Inversion tectonics along the Western margin of the Bohemian Massif

Schröder, Bernt

doi:10.1016/0040-1951(87)90316-7

Cited by 86 publications

(80 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This event also represents a phase of rapid uplift. The regional significance of this uplift is sedimentologically documented by polymict conglomerates in the surrounding area (Schro¨der 1987;Schro¨der et al, this volume).…”

Section: Discussionmentioning

confidence: 99%

Comparative K–Ar and Rb–Sr age determinations of retrograde processes on rocks from the KTB deep drilling project

Wemmer¹,

Ahrendt²

1997

Geol Rundsch

View full text Add to dashboard Cite

Conventional K-Ar and Rb-Sr age determinations were carried out on fine mineral fractions of the KTB rocks and of rocks from the surrounding area in order to get an idea of the timing of retrograde processes which the rocks had suffered in the Late Variscan and afterwards. Coarse-grained mica minerals were used as reference minerals. It can be demonstrated that conventional K-Ar dating on fine mineral fractions is a useful tool to date retrograde processes in crystalline rocks. For methodical reasons the Rb-Sr method is less suitable. A complex age pattern was found which could be divided into different age groups representing different periods of either penetrative retrograde overprint or formation and reactivation of distinct cataclastic fault zones. Whereas the rocks of the KTB have undergone a penetrative retrograde overprint during the Permo-Triassic without any visible deformation, the Jurassic brought a first reactivation of cataclastic fault zones. In Cretaceous time an overprint led to a pronounced second reactivation of cataclastic fault zones. This latter process turned out to be the important one for the stacking and a repetition of the drilled profile in the KTB. The data and interpretations obtained on the fine mineral fractions coincide excellently with fission track data on sphene from the drill site, with sedimentological records concerning a larger regional scale and with hydrothermal alterations and ore-forming events in mid-Europe.

show abstract

Section: Discussionmentioning

confidence: 99%

Comparative K–Ar and Rb–Sr age determinations of retrograde processes on rocks from the KTB deep drilling project

Wemmer¹,

Ahrendt²

1997

Geol Rundsch

View full text Add to dashboard Cite

show abstract

“…'Laramide' basin inversion in the central and west Netherlands Basin (Van Wijhe, 1987), Lower Saxony basin (Betz et al, 1987) and on the west margin of the Bohemian Massif (Schröder, 1987) attest to continued uplift into the Mid-and Upper Palaeocene. Further inversion between the upper Eocene and the Lower Oligocene coincides with the first substantial magmatic episode in the Odenwald, south of the Rhenish Massif.…”

Section: Relationship Between Magmatism and Basement Upliftmentioning

confidence: 99%

Tertiary-Quaternary intra-plate magmatism in Europe and its relationship to mantle dynamics

Wilson

Downes

2006

Memoirs

View full text Add to dashboard Cite

Anorogenic intra-plate magmatism was widespread in Europe from early Tertiary to Recent times, extending west to east from Spain to Bulgaria, and south to north from Sicily to northern Germany. Magmatism is spatially and temporally associated with Alpine-Pyrenean collisional tectonics, the development of an extensive lithospheric rift system in the northern foreland of the Alps, and, locally, with uplift of Variscan basement massifs (Massif Central, Rhenish Massif, Bohemian Massif). The volcanic regions vary in volume from large central volcanoes (e.g. Cantal, Massif Central;Vogelsberg, northern Germany), to small isolated plugs (e.g. Urach and Hegau provinces in southern Germany). Within the Mediterranean region, the Dinarides, the Pannonian Basin and Bulgaria, anorogenic volcanism locally postdates an earlier phase of subduction-related magmatism.The major and trace element and Sr-Nd-Pb isotope characteristics of the most primitive mafic magmatic rocks (MgO > 6 wt %) provide important constraints on the nature of the mantle source and the conditions of partial melting.. These are predominantly sodic (melilitites, nephelinites, basanites and alkali olivine basalts); however, locally, potassic magma types (olivine leucitites, leucite nephelinites) also occur. In several localities (e.g., Sicily; Vogelsberg and the Rhine Graben, Germany; Calatrava, central Spain) olivine-and quartz-tholeiites form a significant component of the magmatism. The sodic magmas were derived by variable degrees of partial melting (~ 0.5 -5 %) within a transitional zone between garnet-peridotite and spinel-peridotite mantle facies, close to the base of the lithosphere; the potassic magma types are interpreted as partial melts of enriched domains within the lithospheric mantle. Mantle partial melting was induced by adiabatic decompression of the asthenosphere, locally in small-scale, plume-like, diapirs which appear to upwell from ~ 400 km depth. 2Tertiary and Quaternary volcanic activity within Europe occurs in two principal geotectonic settings: referred to as orogenic and anorogenic by Wilson & Bianchini (1999). Occurrences of calc-alkaline volcanism (orogenic) in the Alpine chain, the Carpathians and the Mediterranean region (Harangi et al., this volume) can be explained geodynamically in terms of contemporaneous subduction, and will not be considered further in this review. Here emphasis is placed on the extensive anorogenic, dominantly alkaline, volcanic province to the north of the Alpine collision zone, including the Massif Central of France, the Rhenish Massif of northern Germany, the Rhine Graben, and the Eger Graben within the northern part of the Bohemian Massif in the Czech Republic (Figs. 1 & 2). Further to the east mafic alkaline volcanism (anorogenic) post-dates a major phase of subduction-related volcanism in the Pannonian Basin, the Dinarides (Serbia, Slovenia, Croatia, N. Bosnia), Bulgaria and western Turkey. Further south,within the Mediterranean region, anorogenic volcanism occurs in Sicily, Sardinia, Monte V...

show abstract

“…The NW/SE alignment of some of the granites reflects a system of block faults, which was formed in Upper Carboniferous/Permian time, and reactivated repeatedly until Recent (Bachmann et al 1987, Schroder 1987. One of these faults is the "Franconian Line" (Fig.2), along which the Permian through Tertiary rocks of the western foreland have been downfaulted for locally more than 1000 m (see also the evaluation of seismic data in the contributions by Schmoll et al and Weber and Vollbrecht).…”

Section: Nw-dipping Reflectorsmentioning

confidence: 99%

The Geological Framework of the KTB Drill Site, Oberpfalz

Franke

1989

Exploration of the Deep Continental Crust

View full text Add to dashboard Cite

Inversion tectonics along the Western margin of the Bohemian Massif

Cited by 86 publications

References 9 publications

Comparative K–Ar and Rb–Sr age determinations of retrograde processes on rocks from the KTB deep drilling project

Comparative K–Ar and Rb–Sr age determinations of retrograde processes on rocks from the KTB deep drilling project

Tertiary-Quaternary intra-plate magmatism in Europe and its relationship to mantle dynamics

The Geological Framework of the KTB Drill Site, Oberpfalz

Contact Info

Product

Resources

About