Results 21 to 30 of about 35,897 (307)

Neogene polyphase deformation related to the Alboran Basin evolution: new insights for the Beni Bousera massif (Internal Rif, Morocco)

open access: yesBSGF - Earth Sciences Bulletin, 2020
Located in the Internal domain of the Rif belt, the Beni Bousera massif is characterized by a stack of peridotites and crustal metamorphic units. The massif is intruded by granitic dykes and affected by several normal ductile shear zones.
El Bakili Asmae   +6 more
doaj   +1 more source

Evolution of Brittle Structures in Plagioclase‐Rich Rocks at High‐Pressure and High‐Temperature Conditions—Linking Laboratory Results to Field Observations

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Plagioclase‐rich granulites exposed on the Lofoten archipelago, Northern Norway, display strain localization in pseudotachylytes as well as ductile shear zones that formed under similar high‐pressure and high‐temperature conditions.
Sarah Incel   +2 more
doaj   +1 more source

Mode of lithospheric extension: Conceptual models from analogue modeling [PDF]

open access: yes, 2003
International audienceComparison of analogue experiments at crustal and lithospheric scale provides essential information concerning the mode of deformation during lithospheric extension.
Merle, Olivier, Michon, Laurent
core   +3 more sources

Structural control on gold mineralization in the Satulinmäki and Riukka prospects, Häme Schist Belt, southern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2007
The Satulinmäki and Riukka prospects located in the Häme Schist Belt in southern Finland are dominated by mafic and intermediate to felsic metavolcanic rocks of the Forssa Group formed in a continental arc setting.
K. Saalmann
doaj   +1 more source

Transfer zones in Mediterranean back-arc regions and tear faults

open access: yesBSGF - Earth Sciences Bulletin, 2021
Slab tearing induces localized deformations in the overriding plates of subduction zones and transfer zones accommodating differential retreat in back-arc regions.
Jolivet Laurent   +9 more
doaj   +1 more source

Opposing shear senses in a subdetachment mylonite zone: Implications for core complex mechanics [PDF]

open access: yes, 2010
[1] Global studies of metamorphic core complexes and low‐angle detachment faults have highlighted a fundamental problem: Since detachments excise crustal section, the relationship between the mylonitic rocks in their footwalls and the brittle deformation
E. S. Platzman   +8 more
core   +4 more sources

A rate- and state-dependent ductile flow law of polycrystalline halite under large shear strain and implications for transition to brittle deformation [PDF]

open access: yes, 2010
We have conducted double-shear biaxial deformation experiments in layers of NaCl within its fully-plastic (FP) regime up to large shear strains (γ < 50) with velocity steps.
Noda, Hiroyuki, Shimamoto, Toshihiko
core   +1 more source

Deformation sequences and ore-controlling structures of the Chanziping–Daping gold mining area in Hunan Province, China

open access: yesDizhi lixue xuebao, 2023
The Chanziping–Daping gold deposit area is located in the southwest section of the Xuefeng arc-shaped structural belt, with mainly NWW-NNW-trending and secondary NNE-trending Au veins.
BAI Daoyuan   +4 more
doaj   +1 more source

The Rwenzori Mountains, a Paleoproterzoic crustal shear belt crossing the Albertine rift system [PDF]

open access: yes, 2015
This contribution discusses the development of the Paleoproterozoic Buganda-Toro belt in the Rwenzori mountains and its influence on the western part of the East African Rift System in Uganda.
Aanyu, K.   +6 more
core   +1 more source

Simulation of seismic waves at the earth's crust (brittle–ductile transition) based on the Burgers model [PDF]

open access: yesSolid Earth, 2014
The earth's crust presents two dissimilar rheological behaviors depending on the in situ stress-temperature conditions. The upper, cooler part is brittle, while deeper zones are ductile.
J. M. Carcione   +3 more
doaj   +1 more source

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