Interaction between bimodal volcanism, fluvial sedimentation and basin development in the Permo-Carboniferous Saar-Nahe Basin (south-west Germany)

Stollhofen H, Stanistreet IG (1994)


Publication Language: English

Publication Type: Journal article, Original article

Publication year: 1994

Journal

Publisher: Wiley-Blackwell

Book Volume: 6

Pages Range: 245-267

Journal Issue: 4

DOI: 10.1111/j.1365-2117.1994.tb00088.x

Abstract

Widespread bimodal-calcalkaline magmatism and contemporaneously active faulting reflect
the combined effects of late-orogenic collapse and strike-slip faulting during syn-rift
development of the late-Variscan Saar-Nahe Basin. The intrabasinal drainage systems
experienced major but differing influences from three prominent styles of volcanic
extrusives: extensive basic lava flows; localized acidic domes; and widespread pyroclastic
units.
Sedimentary sections including basic to intermediate lavas show the transformation of
pre-eruptive meandering fluvial systems into lacustrine systems following lava eruptions.
These relationships are interpreted in terms of damming of the drainage systems by the
topographic barriers represented by the basic lavas themselves. Siliciclastic sediments
re-entered and ultimately filled the lakes through prograding, small-scale crevasse
channel / mouth bar complexes.
Uplift associated with the intrusive / extrusive emplacement of acidic domes affected both
the accommodation space and the internal topography of the basin. Following an extrusive
pulse, each dome collapse caused the progradation of voluminous volcaniclastic aprons onto
the surrounding alluvial plain. Locally, the overload by large volumes of unconsolidated
detritus converted the regional meandering drainage system into a braided one. The overall
duration of acidic dome activity could have been longer than lo6 years, but was interrupted
by repose periods varying probably between a few hundred years to several thousand years.
the stratigraphic record. Fine-grained ashes of phreatoplinian eruptions were spread widely
within the basin and overloaded streams in the area of fallout. Rapid reworking of huge
amounts of unconsolidated material supplied an abundance of volcanic detritus, which
tended to fill topographic lows that were usually fault-controlled.
The relationships between basin evolution, intrabasinal volcanism and contemporaneously
active faulting, identified in the Saar-Nahe Basin, are important. They emphasize and
further the understanding of how similar volcanic products in sedimentary basins worldwide
impacted on the depositional system.

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How to cite

APA:

Stollhofen, H., & Stanistreet, I.G. (1994). Interaction between bimodal volcanism, fluvial sedimentation and basin development in the Permo-Carboniferous Saar-Nahe Basin (south-west Germany). Basin Research, 6(4), 245-267. https://doi.org/10.1111/j.1365-2117.1994.tb00088.x

MLA:

Stollhofen, Harald, and Ian G. Stanistreet. "Interaction between bimodal volcanism, fluvial sedimentation and basin development in the Permo-Carboniferous Saar-Nahe Basin (south-west Germany)." Basin Research 6.4 (1994): 245-267.

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