Results 31 to 40 of about 3,101 (168)

Water on Mars, With a Grain of Salt: Local Heat Anomalies Are Required for Basal Melting of Ice at the South Pole Today

open access: yesGeophysical Research Letters, 2019
Recent analysis of radar data from the Mars Express spacecraft has interpreted bright subsurface radar reflections as indicators of local liquid water at the base of the south polar layered deposits (SPLD). However, the physical and geological conditions
Michael M. Sori, Ali M. Bramson
doaj   +1 more source

Mafic-silicic magma interaction in the layered 1.87 Ga Soukkio Complex in Mäntsälä, southern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
The Svecofennian layered Soukkio Complex (1.87 Ga) in Mäntsälä, southern Finland, consists of layered tholeiitic gabbro and porphyritic calc-alkaline monzonite, quartz monzonite and granite, mingled together.
T.T. Eerola
doaj   +1 more source

Magmatism and tectonic evolution of West Antarctica

open access: yesDizhi lixue xuebao, 2021
West Antarctica is mainly composed of five distinct micro-continental blocks, namely Haag Nunataks, Antarctic Peninsula, Thurston Island, Marie Byrd Land and Ellsworth-Whitmore Mountains. In order to understand the geological evolution of West Antarctica,
ZHENG Guanggao   +3 more
doaj   +1 more source

The origin, conditions and mechanism for the formation of alpine-type hyperbasites of the Lesser Caucasus

open access: yesМінеральні ресурси України, 2023
The problem of hyperbasites origin is one of the widely discussed topics in geology. This is because they often appear when no expected. Their development does not correspond to the general regularities of the geological complexes’ development. Therefore,
Z. B. Abdullayev   +3 more
doaj   +1 more source

Ore forming process of magmatic nickel-copper-cobalt sulfide deposits in China

open access: yesFundamental Research
The magmatic Ni-Cu-Co deposits are the main source of critical mineral resources in China, such as nickel, cobalt, and platinum group elements, which are formed generally in a continental rift setting or gravitational collapse at the end of an orogeny ...
Wenyuan Li, Yongbao Gao, Leon Bagas
doaj   +1 more source

Magmatism in the Netherlands: expression of the northwest European rifting history [PDF]

open access: yes
The presence of igneous rocks in about 100 wells drilled for hydrocarbons, mainly concentrated in the eastern provinces of the Netherlands, the western onshore and offshore areas and in the northern offshore testify to the significance of magmatic activity in the geological history of the Netherlands. Intrusive rocks, mainly emplaced into Carboniferous
Bergen, M.J. van   +4 more
openaire   +4 more sources

To the problem of origin volcanoplutonic processes

open access: yesМінеральні ресурси України
In the article from the position on the Concept of the Dynamics of the Earth’s Crust Evolution (CDECE) the problems of the origin of volcanoplutonic processes and related endogenous ore formation are considered.
A. T. Akhverdiev
doaj   +1 more source

Çayeli (Rize) ve İspir (Erzurum) arasında kalan alanın tektonostratigrafik özellikleri

open access: yesBulletin of the Mineral Research and Exploration, 2019
İnceleme alanı Doğu Pontidler’de Rize, Çayeli, Arhavi, İspir İkizdere arasında kalan alanı kapsamaktadır. Bu alanda Maçka Tektonik Dilimi (MTD) ve Taşköprü Tektonik Dilimi (TTD) yüzeylenmektedir. MTD yaşlıdan gence doğru; Geç Jura-Erken Kretase kireçtaşı
İsmet ALAN   +10 more
doaj   +1 more source

Infinite magmatic bialgebras

open access: yesAdvances in Applied Mathematics, 2008
An infinite magmatic bialgebra is a vector space endowed with an n-ary operation, and an n-ary cooperation, for each n, verifying some compatibility relations. We prove a rigidity theorem, analogue to the Hopf-Borel theorem for commutative bialgebras: any connected infinite magmatic bialgebra is of the form $Mag^\infty(Prim H)$, where $Mag^\infty(V ...
openaire   +3 more sources

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