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One kilometre-thick ultramylonite, Sierra de Quilmes, Sierras Pampeanas, NW Argentina
(Elsevier, 2015-01)
We describe a 1 km-thick ultramylonite forming the high strain base of the >3.5 km-thick El Pichao shear zone in the Sierra de Quilmes. This shear zone thrusted granulite facies migmatites onto amphibolite facies rocks ...
Structure and tectonic significance of high-and low-temperature deformation along the lateral escape-related guaçuí and batatal shear zones, Southern Araçuaí Orogen (Southeastern Brazil)
(2020-10-01)
The Guacuí and Batatal lineaments in the southern region of the state of Es-pírito Santo (southeastern Brazil) can be traced from satellite images for tens of kilometers. They are considered shear zones associated to the ...
Ductile Shear Zones
(Elsevier, 2015)
Mylonite with a big delta mantled porphyroclast of K-feldspar in a matrix of quartz, mica and feldspar. Mylonite is derived from a porphyritic granite characterized by large K-feldspar phenocrysts (up to 20 cm long). ...
A Middle Paleozoic shear zone in the Sierra de Valle Fértil, Argentina: Records of a continent-arc collision in the Famatinian margin of Gondwana
(Elsevier, 2014-09)
Geological, petrological and structural observations were obtained along a 30-km-long traverse across a segment of the Valle Fértil shear zone, central-western Argentina. On a regional scale, the shear zone appears as ...
GOLD IN SERICITE-QUARTZ HYDROTHERMALITES CONTROLED BY BRASILIANO CONJUGATE SHEAR ZONES IN THE CAVALCANTE (GQ) REGION, CENTRAL, BRAZILOURO EM SERICITA-QUARTZO HIDROTERMALITOS CONTROLADOS POR CISALHAMENTOS CONJUGADOS BRASILIANOS, NA REGIÃO DE CAVALCANTE (GO) .BRASIL CENTRAL
(Sociedade Brasileira de Geologia, 2017)
Ouro em sericita-quartzo hidrotermalitos controlados por cisalhamentos conjugados brasilianos, na região de Cavalcante (GO), Brasil centralGold in sericite-quartz hydrothermalites controled by brasiliano conjugate shear zones in the cavalcante (gq) region, central, Brazil
(Universidade Federal do Paraná - Pró-reitoria de pesquisa e pós-graduação, 2012)
The ≥6-km Cuesta de Randolfo mylonite zone in Ordovician Famatinian peraluminous granites, NW Argentina: Strain-localization as a function of protolith composition
(Pergamon-Elsevier Science Ltd, 2021-12)
The Cuesta de Randolfo mylonite zone (CRMZ) in the southern Puna of Argentina comprises ≥6-km of moderately to steeply dipping proto-to ultramylonites developed in peraluminous intrusive rocks of the Famatinian arc. From ...
Development of a self-similar strike-slip duplex system in the Atacama Fault system, Chile
(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
Fault development models are crucial to predict geometry and distribution of fractures at all scales. We present here structures related to the development of the Bolfin Fault in the Atacama Fault System (AFS), covering a ...
Tectonic evolution of the western margin of Gondwana inferred from syntectonic emplacement of Paleozoic granitoid plutons in northwest Argentina
(University of Chicago Press, 2007-03)
The Cerro Durazno, Brealito, and Cobres granitoid plutons belong to the eastern Ordovician magmatic belt of northwestArgentina and are associated with a network of NW- and N-striking ductile shear zones. A structural ...
The geology and ore deposits of the Quiruvilca district, Peru
(Society of Economic GeologistsUS, 1956-01)
The Quiruvilca copper-lead-zinc district is in the Department of La Libertad in north-central Peru. The only large mine in this area is the Quiruvilca mine, owned and operated by the Northern Peru Mining and Smelting Co. ...