Results 21 to 30 of about 409 (184)

Metasedimentary Metatexites with Trondhjemitic Leucosomes from NE Sicily: Another Example of Prograde Water-fluxed Melting in Collisional Belts

open access: yesGeosciences, 2020
Trondhjemitic leucosomes, hosted in late Variscan metasedimentary migmatites from the upper amphibolite-facies basement of the north-eastern Peloritani Mountains (southern Italy), have petrographic and geochemical features consistent with their origin as
Patrizia Fiannacca, Rosolino Cirrincione
doaj   +1 more source

Evaluation of Physical Characteristics of Soils Derived from Basement Complex Rocks of the Jos Plateau

open access: yesUMYU Scientifica Journal, 2022
The physical characteristics of soils to a large extent influences soil productivity. The objective of this study therefore is to evaluate the physical characteristics of soils derived from basement complex rocks of the Jos Plateau.
Ayodele Owonubi
doaj   +1 more source

Melt inclusions in migmatites and granulites [PDF]

open access: yesJournal of the Virtual Explorer, 2011
Important advances have been made during the last 15 years in the study of melt inclusions in minerals from migmatites and granulites. Pioneer work on high temperature metapelitic anatectic enclaves in peraluminous dacites from SE Spain has shown that droplets of granitic melt can be trapped by minerals growing during incongruent melting reactions, and
CESARE, BERNARDO   +3 more
openaire   +2 more sources

Comparison of oil-bearing properties and oil mobility of shale with different lithologies in continental basins: a case study of the upper fourth member of Paleogene Shahejie Formation in Dongying Sag, Bohai Bay Basin

open access: yesShiyou shiyan dizhi, 2020
The shale in the upper part of the 4th member of Paleogene Shahejie Formation in the Dongying Sag of Bohai Bay Basin can be divided into two lithology types: calcareous mudstone and argillaceous limestone. The differences of organic matter abundance, oil-
Zheng LI
doaj   +1 more source

Analysis of polar compounds in biodegraded heavy oil by negative ion electrospray Fourier transform ion cyclotron resonance mass spectrometry

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 ...
Erting LI   +7 more
doaj   +1 more source

Double Power-Law in Leucosome Width Distribution: Implications for Recognizing Melt Movement in Migmatites

open access: yesFrontiers in Earth Science, 2020
Leucosome sizes in migmatites has been shown to follow power-law distribution, which is indicative of self-organized criticality governing accumulation and transport of partial melts in anatexis.
Anna Saukko   +4 more
doaj   +1 more source

Petrology, geochemistry, and geochronology of the leucogranites in southernmost Finland [PDF]

open access: yesBulletin of the Geological Society of Finland
In the southernmost part of the Svecofennian province in Finland, leucogranites and migmatites stemming from both igneous and sedimentary protoliths reflect the complex magmatic history of the Svecofennian orogeny between 1.89 and 1.82 Ga.
Anna Saukko   +4 more
doaj   +1 more source

Remarks about the tectonics of the gneisses of central Baffin Island and the rise of the infrastructure [PDF]

open access: yesBulletin of the Geological Society of Finland, 1972
In this paper some parallels are drawn between gneiss-tectonics of central Baffin Island and some similar localities elsewhere, and some general principles of migmatite tectonics are discussed.
E.H. Kranck
doaj   +1 more source

Basement rocks around the eastern sector of Baranis-Aswan Road, Egypt: Remote sensing data analysis and petrology

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2022
The basement rocks around Baranis-Aswan Road, South Eastern Desert of Egypt encompasses a variety of the oldest Pan-African rock units including medium-grade hornblende schist, a variety of gneisses and migmatite as well as medium- to low-grade ...
Mohamed W. Ali-Bik   +2 more
doaj   +1 more source

Th–U–total Pb monazite geochronology records Ordovician (444 Ma) metamorphism/partial melting and Silurian (419 Ma) thrusting in the Kåfjord Nappe, Norwegian Arctic Caledonides

open access: yesGeologica Carpathica, 2019
The northern extent of the Scandinavian Caledonides includes the Skibotn Nappe Complex of still debated structural position. This paper is focused on part of this complex and presents new U–Th–total Pb monazite dating results for the migmatitic gneiss of
Ziemniak Grzegorz   +6 more
doaj   +1 more source

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