Geochronology of shear zones – A review
Sign Up to like & getrecommendations! Published in 2018 at "Earth-Science Reviews"
DOI: 10.1016/j.earscirev.2018.07.007
Abstract: Abstract Shear zones play a major role in the deformation of the crust at a variety of scales, as expressions of strain localization during orogeny and rifting, and also as reactivated structures. They influence the… read more here.
Keywords: shear zone; deformation; shear zones; zones review ... See more keywords
Fault spacing in continental strike-slip shear zones
Sign Up to like & getrecommendations! Published in 2020 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.115906
Abstract: Abstract Strike-slip shear zones with sub-parallel arrays of evenly-spaced faults are widely observed in nature, but the controls on the spacing between major faults are unclear. We analyze a 2-D model and develop a scaling… read more here.
Keywords: fault; strike slip; fault spacing; layer ... See more keywords
Rotation, narrowing, and preferential reactivation of brittle structures during oblique rifting
Sign Up to like & getrecommendations! Published in 2020 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.115952
Abstract: Abstract Occurrence of multiple faults populations with contrasting orientations in oblique continental rifts and passive margins has long sparked debate about relative timing of deformation events and tectonic interpretations. Here, we use high-resolution three-dimensional thermo-mechanical… read more here.
Keywords: phase; oblique rifting; deformation; rotation ... See more keywords
Geology of the world-class Kiaka polyphase gold deposit, West African Craton, Burkina Faso
Sign Up to like & getrecommendations! Published in 2017 at "Journal of African Earth Sciences"
DOI: 10.1016/j.jafrearsci.2016.11.017
Abstract: The Kiaka gold deposit is a major resource in West Africa, with measured and indicated resources of 124 Mt at 1.09 g/t Au (3.9 Moz) and inferred resources of 27 Mt at 0.83 g/t Au… read more here.
Keywords: gold deposit; geology; shear zones; gold ... See more keywords
Synkinematic interplay between felsic dykes and host rock mylonitization: how magmatism assists the formation of ductile narrow shear zones in the Sierra Chica de Córdoba, Argentina
Sign Up to like & getrecommendations! Published in 2020 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2020.103063
Abstract: Abstract This study provides new insights about mechanisms of synkinematic interplay between dyking emplacement and ductile narrow shear zones formation in the Sierra Chica de Cordoba. A detailed analysis of structural, microstructural, geometric-scaling and geochronologic… read more here.
Keywords: magmatism; synkinematic interplay; formation; shear zones ... See more keywords
Lattice-preferred orientation development in experimental and natural fine-grained dolomite shear zones
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Structural Geology"
DOI: 10.1016/j.jsg.2019.103874
Abstract: Abstract We compare microstructures and lattice preferred orientations (LPO) in shear zones formed in two experimentally deformed and two naturally deformed dolomites. Experimental samples were deformed at 900 °C and laboratory strain rates, and naturally deformed… read more here.
Keywords: dolomite shear; deformed dolomites; lattice preferred; grained dolomite ... See more keywords
Structural and kinematic evolution of strike-slip shear zones around and in the Central Tianshan: Insights for eastward tectonic wedging in the southwest Central Asian Orogenic Belt
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Structural Geology"
DOI: 10.1016/j.jsg.2021.104279
Abstract: In order to better understand the late Paleozoic tectonic evolution of the southwestern Central Asian Orogenic Belt (CAOB), we carried out structural and geochronological studies on the poorly investigated Xiaergou and Wulasitai shear zones around… read more here.
Keywords: central asian; central tianshan; asian orogenic; tianshan ... See more keywords
Using apatite to resolve the age and protoliths of mid-crustal shear zones: A case study from the Taxaquara Shear Zone, SE Brazil
Sign Up to like & getrecommendations! Published in 2020 at "Lithos"
DOI: 10.1016/j.lithos.2020.105817
Abstract: Abstract Shear zones accommodate strain and facilitate migration of hydrothermal fluid and magma through the crust. Unravelling the deformation history of shear zones requires correspondence between the closure temperature of mineral geochronometers and the temperature… read more here.
Keywords: protoliths mid; shear zone; shear zones; crustal shear ... See more keywords
Supergene modification of magnetite and hematite shear zones in banded iron-formation at Mt Richardson, Yilgarn Craton, Western Australia
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DOI: 10.1016/j.oregeorev.2019.102995
Abstract: Abstract The Mt Richardson deposit contains high-grade (>57 wt% Fetotal) iron ore zones hosted by several banded iron-formations (BIFs) in the c. 3504 Ma Illaara greenstone belt. The BIFs and intervening mafic igneous rocks are exposed along… read more here.
Keywords: magnetite hematite; richardson; quartz; shear zones ... See more keywords
Transient weakening during the granulite to eclogite transformation within hydrous shear zones (Holsnøy, Norway)
Sign Up to like & getrecommendations! Published in 2021 at "Tectonophysics"
DOI: 10.1016/j.tecto.2021.229026
Abstract: In Holsnoy (Bergen Arcs, Norway), metastable granulite facies anorthosite rocks are partially eclogitised within hydrous shear zones, that have been interpreted as widening over time with fluid influx and strain. We here present a detailed… read more here.
Keywords: hydrous shear; transient weakening; assemblage; within hydrous ... See more keywords
Slow-to-fast transition of giant creeping rockslides modulated by undrained loading in basal shear zones
Sign Up to like & getrecommendations! Published in 2020 at "Nature Communications"
DOI: 10.1038/s41467-020-15093-3
Abstract: Giant rockslides are widespread and sensitive to hydrological forcing, especially in climate change scenarios. They creep slowly for centuries and then can fail catastrophically posing major threats to society. However, the mechanisms regulating the slow-to-fast… read more here.
Keywords: giant rockslides; fast transition; shear zones; slow fast ... See more keywords