Results 61 to 70 of about 388,584 (268)
Accretionary Tectonics of the North American Cordillera [PDF]
, 1983 Continental geology stands on the threshold of a change that is likely to be as fundamental as plate-tectonic theory was for marine geology. Ongoing seismic-reflection investigations into the deep crustal structure of North America are verifying that ...
Saleeby, Jason B.
core +2 more sources
Terra Nova, EarlyView.ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito +4 more
wiley +1 more source
The Cogne magnetite deposit (Western Alps, Italy): a Jurassic seafloor ultramafic-hosted hydrothermal system? [PDF]
, 2017 The Cogne magnetite deposit (Western Alps, Italy) is the largest in a series of apatite and sulphide-free magnetite orebodies that are hosted in serpentinites belonging to western Alpine ophiolitic units.
Toffolo, Luca
core +1 more source
Origin of magnetic fabrics in ultramafic rocks [PDF]
IOP Conference Series: Materials Science and Engineering, 2015 IOP Conference Series: Materials Science and Engineering, 82 (1)
Biedermann A.R. +3 more
openaire +3 more sources
, 2017 Serpentinites and fresh or partially serpentinized harzburgite crop out in the western slope of the North Patagonian Andes of continental Chiloe (41°44’-42°12’S).
F. Hervé +6 more
semanticscholar +1 more source
A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]
, 2011 The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Amaral +25 more
core +3 more sources
Phase Equilibria Modeling of Low-Grade Metamorphic Martian Rocks [PDF]
, 2018 We report on modeling low-grade (up to 300 °C) metamorphic reactions with Martian starting ...
Schwenzer, S. P. +2 more
core
AGRIVITA Journal of Agricultural Science, 2011 Oil palm plantation in Langgikima was mostly grown in soils derived from ultramfic rocks which contain low productivity. Therefore, a study was required to determine the charac-teristics of soils evolved from ultramafic rocks evaluated from the aspects ...
M. Tufaila +3 more
doaj
Литосфера, 2017 In the article is presented data of mineralogy, petrography, geochemistry and isotope-geochronology study Nyashevo mafic-ultramafic massif in Ilmeny-Vishnevogorsk polymethamorphic shear zone. The ultramafic rocks consist of serpentine and chlorite (up to
Natal’ya M. Valizer +3 more
doaj +2 more sources
Sea-floor tectonics and submarine hydrothermal systems [PDF]
, 2005 The discovery of metal-depositing hot springs on the sea floor, and especially their link to chemosynthetic life, was among the most compelling and significant scientific advances of the twentieth century. More than 300 sites of hydrothermal activity and
de Ronde, Cornell D. J. +2 more
core +1 more source