Results 51 to 60 of about 3,960 (136)

Assessing Groundwater Vulnerability to Pollution in a Rapidly Urbanizing River Basin Using a Modified DRASTIC Land Use–Lineament Density Method

open access: yesGeological Journal, Volume 59, Issue 12, Page 3278-3295, December 2024.
The Awash River basin is facing significant groundwater quality challenges. The intrinsic vulnerability of aquifers to pollution is determined by a new method that was developed by adding lineament density (LD) in the DRASTIC model. The highest vulnerability zones increased to 27% with the addition of land use/land‐cover and LD and coincided with ...
Tsnat Tsegay   +4 more
wiley   +1 more source

Discriminating fluid source regions in orogenic gold deposits using B-isotopes [PDF]

open access: yes, 2016
The genesis of orogenic gold deposits is commonly linked to hydrothermal ore fluids derived from metamorphic devolatilization reactions. However, there is considerable debate as to the ultimate source of these fluids and the metals they transport ...
Lambert-Smith, James   +3 more
core   +1 more source

Late Cretaceous and Early Paleogene Fluid Circulation and Microbial Activity in Deep Fracture Networks of the Precambrian Basement of Western Greenland

open access: yesGeochemistry, Geophysics, Geosystems, Volume 25, Issue 9, September 2024.
Abstract Deep fracture‐hosted fluids of Precambrian bedrock cratons are relatively stagnant over long time spans compared to near‐surface systems. However, episodic events, such as fracture reactivations, transgressions, and deglaciations, may introduce dilute water, replacing, and mixing with the deep continental brines, thereby sparking microbial ...
H. Drake   +9 more
wiley   +1 more source

Strain patterns, décollement and incipient sagducted greenstone terrains in the Archaean Dharwar craton (south India) [PDF]

open access: yes, 1996
The Archaean Dharwar craton is characterized by two greenstone successions: the > 3 Ga Sargur Group and the 3.0-2.5 Ga Dharwar Supergroup. Examples of both successions are described from the region of Jayachamarajapura where they are also distinguished ...
Chardon, D.   +2 more
core   +1 more source

Geological factors affecting on after-use of Finnish cut-over peatlands : with implications on the carbon accumulation [PDF]

open access: yes, 2007
In Finland, peat harvesting sites are utilized down almost to the mineral soil. In this situation the properties of mineral subsoil are likely to have considerable influence on the suitability for the various after-use forms.
Picken, Päivi
core  

Tectonic significance of Late Precambrian calc-alkaline and alkaline magmatism in Saint Katherina Area, Southern Sinai, Egypt [PDF]

open access: yes, 2007
Two magmatic rock suites are distinguished in the Late Precambrian basement of the Southern Sinai (NW Arabian-Nubian Shield, Egypt), namely (a) a calc-alkaline suite, and (b) an alkaline suite.
Kamal Azer, Mokhles
core   +3 more sources

Weichselian stratigraphy, geomorphology and glacial dynamics in southern Finnish Lapland [PDF]

open access: yes, 2005
Quaternary stratigraphy and geomorphology were investigated by using aerial photo interpretation, digital elevation models and stratigraphical studies in southern Finnish Lapland.
Pertti Sarala
core   +1 more source

Thorium and Total REE Correlation in Stream Sediment Samples From Lingga Regency [PDF]

open access: yes, 2018
Rare Earth Elements (REE) are found in variety of minerals, which are mobilized by weathering from adjacent watersheds into streambeds and affect the chemical content.
Irzon, R. (Ronaldo)
core   +2 more sources

Microstructures associated with the Sottunga-Jurmo shear zone and their implications for the 1.83–1.79 Ga tectonic development of SW Finland [PDF]

open access: yes, 2010
This petrographic study of rock samples from the area of a large-scale shear zone, the Sottung-Jurmo shear zone, in SW Finland, illuminates the thermal development of and strain distribution within the rocks during the last development stages of the ...
Carl Ehlers, Taija Torvela
core   +1 more source

Late Svecofennian leucogranites of southern Finland : Chronicles of an orogenic collapse [PDF]

open access: yes, 2011
Leucogranite magmatism occurred in southern Finland during the later stages of the Paleoproterozoic Svecofennian orogeny. The leucogranites are considered to have formed from pre-existing crustal rocks that have undergone anatexis in the extensional ...
Kurhila, Matti
core  

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