Browsing ELibrary by Subject "Garnet"

Now showing items 1-8 of 8

CHANGES IN THE LOCAL COORDINATION OF TRACE RARE-EARTH ELEMENTS IN GARNETS BY HIGH-ENERGY XAFS: NEW DATA ON DYSPROSIUM

Quartieri S.; Dalconi M.C.; Boscherini F.; Oberti R.; D'Acapito F. (2004)

The site location and local geometry of trace amounts (299 ppm) of dysprosium in a natural melanite garnet from a carbonatitic rock have been studied by high-energy fluorescence-detected X-ray absorption fine-structure ...
EVIDENCE OF SUBDUCTION AND CRUST-MANTLE MIXING FROM A SINGLE DIAMOND

Schulze D.J.; Harte B.; Valley J.W.; Channer D.M.DeR. (2004)

Cathodoluminescence (CL) imaging of polished sections of a diamond from the Guaniamo region of Venezuela suggests a history of the diamond involving two periods of growth separated by a period of resorption and possibly ...
HF ISOTOPE COMPOSITIONS AND HREE VARIATIONS IN OFF-CRATON GARNET AND SPINEL PERIDOTITE XENOLITHS FROM CENTRAL ASIA

Ionov D.A.; Weis D.; Blichert-Toft J. (2005)

Garnet-facies continental mantle is poorly understood because the vast majority of mantle xenoliths in continental basalts are spinel peridotite. Peridotite xenoliths from Vitim (southern Siberia) and Mongolia provide some ...
RECALIBRATION OF MUTUALLY CONSISTENT GARNET-BIOTITE AND GARNET-CORDIERITE GEOTHERMOMETERS

Kaneko Y.; Miyano T. (2004)

Garnet–biotite and garnet–cordierite geothermometers have been consistently calibrated, using the results of Fe2+–Mg cation exchange experiments and utilizing recently evaluated nonideal mixing properties of garnet. Nonideal ...
TEMPERATURES OF GRANULITE-FACIES METAMORPHISM: CONSTRAINTS FROM EXPERIMENTAL PHASE EQUILIBRIA AND THERMOBAROMETRY CORRECTED FOR RETROGRADE EXCHANGE

Pattison D.R.M.; Chacko T.; Farquhar J.; McFarlane C.R.M. (2003)

This study assesses temperatures of formation of common granulites by combining experimental constraints on the P–T stability of granulite-facies mineral associations with a garnet–orthopyroxene (Grt–Opx) thermobarometry ...
THE CRYSTAL CHEMISTRY AND FE"-SITE PROPERTIES OF ALUMINOSILICATE GARNET SOLID SOLUTIONS AS REVEALED BY MöSSBAUER SPECTROSCOPY AND ELECTRONIC STRUCTURE CALCULATIONS

Geiger C.A.; Grodzicki M.; Amthauer G. (2003)

The three binary garnet solid solutions FeII3Al2Si3O12–XII3Al2Si3O12 (XII = MgII, MnII, CaII) have been investigated by 57^Fe Mssbauer spectroscopy at 298 and 77 K and by electronic structure calculations in the local spin ...
THE TRACE ELEMENT COMPOSITION OF SILICATE INCLUSIONS IN DIAMONDS: A REVIEW

Stachel T.; Tappert R.; Aulbach S.; Brey G.P.; Leost I.; Harris J.W.; Viljoen K.S. (2004)

On a global scale, peridotitic garnet inclusions in diamonds from the subcratonic lithosphere indicate an evolution from strongly sinusoidal REEN, typical for harzburgitic garnets, to mildly sinusoidal or “normal” patterns ...
TRACE ELEMENT INCORPORATION INTO PYROPE-GROSSULAR SOLID SOLUTIONS: AN ATOMISTIC SIMULATION STUDY

van Westrenen W.; Blundy J.D.; Allan N.L.; Lucas B.R.; Lavrentiev M.Yu.; Purton J.A. (2003)

We have performed atomistic computer simulations on trace element incorporation into the divalent dodecahedral X-sites of pyrope (Py — Mg3Al2Si3O12) – grossular (Gr — Ca3Al2Si3O12) solid solutions. An ionic model and the ...

Browsing ELibrary by Subject "Garnet"

Browsing ELibrary by Subject "Garnet"

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