Results 11 to 20 of about 1,849,064 (302)

The Skiddaw Group of Cumbria : early Ordovician Turbidite sedimentation and provenance on an evolving microcontinental margin. [PDF]

open access: yes, 1992
During the Early Palaeozoic, the southern British Isles were part of a microcontinent Eastern Avalonia. In the early Ordovician Eastern Avalonia was close to the continent of Gondwana. in high southern latitudes.
Moore, Richard Maurice
core   +7 more sources

Bibliometric analysis of natural lakes and paleolakes origin of natural events [PDF]

open access: yesE3S Web of Conferences
This study explores studies on lakes and paleolakes originating from natural effects. The main objective is to perform a bibliometric analysis of research on naturally occurring lake environments worldwide, covering the period from 2014 to 2024.
Abbach Jamal   +3 more
doaj   +1 more source

A practical approach for discriminating tectonic settings of basaltic rocks using machine learning

open access: yesApplied Computing and Geosciences, 2023
Elucidating the tectonic setting of unknown rock samples has long attracted the interest of not only igneous petrologists but also a wide range of geoscientists.
Kentaro Nakamura
doaj   +1 more source

Detrital zircon record and tectonic setting [PDF]

open access: yes, 2012
Funding: University of St AndrewsDetrital zircon spectra reflect the tectonic setting of the basin in which they are deposited. Convergent plate margins are characterized by a large proportion of zircon ages close to the depositional age of the sediment,
Hawkesworth, Chris   +5 more
core   +1 more source

Geochemical signatures of Lower Gondwana sandstones of eastern Arunachal Himalayas, India: Implications for tectonic setting, provenance and degree of weathering

open access: yesRussian Journal of Earth Sciences, 2020
The compositional variability of the sandstones leads to insight about the controlling sedimentary processes and plate tectonic environments. The geochemical composition of the Lower Gondwana sandstones exposed along the Main Boundary Thrust in parts of ...
Mahanta Bashab N   +4 more
doaj   +1 more source

Petrography and Tectonic Provenance of the Cretaceous Sandstones of the Bredasdorp Basin, off the South Coast of South Africa: Evidence from Framework Grain Modes

open access: yesGeosciences, 2020
The Cretaceous sandstones of the Bredasdorp Basin were investigated to recognize their composition, provenance, and tectonic setting. Ninety-two samples of sandstones from exploration wells E-AH1, E-AJ1, E-BA1, E-BB1, and E-D3 were investigated using ...
Temitope Love Baiyegunhi   +3 more
doaj   +1 more source

Temporal relations between mineral deposits and global tectonic cycles [PDF]

open access: yes, 2013
Natural Environment Research Council (grant NE/J021822/1) supported this research.Mineral deposits are heterogeneously distributed in both space and time, with variations reflecting tectonic setting, evolving environmental conditions, as in the ...
Hawkesworth, Chris   +1 more
core   +1 more source

Tectonic discrimination diagrams revisited [PDF]

open access: yes, 2006
The decision boundaries of most tectonic discrimination diagrams are drawn by eye. Discriminant analysis is a statistically more rigorous way to determine the tectonic affinity of oceanic basalts based on their bulk-rock chemistry.
Vermeesch, P, Pieter Vermeesch
core   +1 more source

Cenozoic Plate Tectonic Reconstructions and Plate Boundary Processes in the Southwest Pacific [PDF]

open access: yes, 2005
The Australia-Pacific-Antarctic plate circuit has long been a weak link in global plate reconstruction models for Cenozoic time. The time period spanning chron 20 to chron 7 (43-25 Ma) is particularly problematic for global plate models because seafloor
Keller, William R.
core   +1 more source

Geochemical characterization of FE-1 well, Onshore Western Niger Delta Basin, Nigeria

open access: yesJournal of Applied Sciences and Environmental Management, 2020
Major oxides and trace elements analysis was carried out on ditch cutting samples of FE-1 well, Onshore, Niger Delta Basin, to define their oxygen condition, paleo-climatic conditions, provenance, tectonic setting, sandstone classification and maturity ...
F.O. Amiewalan, F.A. Lucas
doaj   +1 more source

Home - About - Disclaimer - Privacy