Results 191 to 200 of about 5,012 (243)

Reply to discussion on ‘From Pan-African transpression to Cadomian transtension at the West African margin: new U–Pb zircon ages from the Eastern Saghro Inlier (Anti-Atlas, Morocco)’ by Errami et al. (SP503, 209–233)

Journal of the Geological Society, 2021
The comment of Ikenne et al. concerns recently described U-Pb baddeleyite ages, around 1.71 and 1.65 Ga, obtained on intrusive sills and dykes in the Taghdout-Lkest Group in the SW domain of the Anti-Atlas (AA).
E. Errami, U. Linnemann, Jamal El Kabouri, M. Hofmann, A. Gärtner, J. Zieger, Jessica Gärtner, Katja Mende, D. Gasquet, Nasser Ennih   +9 more
semanticscholar   +1 more source

Experiments on granite intrusion in transtension

Geological Society, London, Special Publications, 2000
Abstract Granite intrusion in transtensional regime is modelled by injecting a Newtonian fluid into a sand pack containing a ductile layer. The transtensional regime is obtained using two plastic sheets sliding along two rigid horizontal plates, and diverging from two narrow spaces (two fixed velocity discontinuities).
T. Román-Berdiel, A. Aranguren, J. Cuevas, J. M. Tubía, D. Gapais, J.-P. Brun   +5 more
openaire   +1 more source

Transtension of the Romanche transform fault

Oceanology, 2006
Areas of transtension are discovered in the western part of the Romanche transform fault. Geodynamical parameters of the transtension are calculated on the basis of three-dimensional modeling of the inversive magnetic layer using survey data. The interval spreading rates calculated on this basis appeared to be smaller (1.65 cm/y for paleoanomalies C1 ...
Al. A. Schreider, A. A. Schreider, A. A. Bulychev, E. Lodolo, G. L. Kashintsev   +4 more
openaire   +1 more source

The Internal Structure of Dilational Stepovers in Regional Transtension Zones

International Geology Review, 2008
We present a theoretical model and discuss field-based observations from the Carboniferous Northumberland Basin (UK), describing the structures developed at stepovers associated with regionally oblique divergence (i.e., transtension zones). We show that these structures have significantly different geometries and evolution compared to those found in ...
De Paola, Nicola, Holdsworth, Robert E., COLLETTINI, CRISTIANO   +2 more
openaire   +2 more sources

PROVENANCE AND DEFORMATION OF SANDSTONE AND THE HISTORY OF TRANSTENSION IN YUNNAN, CHINA

Geological Society of America Abstracts with Programs, 2021
Brigitte Camille Sabello, Kate Metcalf
openaire   +2 more sources

Partitioned transtension: an alternative to basin inversion models

Journal of Structural Geology, 2005
‘Inversion structures’ (e.g. folds, reverse faults) spatially associated with basin-bounding faults are very widely recognised in rift basins in both onshore and offshore settings worldwide. The great majority of such structures are attributed to local or regional crustal shortening events.
De Paola N., Holdsworth H. R., McCaffrey K. J., BARCHI, Massimiliano Rinaldo   +3 more
openaire   +3 more sources

Transtension in southeastern Africa associated with Gondwana break-up

Geological Society, London, Special Publications, 1998
Abstract The southeastern margin of Africa is marked by a zone of complex faulting associated with crustal extension related to the Mesozoic break-up of Gondwana. The oldest age of faulting (180–175 Ma) displays differences in style in regions with Archaean as opposed to Proterozoic basement.
Watkeys, M. K., Sokoutis, D.
openaire   +1 more source

Transtension and alkaline magmatism of the Romanche Fracture Zone

Geotectonics, 2008
New magnetometric, petrological, and geochemical data on basalts from the central Romanche Fracture Zone (FZ) allow us to classify these rocks into two groups. The igneous rocks from the active part of the fracture zone that experienced transtension are referred to as alkaline rocks.
G. L. Kashintsev, A. A. Shreider, V. I. Maksimochkin, A. A. Bulychev, D. A. Gilod   +4 more
openaire   +1 more source

Early Devonian transpression to transtension in the South Mayo Trough, western Ireland: Small-scale structures related to relative plate motion

Geological Society of America Bulletin
It is difficult to relate polyphase deformational sequences to relative plate motions in pre-Mesozoic plate boundary zones. We give an account of the structural evolution of the Ordovician−Silurian rocks of South Mayo, western Ireland, which form a well ...
J. F. Dewey, Paul D Ryan
semanticscholar   +1 more source

Transtension in Arcs and Orogens

International Geology Review, 2002
Transtension is the oblique divergence between bounding plates or blocks that combines a coaxial orthogonal extension with a deformation zone boundary-parallel, noncoaxial, component, which generates a bulk constrictional strain. The coaxial component determines the rate and amount of crustal/lithospheric thinning and part of the horizontal extension ...
openaire   +1 more source