Results 11 to 20 of about 7,625 (261)

Heterogeneity of alkaline lacustrine source rocks of the lower Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, northwestern China

open access: yesEnergy Exploration & Exploitation, 2023
The alkaline lacustrine source rocks in the lower Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China, exhibit significant heterogeneity. However, most previous studies have focused on the vertical variability of the source rocks, and the ...
Baoli Xiang   +3 more
doaj   +1 more source

Relationship of ore properties and alteration of the Büyük Kuluncak (Malatya) Nb - U - NTE - Zr - Li deposit

open access: yesBulletin of the Mineral Research and Exploration, 2022
Rare Earth Elements (REE) + Niobium (Nb) + Uranium (U) + Zircon (Zr) + Lithium (Li) formations are investigated which are related with alkaline Upper Cretaceous - Lower Paleocene Kuluncak Syenitoid that settled by cutting the Kuluncak ophiolite in the ...
Okan Pulat   +2 more
doaj   +1 more source

The Encantada Granite: registration of a peraluminous intrusion in the Rondonian Province - San Ignacio, in SW Amazonic Craton, Mato Grosso, Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2015
The Encantada Granite occurs on the extreme southwest of the state of Mato Grosso, SW of the Amazonian Craton, near the border of Brasil/Bolívia. It corresponds to an body oriented to NNW direction that intruded metasedimentary and metavolcanic rocks ...
Brena Verginassi do Nascimento   +2 more
doaj   +1 more source

Alkali magmatism on Mars: an unexpected diversity

open access: yesComptes Rendus. Géoscience, 2021
Despite an apparent north/south topographic dichotomy that formed ${>}$4.0 Ga, the young Martian meteorites (${
Sautter, Violaine, Payre, Valerie
doaj   +1 more source

Magmatism of northwest of Takestan: The product of asymmetric caldera collapse [PDF]

open access: yesپترولوژی, 2022
One of the main products of caldera collapses is ignimbrite, and there is a direct relationship between the volume of ignimbrite and caldera dimensions.
Batool Nemati   +2 more
doaj   +1 more source

RARE EARTH MINERALS IN ALKALINE AND SUBALKALINE ROCKS OF THE BALBUK COMPLEX (SOUTH URALS) [PDF]

open access: yesМинералогия, 2016
Mineral composition of alkaline and subalkaline rocks of the Balbuk complex (South Urals) is characterized. The major REE minerals are monazite-(Ce), allanite-(Ce), and rhabdophane-(Ce).
E.P. Makagonov, V.A. Kotlyarov
doaj  

Distribution characteristics of organic matter in the Fengcheng Formation in Mahu Sag, Junggar Basin: implications for hydrocarbon generation model in alkaline lacustrine deposition

open access: yesFrontiers in Earth Science, 2023
Alkaline lacustrine deposits are known for their high primary productivity, unique aquatic environments, and sedimentary patterns, which are conducive to the formation and preservation of organic matter.
Minjie Ni   +3 more
doaj   +1 more source

Petrochemical characteristics of late Paleozoic magmatic rocks of the Mandakh area, southeast Mongolia

open access: yesMongolian Geoscientist, 2018
The late Paleozoic magmatic rocks are widely distributed in the Mandakh area which is located in the Gurvansaikhan and Manlai terrains, where porphyry Cu deposits occur.
Undarmaa Batsaikhan   +3 more
doaj   +1 more source

Significance of the study of sedimental rock-forming evolution in the Earth history for the reconstruction of the changes of geochemical settings on its surface

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
The distribution in the geological section of two groups of sedimentary rocks, siliceous and carbonate rocks of different composition — has been examined.
V. G. Kuznetsov
doaj   +1 more source

Sulphur isotopes of alkaline magmas unlock long-term records of crustal recycling on Earth

open access: yesNature Communications, 2019
Sulphur isotopes track recycling of subducted crustal material, yet few igneous rocks preserve these signals over Earth history. Here, the authors investigate a billion-year-old alkaline province in Greenland and are able to reconstruct a recycled mantle
William Hutchison   +9 more
doaj   +1 more source

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