Results 181 to 190 of about 6,364 (209)

3D fold growth in transpression

Tectonophysics, 2016
Abstract Geological folds in transpression are inherently 3D structures; hence their growth and rotation behavior is studied using 3D numerical finite-element simulations. Upright single-layer buckle folds in Newtonian materials are considered, which grow from an initial point-like perturbation due to a combination of in-plane shortening and shearing
openaire   +1 more source

Transpression in an Archean greenstone belt, northern Minnesota

Canadian Journal of Earth Sciences, 1988
Weakly metamorphosed Archean sedimentary and volcanic rocks of the Vermilion district, northern Minnesota, occupy an east–west-trending belt between gneisses of the Vermilion granitic complex to the north and the Giants Range batholith to the south. All the measured strain, a foliation, and a mineral lineation in this belt are attributed to the "main"
P. J. Hudleston, D. Schultz-Ela, D. L. Southwick   +2 more
openaire   +1 more source

Neogene transpressive evolution of the California Coast Ranges

Tectonics, 1994
The San Andreas fault has long been viewed as a vertical structure that extends from the ground surface to the base of the lithosphere and separates the Pacific plate from the North American plate along a transform plate boundary. Analysis of Neogene structures in the central Coast Ranges indicates, however, that crustal blocks defined by strands of ...
David L. Jones, Russell Graymer, Chi Wang, T. V. McEvilly, A. Lomax   +4 more
openaire   +1 more source

Bitumen veins and Eocene transpression, Neuquén Basin, Argentina

Tectonophysics, 1999
Abstract In the northwestern part of the petroleum-rich Neuquen Basin, veins of solid hydrocarbon (bitumen) have been reported from over 150 localities. The bitumen veins are mostly steeply-dipping and show intrusive relationships with their wall rocks. The largest are some 8 m wide, 8 km long and probably several kilometres deep.
P.R. Cobbold, M. Diraison, E.A. Rossello
openaire   +1 more source

Tectonic transpression in Caledonian Spitsbergen

Geological Magazine, 1971
SummaryIn addition to the well-established extension, compression and transcurrent relative movements between plates of the lithosphere, this paper considers intermediate or oblique relative movements, namely, transtension and transpression. Transtension is already well established in oblique zones of ocean spreading which consist of stepped transform ...
openaire   +1 more source

Discussion on transpression and transtension zones

Journal of the Geological Society, 1999
S. Lin, D. Jiang & P. F. Williams write: Transpression and transtension are common geological processes that have been the focus of many recent studies. The international conference on 'Continental Transpressional and Transtensional Tectonics' held in London, England in March 1997 and the Geological Society, London, Special
openaire   +1 more source

Transected folds and transpression: how are they associated?

Journal of Structural Geology, 1992
Abstract Folds transected by cleavage are a distinctive structural feature in the Caledonian-Appalachian orogenic belt. With the advent of a tectonic model of transpression for this belt, there has been an assumption that transected folds are a symptom of transpressive deformation: in particular that clockwise transection signifies sinistral ...
S.H. Treagus, J.E. Treagus
openaire   +1 more source

Sinistral transpression and the Silurian closure of Iapetus

Journal of the Geological Society, 1992
In recent years conflicting models have been proposed for the late Caledonian closure of the Iapetus ocean between Laurentia, Baltica and the Avalonian terranes. Recently published structural and stratigraphic evidence from Britain, Scandinavia, East Greenland and Newfoundland is reviewed and shows that Western Avalonia, Eastern Avalonia and Baltica ...
N. J. SOPER, R. A. STRACHAN, R. E. HOLDSWORTH, R. A. GAYER, R. O. GREILING   +4 more
openaire   +1 more source

Kalpin Transpression Tectonics, Northwestern Tarim Basin, Western China

International Geology Review, 1994
The paper examines the relative importance of strike-slip faulting and lateral crustal deformations in the geologic structure of a portion of the western People's Republic of China. Deformed thrust sheets in the Kalpin area of the western PRC suggest large-scale sinistral strike-slip movement on the Aheqi fault zone along the northwestern margin of the
Lu Huafu, David G. Howell, Jia Dong, Cai Dongsheng, Wu Shimin, Chen Chuming, Shi Yangshen, Zenon C. Valin, Guo Lirh   +8 more
openaire   +1 more source

Andean sinistral transpression and kinematic partitioning in South Georgia

Journal of Structural Geology, 2010
The island of South Georgia exposes remnants of a Late Jurassic to Early Cretaceous Andean magmatic arc and marginal basin system that was compressively deformed during the mid-Cretaceous main Andean Orogeny forming widespread NW-SE trending folds and a coaxial penetrative cleavage displaying a predominantly NE-SW stretching lineation Detailed ...
Curtis, Michael L., Flowerdew, Michael J., Riley, Teal R., Whitehouse, Martin J., Daly, J. Stephen   +4 more
openaire   +2 more sources