Results 21 to 30 of about 315,004 (173)

Transition from contractional to transpressive tectonics: evidence from the Feira Nova Region, Rio Capibaribe Domain, Borborema Province, NE Brazil

open access: yesBrazilian Journal of Geology, 2021
Differences in tectonic style and kinematics in orogenic belts can result from either multiphase or progressive deformation. In eastern Borborema Province, a regional shallow dipping foliation is multiply folded and crosscut by transcurrent shear zones ...
Valdielly Larisse Silva   +1 more
doaj   +1 more source

Tectonics and mineralization in Sri Lanka [PDF]

open access: yesBulletin of the Geological Society of Finland, 1985
Over nine-tenths of Sri Lanka is underlain by Precambrian metasedimentary rocks, granitic gneisses and migmatites. The Highland Series (granulite facies), made up of typical metasedimentary rocks ‒ quartzites, marble, white granulites and granulitic ...
P.W. Vitanage
doaj   +1 more source

Deciphering the geochemistry of two key Paleoproterozoic siliciclastic sequences of the Piedra Alta Terrane (Río de la Plata Craton, Uruguay)

open access: yesAgrociencia Uruguay, 2022
The geochemistry of two metavolcano-sedimentary sequences deposited in the Piedra Alta Terrane is compared, and their geotectonic evolution is discussed.
Gonzalo Blanco   +7 more
doaj   +1 more source

Parameterization and quantification of recharge in crystalline fractured bedrocks in Galicia-Costa (NW Spain) [PDF]

open access: yesHydrology and Earth System Sciences, 2012
Quantifying groundwater recharge in crystalline rocks presents great difficulties due to the high heterogeneity of the underground medium (mainly, due to heterogeneity in fracture network, which determines hydraulic parameters of the bedrock like ...
J. R. Raposo, J. Molinero, J. Dafonte
doaj   +1 more source

PETROGRAPHY AND GEOCHEMISTRY OF METASEDIMENTS FROM BUGAJI, PART OF MALUMFASHI SHEET 79 NE, KANO STATE, NORTHWESTERN NIGERIA [PDF]

open access: yesGeological Behavior, 2023
This research is aimed at determining the protolith of metasediments that underpin the geology of Bugaji region of Kano State. The study area was mapped systematically and the lithologies encountered include phyllite, undifferentiated schist, quartzo ...
Abdullah Musa Ali   +1 more
doaj   +1 more source

The Changing Character of Carbon in Fluids with Pressure

open access: yesGeophysical Monograph Series, Page 259-269., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Dimitri Sverjensky   +2 more
wiley  

+1 more source

Stratigraphy of the central parts of the Palaeoproterozoic Tampere Schist Belt, southern Finland: review and revision [PDF]

open access: yesBulletin of the Geological Society of Finland, 1998
The arc-type Palaeoproterozoic volcanic-sedimentary Tampere Schist Belt (TSB), close to the centre of the Svecofennian Orogen, comprises an E-W-striking major synform in its central parts.
Y. Kähkönen
doaj   +1 more source

Geology and Lithogeochemistry of the Supracrustal Sequence and Interlayered Metabasites of NE Santos Dumont Region (MG) [PDF]

open access: yesAnuário do Instituto de Geociências, 2017
The region near Santos Dumont town consists of a sequence of interlayered metabasic rocks and supracrustal gneisses. Two lithological units were individualized based on geological-structural mapping (1:50,000), petrography and lithogeochemistry: a ...
Renata Hiraga   +5 more
doaj   +1 more source

Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: Zircon geochronology from the Kangaatsiaq–Qasigiannguit region, the northern part of the 1.9–1.8 Ga Nagssugtoqidian orogen, West Greenland [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2006
The Kangaatsiaq–Qasigiannguit region in the northern part of the Palaeoproterozoic Nagssugtoqidian orogen of West Greenland consists of poly-deformed orthogneisses and minor occurrences of interleaved, discontinuous supracrustal belts. Laser ablation ICP-
Conelly, James N., Thrane, Kristine
doaj  

Review on Rock Aquifers Researches Conducted in Malaysia

open access: yesMATEC Web of Conferences, 2018
The exploration of groundwater in Malaysia was not very welcomed due to few misconceptions such as it is very expensive to extract, could give negative impacts to the environment and not reliable.
Rathinasamy Vynotdni   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy