Results 51 to 60 of about 10,968 (233)

TYPOMORPHIC FEATURES OF MINERALS OF TI ORES FROM THE PIZHEMSKOE DEPOSIT [PDF]

Минералогия, 2016
The technology of production of concentrates of Ti minerals from ores of the Pizhemskoe deposit is improved and includes crushing, mechanical removal of slime films, desliming, gravitation concentration, classification, and magnetic separation.
A.B. Makeev
doaj  

Uralitization – An example from Kuusamo, Finland [PDF]

Bulletin of the Geological Society of Finland, 1977
The course of events as well as the chemical changes associated with the alteration of clinopyroxenes to uralite have been studied from diabases in Kuusamo, Finland.
R. Piispanen, T. Alapieti
doaj   +1 more source

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

(Table 2) Whole-rock geochemical and oxygen isotope analyses of chlorite-amphibole-bearing veins of ODP Site 209-1270

, 2009
(Table 2) Whole-rock geochemical and oxygen isotope analyses of chlorite-amphibole-bearing veins of ODP Site 209 ...
Schroeder, Timothy, Bach, Wolfgang, Wolfgang Bach (6960488), Timothy Schroeder (6965276), Jöns, Niels, Niels Jöns (6960485)   +5 more
core   +1 more source

Garnet-amphibole miaskites of the Ilmenogorsky miaskite massif (Southern Urals): Mineralogy and geochemistry

Литосфера, 2020
Research subject. This paper presents original findings about textural-structural, mineralogical, petrological, and geochemical features of the garnet-amphibole miaskites (firstes) of the Ilmenogorsky miaskite massif.Materials and methods. The microprobe
A. B. Nemov
doaj   +1 more source

Reaction‐Driven Development of Fine‐Grained Plagioclase Networks Influences the Rheology of the Crust in the Bergen Arcs, Norway

Journal of Metamorphic Geology, EarlyView.
ABSTRACT In the middle to lower continental crust, mineral reactions can play a key role in controlling rheological behaviour by generating fine‐grained, mechanically weak domains. In granulite‐facies rocks from Krossøy (Bergen Arcs, Norway), we document how garnet breakdown produced interconnected networks of orthopyroxene + plagioclase ± spinel that ...
Lorena H. Filiberto, Håkon Austrheim, José Alberto Padrón‐Navarta, Andrew Putnis, Christine V. Putnis   +4 more
wiley   +1 more source

Magnitude and symmetry of seismic anisotropy in mica- and amphibole-bearing metamorphic rocks and implications for tectonic interpretation of seismic data from the southeast Tibetan Plateau

, 2015
We calibrated the magnitude and symmetry of seismic anisotropy for 132 mica- or amphibole-bearing metamorphic rocks to constrain their departures from transverse isotropy (TI) which is usually assumed in the interpretation of seismic data.
Shoma Oya, Oya, Shoma, Zhao, Weihua, Weihua Zhao, Matthew H. Salisbury, Salisbury, Matthew H., Takako Satsukawa, Ji, Shaocheng, Wang, Qian, Michibayashi, Katsuyoshi, Katsuyoshi Michibayashi, Tongbin Shao, Shaocheng Ji, Shao, Tongbin, Qian Wang, Satsukawa, Takako   +15 more
core   +1 more source

T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals

Геодинамика и тектонофизика
This paper presents the results of a study of isotopic systems in minerals and rocks in southern margin of the epi-Archean Karelian craton in the zone of its junction with the Svecofennian mobile belt.
Sh. K. Baltybaev, V. M. Savatenkov, M. E. Petrakova   +2 more
doaj   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Fate of Libby Amphibole Fibers When Burning Contaminated Firewood

, 2009
In Libby, Montana, over 70 years of mining amphibole-contaminated vermiculite has led to amphibole contamination in areas surrounding the abandoned mine and in other areas throughout the town.
Meyer, Brienne J., Webber, James S., Spear, Terry M., Hart, Julie Faroni, Ward, Tony   +4 more
core   +1 more source