Lithofacies variability and facies analysis of a Givetian reef in the southwestern Lahn Syncline (Rhenish Massif, Germany)

Author:

Königshof PeterORCID,Loos Steffen,Rutkowski Julia

Abstract

AbstractA 200 m thick drill core penetrating the Givetian Hahnstätten Reef in the southwestern Lahn Syncline (Rhenish Massif) was investigated. A range of different depositional environments is described based on lithofacies and microfacies analysis. All in all, nine lithofacies types (FTs) are distinguished, which can include subfacies types. The majority of lithofacies of these ultrapure carbonates is represented by lime mudstone and fenestral microbialites, all pointing to shallow subtidal, intertidal to even supratidal low-energy palaeoenvironments. In contrast, more high-energy parts of the reef were dominated by bioclastic rubble deposits (e.g. rudstone). Autochthonous, reef-building carbonates are represented by bafflestone and framestone. Diversity of reef building organisms (stromatoporoids and corals) is low and is dominated byStachyodes,Actinostroma,Stromatopora, andThamnoporaand alveolitids, respectively. Other bioclasts are brachiopods, gastropods, ostracods, foraminifera, echinoderms, trilobites, and conodonts in descending order. Development of the Hahnstätten Reef is interpreted as having been controlled mainly by synsedimentary tectonics and volcanism with contributions from eustasy. The occurrence ofStringocephalus burtiniin the entire section and conodont findings, which provide more precise biostratigraphic data confirm an early to middle Givetian age (Polygnathus rhenanus/varcusZone toPolygnathus ansatusZone) of the succession. The average quality of the ultrapure carbonates lies at 97.68% CaO (excl. loss of ignition), with 70% of the core ranging between 98% and 99% CaO. This extremely high purity makes it difficult to identify correlations between lithofacies and geochemical data.

Funder

Senckenberg Forschungsinstitut und Naturmuseum Frankfurt

Publisher

Springer Science and Business Media LLC

Subject

Paleontology,Geology,Ecology,Ecology, Evolution, Behavior and Systematics,Global and Planetary Change

Reference82 articles.

1. Aboussalam, Z.S., & Becker, R.T. (2016). A lower Frasnian reef drowning episode at Walheim (Aachen region, Inde Syncline, NW Rhenish Massif). In R.T. Becker, S. Hartenfels, P. Königshof, & S. Helling (Eds.), Middle Devonian to Lower Carboniferous stratigraphy, facies, and bioevents in the Rhenish Massif, Germany – an IGCP 596 Guidebook. Münstersche Forschungen zur Geologie und Paläontologie, 108, 14–28.

2. Aharon, P., Socki, R.A., & Chan, L. (1987). Dolomitization of atolls by seawater convection flow: test of a hypothesis at Niue, South Pacific. Journal of Geology, 95, 187–203.

3. Becker, R.T., Aboussalam, Z.S., Hartenfels, S., Nowak, H., Juch, D., & Drozdzewski, G. (2016a). Drowning and sedimentary cover of Velbert Anticline reef complexes (northwestern Rhenish Massif). In R.T. Becker, S. Hartenfels, P. Königshof, & S. Helling (Eds.), Middle Devonian to Lower Carboniferous stratigraphy, facies, and bioevents in the Rhenish Massif, Germany – an IGCP 596 Guidebook. Münstersche Forschungen zur Geologie und Paläontologie, 108, 76–101.

4. Becker, R.T., Königshof, P., & Brett, C.E. (2016b). Devonian climate, sea level and evolutionary events: an introduction. In R.T. Becker, P. Königshof, & C.E. Brett (Eds.), Devonian Climate, Sea Level and Evolutionary Events. Geological Society, London, Special Publication, 423, 1–10.

5. Braun, R., Oetken, S., Königshof, P., Kornder, L., & Wehrmann, A. (1994). Development and biofacies of reef-influenced carbonates (Lahn Syncline, Rheinisches Schiefergebirge). Courier Forschungsinstitut Senckenberg, 169, 351–386.

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