Results 81 to 90 of about 197,145 (380)

Northwest Africa 5790. Top Sequence of the Nakhlite Pile [PDF]

open access: yes, 2010
NWA 5790 is a recently discovered nakhlite. Its mineralogy, petrology and geochemistry suggest that it is the topmost sequence of the nakhlite lava ...
Badia, D.   +7 more
core  

Mafic alkaline metasomatism in the lithosphere underneath East Serbia: evidence from the study of xenoliths and the host alkali basalts [PDF]

open access: yes, 2010
Effects of mafic alkaline metasomatism have been investigated by a combined study of the East Serbian mantle xenoliths and their host alkaline rocks.
Cvetkovic, V.   +4 more
core   +1 more source

Dynamic Copper(I) and Silver(I) Complexes of Tri‐tert‐butyl‐cyclotriphosphane

open access: yesChemistry – A European Journal, Accepted Article.
The reaction of cyclo‐(P3tBu3) with CuI and AgI salts led to the di‐ and tetranuclear complexes [Cun(μ‐Br)n{μ‐cyclo‐(P3tBu3)‐κP1,κP2}2] with n = 2 (1) and n = 4 (2) and [Agn(OTf)n(CH3CN)n–2{μ‐cyclo‐(P3tBu3)‐κP1,κP2}2] with n = 2 (4) and n = 4 (5). Complexes 1, 2, 4 and 5 were isolated as crystalline powders or single crystals and characterised by X‐ray
Toni Grell   +4 more
wiley   +1 more source

MICROTOPOCHEMISTRY OF MARCASITE-PYRITE NODULE IN ILLITE-HEMATITE GOSSANITES OF THE LAHANOS MASSIVE SULFIDE DEPOSIT (PONTIDES, TURKEY): LA-IСP-MS DATA [PDF]

open access: yesМинералогия, 2017
In addition to black shales, the sulfide nodules can occur in red-colored aposulfide deposits, e.g., illite-hematite gossanites of the Lahanos massive sulfide deposit (Pontides, Turkey), where the marcasite-pyrite nodules are located at the base of the ...
V.V. Maslennikov   +3 more
doaj  

Experimental study of laboratory-heated CM2 chondrites Mighei and Murchison [PDF]

open access: yes, 2006
We conducted experimental heating of two CM2 chondrites, Murchison and Mighei, to study changes in their oxygen isotopic compositions and mineralogy and explore possible genetic relationships between MCCs and normal ...
Baker, L.   +7 more
core  

Evaluating the feasibility of using a rapeseed oil‐derived anionic polymeric surfactant for enhanced oil recovery from carbonate/sandstone composite reservoirs

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
The experimental procedure for evaluating the rapeseed oil‐based polymeric surfactant in enhanced oil recovery. Abstract This study aims to investigate enhanced oil recovery from carbonate/sandstone composite (CSC) reservoirs using a negative‐charged rapeseed oil‐based polymeric surfactant.
Iman Nowrouzi   +2 more
wiley   +1 more source

ZIRCONOLITE OF ALKALINE PEGMATITES OF THE VISHNEVYE MOUNTAINS: THE FIRST FINDINGS IN THE SOUTH URALS [PDF]

open access: yesМинералогия, 2018
Zirconolite, a complex oxide with an idealized formula (Ca,REE)Zr(Ti,Fe,Nb)2O7 , is an accessory mineral of Nb ores from alkali pegmatites and carbonatites of the Vishnevogorsk alkaline complex (South Urals, Russia).
V.A. Popov   +3 more
doaj  

Mineralogical and Thermal Analyses of a Bangle Shard from Harrappa, an Indus Valley Settlement in Pakistan [PDF]

open access: yesAnalele Stiintifice ale Universitatii "Al. I. Cuza" din Iasi, Seria Geologie, 57(1), 2011, 69-73, 2012
In this research study we present initial results of a recent project in which mineralogical and thermal analysis were carried out on a terracotta bangle shard from Harrappa. We were surprised to find bentonite clay as the major constituent of the bangle shard.
arxiv  

The oxygen isotopic composition of water extracted from unequilibrated ordinary chondrites [PDF]

open access: yes, 2003
The oxygen isotopic composition of water extracted from the unequilibrated ordinary chondrites Semarkona and Bishunpur reveals differences in alteration mineralogy and levels of isotopic enrichment – reflecting key parameters in the alteration ...
Baker, L.   +3 more
core  

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