Cenozoic deformation in the Tethyan Himalaya, SE Tibet: Insights from magnetic fabrics and structural analysis of Upper Triassic flysch

2021 ◽  
pp. 228967
Author(s):  
Xinwen Cao ◽  
Zhiming Sun ◽  
Haibing Li ◽  
Yong Cao ◽  
Baochun Huang ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Upper Triassic ◽  
Magnetic Fabrics ◽  
Se Tibet ◽  
Tethyan Himalaya

Upper Triassic turbidites of the northern Tethyan Himalaya (Langjiexue Group): The terminal of a sediment-routing system sourced in the Gondwanide Orogen

2016 ◽  
Vol 34 ◽  
pp. 84-98 ◽  
Author(s):  
Jian-Gang Wang ◽  
Fu-Yuan Wu ◽  
Eduardo Garzanti ◽  
Xiumian Hu ◽  
Wei-Qiang Ji ◽  
...  
Keyword(s):  
Upper Triassic ◽  
Sediment Routing ◽  
Tethyan Himalaya

Paleomagnetic evidence for clockwise rotation and tilting in the eastern Tethyan Himalaya (SE Tibet): Implications for the Miocene tectonic evolution of the NE Himalaya

2010 ◽  
Vol 493 (1-2) ◽  
pp. 172-186 ◽  
Author(s):  
Borja Antolín ◽  
Erwin Appel ◽  
Richard Gloaguen ◽  
István Dunkl ◽  
Lin Ding ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Clockwise Rotation ◽  
Se Tibet ◽  
Tethyan Himalaya

Kinematic evolution of the eastern Tethyan Himalaya: constraints from magnetic fabric and structural properties of the Triassic flysch in SE Tibet

2011 ◽  
Vol 349 (1) ◽  
pp. 99-121 ◽  
Author(s):  
Borja Antolín ◽  
Erwin Appel ◽  
Chiara Montomoli ◽  
István Dunkl ◽  
Lin Ding ◽  
...  
Keyword(s):  
Structural Properties ◽  
Magnetic Fabric ◽  
Kinematic Evolution ◽  
Se Tibet ◽  
Tethyan Himalaya

Provenance and tectonic setting of Upper Triassic turbidites in the eastern Tethyan Himalaya: Implications for early-stage evolution of the Neo–Tethys

2020 ◽  
Vol 200 ◽  
pp. 103030 ◽  
Author(s):  
Y.M. Liu ◽  
J.G. Dai ◽  
C.S. Wang ◽  
H.A. Li ◽  
Q. Wang ◽  
...  
Keyword(s):  
Early Stage ◽  
Tectonic Setting ◽  
Upper Triassic ◽  
Tethyan Himalaya

Cenozoic low temperature cooling history of the Northern Tethyan Himalaya in Zedang, SE Tibet and its implications

2015 ◽  
Vol 643 ◽  
pp. 80-93 ◽  
Author(s):  
Guangwei Li ◽  
Yuntao Tian ◽  
Barry P. Kohn ◽  
Mike Sandiford ◽  
Zhiqin Xu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cooling History ◽  
History Of ◽  
Se Tibet ◽  
Tethyan Himalaya

Structural analysis of the foreland basin of the southern Longmenshan tectonic belt: New insights from magnetic fabrics

2021 ◽  
Author(s):  
Yingtao Chen ◽  
Wenxin Yu ◽  
Yang Li ◽  
Guowei Zhang ◽  
Rukui Lu ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Foreland Basin ◽  
Magnetic Fabrics ◽  
Tectonic Belt

scholarly journals Late Triassic successive amalgamation between the South China and North China blocks: Insights from structural analysis and magnetic fabrics study of the Bikou Terrane and its adjacent area, northwestern Yangtze block, central China

2021 ◽  
Author(s):  
Zhenhua Xue ◽  
Wei Lin ◽  
Yang Chu ◽  
Wei Wei ◽  
Zhentian Feng ◽  
...  
Keyword(s):  
Structural Analysis ◽  
South China ◽  
North China ◽  
Late Triassic ◽  
Yangtze Block ◽  
The South ◽  
Structural Geometry ◽  
The North ◽  
Magnetic Fabrics ◽  
Multi Phase

