Results 131 to 140 of about 153,773 (348)

Paleoproterozoic Reworking of Archean Crust and Extreme Back‐Arc Metamorphism in the Enigmatic Southern Trans‐Hudson Orogen

open access: yesGeophysical Research Letters
The crustal evolution of the southernmost ∼2000–1800 Ma Trans‐Hudson orogen (THO) is enigmatic due to burial by Phanerozoic sediments. We provide new insights through petrochronologic analysis of a paragneiss drill core sample.
Ian W. Hillenbrand   +6 more
doaj   +1 more source

Regular dependence of acoustic signals from dispersion at jet grinding ores [PDF]

open access: yes, 2013
В умовах роботи струминних подрібнювальних установок виявлено акустичні закономірності зміни дисперсності матеріалів у процесі тонкого подрібнення. Запропоновано комплексні акустичні й технологічні критерії підвищення якості подрібненого продукту при ...
Gorobets, L.J.   +2 more
core  

Recuperación de sílice residual de columnas de cromatografía en la síntesis sol-gel de pigmentos

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2000
The use of a silica waste of support chromatography process as raw material in the synthesis of ceramic pigments based in zircon network (yellow of praseodymium, turkish blue of vanadium and pink koral of iron), is analized in this study.
Grañana, M. C.   +4 more
doaj  

CRYSP: construction and visualization of crystal shapes in natural habits and on planar substrates. [PDF]

open access: yesActa Crystallogr B Struct Sci Cryst Eng Mater
CRYSP is a software tool for the construction and visualization of crystal shapes in both natural habits and on planar substrates. It also supports morphologies associated with non‐crystallographic point groups.CRYSP has been developed as a crystallographic tool for the construction and visualization of crystal shapes. The input parameters for software
Li XZ.
europepmc   +2 more sources

SHRIMP U-Pb Geochronology of the Socorro Batholith and implications for the Neoproterozoic evolution in SE Brazil

open access: yesBrazilian Journal of Geology
: The Socorro Batholith is one of the most expressive granite manifestations associated with the Neoproterozoic evolution in SE Brazil, occupying large areas (~1,200 km 2 ) in the southern portion of the Socorro-Guaxupé Nappe.
Bárbara Bueno Toledo   +2 more
doaj   +1 more source

BADDELEYITE MINERALIZATION OF ULTRAMAFIC ROCKS FROM THE MAIN URALS COLLISIONAL SUTURE (UFALEY METAMORPHIC BLOCK, CENTRAL URALS) [PDF]

open access: yesМинералогия, 2016
Baddeleyite from ultramafic rocks of the Kurta eclogite-schist megamélange (Ufaley metamorphic block, Central Urals) is studied. The zirconium mineralization is established in Ni-bearing forsterite and magnetite-forsterite rocks, which were replaced by ...
A.I. Belkovsky, A.R. Nesterov
doaj  

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