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Zircon U-Pb age, Trace Element, and Hf Isotopic Compositions of Nordmarkite in the Lizhuang Rare Earth Element Deposit in the Western Margin of the Yangtze Block
nordmarkite REE deposit Hf isotopic characteristics of zircon Lizhuang
2018/1/10
The Mianning–Dechang (MD) rare earth element (REE) belt, located in the northern Kangdian axis (KDA) in the western margin of the Yangtze platform, is one of the most economically significant REE mine...
TRACE ELEMENT DETERMINATIONS COMPARED WITH X-RAY DIFFRACTION RESULTS OF BROWN CLAY IN THE CENTRAL PACIFIC
BROWN CLAY X-RAY DIFFRACTION THE CENTRAL PACIFIC
2011/11/8
Prior to DSDP Leg 17, no sites drilled in the central Pacific had continuously cored a thick section of pelagic brown clay. On Leg 6 several sites were drilled through brown clay, but poor recovery du...
Trace element distribution among rock-forming minerals in Black Hills migmatites, South Dakota: A case for solid-state equilibrium
rock-forming minerals Black Hills migmatites solid-state equilibrium South Dakota
1999/9/5
Proterozoic migmatites in the Black Hills, South Dakota, were examined to determine if parti-
tioning of trace elements hosted by rock-forming minerals between melanosomes and leucosomes
preserves r...
Complex zoning in apatite from the Idaho batholith: A record of magma mixing and intracrystalline trace element diffusion
Idaho batholith magma mixing intracrystalline trace element diffusion REE
1999/4/10
Apatite crystals in a sample of biotite granodiorite from the Idaho batholith display complex chemi-
cal zoning, characterized by abrupt changes in REE+Y+Si content, more subtle variations in S, Na,
...
Trace element analysis with the electron microprobe: New data and perspectives
electron microprobe element analysis
1999/1/3
Thisworkpresentsaproceduredevelopedfortraceelementanalysisusingtheelectron
microprobe(EMP).Themethodisdemonstratedbyanalysisofsevenglassesprepared
fromreferencerockpowders,withcompositionsofgranite,...
Minor and trace element partitioning between pyroxene and melt in rapidly cooled chondrules
Minor trace element partitioning pyroxene melt rapidly cooled chondrules
1997/5/6
Wepresentminorandtraceelement(REE,Sr,Y,andZr)dataforpyroxenesandme-
sostasesinfourporphyriticchondrulesfromtheSemarkonaordinarychondrite.Apparent
partitioncoef?cientsforclinoenstatite,orthoenstatite...
Unequilibrated eucrites and the equilibrated Juvinas eucrite: Pyroxene REE systematics and major, minor, and trace element zoning
eucrites Juvinas eucrite Pyroxene REE systematics major minor trace element zoning
1996/11/6
In unequilibrated eucrites, pyroxene is a sensitive recorder of variables that affect their crystallization histories. Therefore, major,minor,and trace element systematics of pyrox-ene wereevaluated f...
Trace element zoning in pelitic garnet of the Black Hills, South Dakota
Trace element zoning pelitic garnet Black Hills South Dakota
1996/8/6
Traceelement (REE, Cr,Ti,Y,Y,andZr)analysisofgarnetfrom the garnet,staurolite,and lower sillimanite zones ofan aluminous schist ofthe BlackHills,South Dakota,
indicates that REEzoning varies as a fun...
Trace element zoning and incipient metamictization in a lunar zircon: Application of three microprobe techniques
Trace element zoning incipient metamictization lunar zircon Application of three microprobe techniques
1996/8/6
Wehave determined major(Si,Zr,Hf),minor(AI,Y,Fe,P),and trace element (Ca, Sc,Ti,Ba,REE,Th,U)concentrations and Ramanspectra ofazoned, 200~mzircon grainin lunar sample 14161,7069,aquartz monzodioritebr...
Cathodoluminescence of quartz from sandstones: Interpretation of the UV range by determination of trace element distributions and fluid-inclusion P-T-X properties in authigenic
Cathodoluminescence quartz sandstones Interpretation UV range determination trace element distributions fluid-inclusion P-T-X properties authigenic
1996/8/6
Quartz overgrowths from Keuper sandstones of the Paris basin wereexamined using cathodoluminescence (CL) microscopy and spectroscopy coupled witha scanning electron microscope (SEM). Withthe use ofsta...
A reexamination of absorption and enhancement effects in X-ray fluorescence trace element analysis
reexamination of absorption X-ray fluorescence trace element analysis
1996/5/6
In this paper, sample mass-absorption corrections for X-ray fluorescence trace element analysis are reexamined and a new approach is presented that is moreaccurate and more versatile than current meth...
Transformation of Trace Element-Substituted Maghemite to Hematite
Hematite Iron Maghemite Magnetite Particle size Sintering Trace elements
1988/11/1
Abstract: X-ray powder diffraction (XRD), transmission electron microscopy, infrared spectroscopy, differential thermal analysis, and surface area (BET) measurements were employed to investigate the t...
Trace Element Concentration in Amorphous Clays of Volcanic Ash Soils in Oregon
Trace Element Concentration Amorphous Clays Volcanic Ash Soils
1971/12/1
Clay fractions in soils from a transect of the Mazama ash deposit (6600-yr-old) contained more than 80% amorphous material. Instrumental neutron activation analysis was used to compare the trace eleme...