Results 1 to 10 of about 6,499 (231)

Geochemical dataset of high-pressure acid migmatites from the Cabo Ortegal Complex (NW Spain) [PDF]

open access: yesData in Brief, 2022
This brief note presents geochemical data from rock samples from the Cabo Ortegal Complex (NW Spain). The samples belong to acid lithologies within the mainly basic to intermediate granulite unit that have been poorly investigated so far.
Aratz Beranoaguirre   +5 more
doaj   +2 more sources

Hydrogeochemical characterization and assessment of factors controlling groundwater salinity in the Chamwino granitic complex, central Tanzania [PDF]

open access: yesHeliyon
Chamwino district, central Tanzania is a semi-arid granitic complex province, where groundwater is the major source of water for domestic and other uses. However, groundwater in the area is affected by salinity, thus, lowering the availability of potable
Christina M. Msengi   +3 more
doaj   +2 more sources

Thermal buffering-controlled temperature variation between Mg–Al-rich rocks and migmatites [PDF]

open access: yesScientific Reports
It is well recognised that endothermic processes such as dehydration and partial melting have the potential to exert measurable effects on the maximum temperatures reached in metamorphic rock systems.
Samantha March   +3 more
doaj   +2 more sources

Palaeoproterozoic structural evolution of polyphase migmatites in Olkiluoto, SW Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2022
In migmatitic environments the behaviour of the system is controlled by the generation and amount of the anatectic melt. Accordingly, migmatites typically show a genetic linkage between the tectonic deformation and melt migration. We investigated this
Jon Engström   +3 more
doaj   +1 more source

Timing of syn-orogenic, high-grade transtensional shear zone formation in the West Uusimaa Complex, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2022
We present zircon and titanite U-Pb ages from granulite-facies transtensional shear zones and a greenschist facies strike-slip shear zone in the Karkkila-Vihti area, West Uusimaa. The zircon rim and titanite ages of c.
Taija Torvela, Matti Kurhila
doaj   +1 more source

Genesis and pore development characteristics of Permian Lucaogou migmatites, Jimsar Sag, Junggar Basin

open access: yesShiyou shiyan dizhi, 2022
Taking the influence of lithological characteristics differences on the genesis of pores in migmatite reservoirs as the main line, the genesis and characteristics of pores were analyzed from the perspective of the relationship between rock fabric and ...
Jian WANG   +6 more
doaj   +1 more source

DERIVATIVES AND ANALYTIC SIGNALS: Improved Techniques for Lithostructural Classification. [PDF]

open access: yesMalaysian Journal of Geosciences, 2018
In this study, derivatives and Analytic Signal (AS) techniques were employed to reveal the nature of rocks and lithostructural relationships that exist within the basement complexes around Ekiti and Ondo States.
Akingboye A. Sunny
doaj   +1 more source

PETROGRAPHIC STUDIES AND PHYSICO-MECHANICAL PROPERTIES OF BIRIMIAN GRANITOIDS – A CASE STUDY OF OYOKO GRANITOIDS COMPLEX IN KOFORIDUA [PDF]

open access: yesGeological Behavior, 2022
The study investigated the physico-mechanical and petrographic properties of the basin-type granitoids of the Oyoko granitoid complex, to establish their strengths for engineering properties.
Matthew Coffie Wilson   +4 more
doaj   +1 more source

Study of mineral chemistry, thermobarometry and petrogenesis of migmatitic rocks of Hamedan area [PDF]

open access: yesپترولوژی, 2018
In the Hamedan region, migmatitic rocks occur with various structures. In the Simin area (South Hamedan) stromatic and in the Darreh-Omar (Toyserkan) area ophtalmitic structures are abundant.
Ali Asghar Sepahi Gerow   +3 more
doaj   +1 more source

An example of migmatite origin by dehydrating metamorphism [PDF]

open access: yesBulletin of the Geological Society of Finland, 1979
An unusual type of garnetiferous migmatite has been studied at Tåbor (Moldanubicum of southern Bohemia) characterized by a coarse patchy quartzo-felspathic neosome with conspicuously large garnet crystals and a biotite paragneiss paleosome.
E. Fediuková, M. Suk
doaj   +1 more source

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