies, setup of a new
lithostratigraphical framework for the different areas of the Lower
Rhine
Embayment and new evidences regarding the drainage patterns of the
rivers Rhine
and Meuse in time and space.
Some
results:
°The succession
in Tagebau Hambach
comprises four partially interfingering
provenance
zones: Rhine (Pliocene), Rhine (Reuver clay /top of Pliocene and Lower
Pleistocene),
Meuse („East-Meuse“, Lower Pleistocene) and a local river (Lower
Pleistocene).
Detailed paleomagnetic and magnetomineralogic study revealed no
evidence of the
Gauss-Matuyama boundary within the Reuver clay and considerable
overprinting
through post-depositional processes leading to the assumption that most
existing
data must be re-evaluated. The studies complete our knowledge about
Tagebau
Hambach.
°The sediments of the „East-Meuse“
at
Inden and Hambach are
partially interfingered with gravels of the „Hauptterrasse“ which gives
evidence to the assumption that this drainage pattern lasted throughout
the whole Lower Pleistocene.
°Investigations
in the
area near Venlo and development of a detailed drainage model for the
whole
region offer solutions to a number of stratigraphical differences
existing
between the Dutch and German points of view. Besides a thorough study
of the
existing literature a considerable amount of new facts lead to a
critical
re-evaluation of the Dutch fine-stratigraphic system based on
pollen-analysis.
°Use of geochemistry provides
a new
powerfull tool for the
purpose of characterisation especially of fine sediments e.g. regarding
their
provenance.
 The
T/Q boundary and the Lower Pleistocene in the
Lower Rhine Embayment
(in detail)
............................................................
Hans Axel Kemna,
Dipl.
Geol.
Institute
for Geology and Mineralogy
University of
Cologne
Zülpicher Straße 49 a
50674 Köln
Tel.:
[49](0221)-470-2540
Fax.: [49](0221)-470-5149
e-mail: hans.kemna@uni-koeln.de
Web:
www.uni-koeln.de |
 |
............................................................
List of Publications:
-
Becker-Haumann, R. & Kemna,
H. A. (2000): Die "Wanderblock-Formation" - Neue Daten zu
einem alten Problem. – DEUQUA 2000, Volume of Abstracts; XX; Bern.
-
Kemna, H. A & Becker-Haumann, R.
(2003???):
Kornmorphologische Untersuchungen mit dem REM an der Wanderblock-Formation
südlich von Basel. – DEUQUA 2002, Volume of Abstracts, Terra Nova; Potsdam.
-
Kemna, H. A & Becker-Haumann, R.
(2003): Die Wanderblock-Bildungen im Schweizer Juragebirge südlich von
Basel: Neue Daten zu einem alten Problem - Ecl. Geol. Helv.,96,
71-83, 11 Abb., 1 Taf.; Basel.
-
Kemna, H. A.
(2003): The T/Q boundary and the Lower Pleistocene in the Lower Rhine
embayment. – International Workshop on Integrated Land-Sea Lithostratigraphic
Correlation, TNO-NITG, Utrecht, Extended Abstracts, 14-17; Utrecht.
-
Kemna,
H. A. (2004): Upper Pliocene and Lower Pleistocene successions in the Lower
Rhine Embayment, Germany: new evidences on stratigraphy and drainage pattern.
– DEUQUA 2004, Abstract Volume, 50; Nijmegen.
-
Kemna,
H. A. (2004): Upper Pliocene and Lower Pleistocene successions in the
open-cast mines Hambach and Inden (Lower Rhine Embayment, Germany): new
evidences on stratigraphy and drainage pattern. – FLAG-SEQS 2004 Meeting,
Programme and Abstract Volume, 10; Siena.
-
Kemna,
H. A. (in prep.): Pliocene and Lower Pleistocene in the Lower Rhine Embayment:
Contributions to Stratigraphy and Fluvial History. – Kölner Forum; Köln.
-
Kemna,
H. A. (in prep.): Upper Pliocene and Lower Pleistocene successions in the
Lower Rhine Embayment, Germany: new evidences on stratigraphy and drainage
pattern. – Netherl. Journ. Geosci. / Geol. Mijnb., Sp. Ed.: From source to
delta – The Rhine, a major fluvial record, ´s-Gravenhage.
-
Kemna,
H. A. & Kasper, H. U. (in prep.):
Trace element geochemistry of Pliocene and Pleistocene fine grained sediments
in the Lower Rhine Embayment: Properties and ways of discrimination according
to provenance.
-
Kemna,
H. A. (in prep.): Grain morphoscopy of Lower Pleistocene sandy deposits near
Tegelen, the Netherlands. – Netherl. Journ. Geosci. / Geol. Mijnb.; ´s-Gravenhage.
-
Neber,
A, Kemna, H. A., Klose, S., Perk, M., Schade, S., Weber, B. & Sobisch, H.-G.
(2004): GEOSUM: a step towards an integrated concept in three dimensional
subsurface modelling. – GeoLeipzig 2004, Volume of Abstracts, 12; Leipzig.
-
Westerhoff, W.
(2004): Upper Pliocene and Lower Pleistocene Rhine-Meuse deposits in the
Tegelen-Reuver type area. With contributions of
H. A. Kemna – DEUQUA 2004,
Excursion Guide, 79-130, 37 Abb., Nijmegen.
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