Results 11 to 20 of about 6,037 (231)

Cryptic Disc Structures Resembling Ediacaran Discoidal Fossils from the Lower Silurian Hellefjord Schist, Arctic Norway. [PDF]

open access: yesPLoS ONE, 2016
The Hellefjord Schist, a volcaniclastic psammite-pelite formation in the Caledonides of Arctic Norway contains discoidal impressions and apparent tube casts that share morphological and taphonomic similarities to Neoproterozoic stem-holdfast forms.
Christopher L Kirkland   +3 more
doaj   +2 more sources

Lawsonite and Garnet Oxygen Isotope Record of Fluid‐Rock Interaction During Subduction

open access: yesGeochemistry, Geophysics, Geosystems
During the subduction of an oceanic plate, fluids are released from metabasaltic crust, metasediment, and serpentinite under high‐pressure/low‐temperature conditions.
Patricia Kang   +3 more
doaj   +2 more sources

Hybridization Melting Between Continent‐Derived Sediment and Depleted Peridotite in Subduction Zones

open access: yes, 2018
To better constrain the processes by which subducted continent-derived sediment and the overlying mantle wedge react to produce hybrid magmas, we have performed a series of high-pressure interaction experiments involving a phyllitic metasediment and a ...
Foley, Stephen F.   +3 more
core   +2 more sources

Nanggulan formation as a roof pendant at the central part of Kulon Progo Mountains, Yogyakarta, Indonesia [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2022
The Nanggulan Formation sediments form a weakly undulating hill and range in age from the Middle Eocene to the Late Oligocene. In Samigaluh and Sermo areas, a series of sedimentary rocks with small dimensions resembling fragments and forming a steep ...
Winarti   +2 more
doaj   +1 more source

Implication of geological domains data for modeling and estimating resources from Nkout iron deposit (South-Cameroun) [PDF]

open access: yesJournal of Mining and Metallurgy. Section A: Mining, 2021
This paper is devoted to determining whether the addition of geological information can improve the resource estimate of mineral resources. The geochemical data used come from 116 drill holes in the Nkout East iron deposit in southern Cameroon.
Boroh A.W.   +4 more
doaj   +1 more source

REE patterns for apatites from Proterozoic phosphatic metasediments, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1983
Several occurrences of uranium- and apatite-bearing metasediments are known in the Precambrian of Finland. The characteristic rock types in the occurrences: metaphosphorite, apatite-bearing carbonate and calc-silicate rocks and apatite-quartz-feldspar ...
P. Rehtijärvi
doaj   +1 more source

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+1 more source

Petrology and tectono-magmatic setting of Zorrati granitoid, southwest of Birjand (East of Lut block) [PDF]

open access: yesپترولوژی, 2023
The Zorrati granitoid (ZG) pluton exposed on the eastern edge of the Lut block trending north-south. The Lut block surrounded in the north by the Darone fault, in the south by the Jazmurian fault and in the east and  the  west by Nahbandan and Naiband ...
Ebadolah Toulabi Nejad   +4 more
doaj   +1 more source

ANALISIS TENSOR FASE DAN PEMODELAN 2D DATA MAGNETOTELURIK GABBS VALLEY, NEVADA, USA

open access: yesJGE, 2023
Metode magnetotellurik (MT) merupakan salah satu teknik dalam metode geofisika yang menggunakan sumber alami dalam bentuk medan elektromagnetik yang berasal dari medan listrik dan variasi medan magnet di bumi.
Pahri Pahri   +2 more
doaj   +1 more source

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