The Bikou Terrane, located at the conjunction of the Longmenshan fold-thrust belt and the west Qinling orogenic belt in centeral China, was involved in the Late Triassic collision between the South China and North China blocks. The Bikou Terrane has preserved crucial information on structural geometry and kinematics of Triassic tectonics, and is therefore of great importance for reconstructing the Paleo-Tethyan evolutionary history. However, multi-phase tectonic events of the Bikou Terrane are unsettled. This work presents detailed structural analysis based on both the field and laboratory works, which reveals three phases of deformation events in Bikou and its adjacent areas, including top-to-the-SW shearing related to SW-ward thrusting (DI) mainly to the north of the Bikou Terrane, top-to-the-NNW shearing related to NNW-ward thrusting (DII) in the Bikou Terrane, and strike-slip faulting (DIII) locally developed in the northern Bikou Terrane. Anisotropy of magnetic susceptibility (AMS) study and related structural analysis not only support the multiphase deformation but also reveal a gradual transition from the DII-related magnetic fabrics to the DIII-related magnetic fabrics in the Bikou Terrane. Integrating published geochronological data, it is constrained that DI occurred at ca. 237−225 Ma, DII occurred at ca. 224−219 Ma, and DIII possibly occurred during the Early Cretaceous. Based on regional tectonics, the DI event corresponds to the collision between the South Qinling block and the Bikou Terrane, and the DII event reflects the intracontinental amalgamation between the Bikou Terrane and the Yangtze block, which indicates a Late Triassic successive amalgamation from the North China block to the South China block. Intracontinental adjustment represented by the strike-slip (DIII event) occurred after the final amalgamation between the North China and South China blocks. By applying AMS on deciphering structural geometry and multi-phase deformation, our study suggests that AMS is a useful tool for structural analysis.

Oligo-Miocene shearing along the Ailao Shan–Red River shear zone: Constraints from structural analysis and zircon U/Pb geochronology of magmatic rocks in the Diancang Shan massif, SE Tibet, China

2011 ◽  
Vol 19 (4) ◽  
pp. 975-993 ◽  
Author(s):  
Shuyun Cao ◽  
Junlai Liu ◽  
Bernd Leiss ◽  
Franz Neubauer ◽  
Johann Genser ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Shear Zone ◽  
Red River ◽  
Magmatic Rocks ◽  
Se Tibet

Triassic sponges (Sphinctozoa) from Hells Canyon, Oregon

1988 ◽  
Vol 62 (03) ◽  
pp. 419-423 ◽  
Author(s):  
Baba Senowbari-Daryan ◽  
George D. Stanley
Keyword(s):  
Endemic Species ◽  
Upper Triassic ◽  
Island Arc ◽  
Tropical Island ◽  
The Family ◽  
Wallowa Terrane ◽  
Unique Condition ◽  
Hells Canyon

Two Upper Triassic sphinctozoan sponges of the family Sebargasiidae were recovered from silicified residues collected in Hells Canyon, Oregon. These sponges areAmblysiphonellacf.A. steinmanni(Haas), known from the Tethys region, andColospongia whalenin. sp., an endemic species. The latter sponge was placed in the superfamily Porata by Seilacher (1962). The presence of well-preserved cribrate plates in this sponge, in addition to pores of the chamber walls, is a unique condition never before reported in any porate sphinctozoans. Aporate counterparts known primarily from the Triassic Alps have similar cribrate plates but lack the pores in the chamber walls. The sponges from Hells Canyon are associated with abundant bivalves and corals of marked Tethyan affinities and come from a displaced terrane known as the Wallowa Terrane. It was a tropical island arc, suspected to have paleogeographic relationships with Wrangellia; however, these sponges have not yet been found in any other Cordilleran terrane.

Structural analysis of the surface-layer protein of spirillum serpens by high-resolution electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 738-739
Author(s):  
W. H. Wu ◽  
R. M. Glaeser
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Structural Analysis ◽  
High Resolution ◽  
Low Dose ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Surface Layer Protein ◽  
Morphological Unit ◽  
Resolution Electron

Spirillum serpens possesses a surface layer protein which exhibits a regular hexagonal packing of the morphological subunits. A morphological model of the structure of the protein has been proposed at a resolution of about 25 Å, in which the morphological unit might be described as having the appearance of a flared-out, hollow cylinder with six ÅspokesÅ at the flared end. In order to understand the detailed association of the macromolecules, it is necessary to do a high resolution structural analysis. Large, single layered arrays of the surface layer protein have been obtained for this purpose by means of extensive heating in high CaCl2, a procedure derived from that of Buckmire and Murray. Low dose, low temperature electron microscopy has been applied to the large arrays.As a first step, the samples were negatively stained with neutralized phosphotungstic acid, and the specimens were imaged at 40,000 magnification by use of a high resolution cold stage on a JE0L 100B. Low dose images were recorded with exposures of 7-9 electrons/Å2. The micrographs obtained (Fig. 1) were examined by use of optical diffraction (Fig. 2) to tell what areas were especially well ordered.

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