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PHASE RELATIONS, SINGULARITIES AND THERMOBAROMETRY OF METAMORPHIC ASSEMBLAGES CONTAINING PHENGITE, CHLORITE, BIOTITE, K-FELDSPAR, QUARTZ AND H2O

Simpson G.D.H.; Thompson A.B.; Connolly J.A.D. (2000)

The phase relations of divariant and trivariant assemblages involving combinations of phengite, chlorite, biotite, K-feldspar, quartz and H2O in the KFASH, KMASH and KFMASH systems were calculated using a single thermodynamic ...

PHASE RELATIONS, STRUCTURE AND CRYSTAL CHEMISTRY OF SOME ALUMINOUS SILICATE PEROVSKITES

Kesson S.E.; Gerald J.D.F.; Shelley J.M.G.; Withers R.L. (1995)

Solid solution of #25 mole% Al2O3 expands the compositional stability field of Mg,Fe silicate perovskite well beyond the limits encountered in the simple ternary system MgO-FeO-SiO2. Aluminous perovskites synthesised in ...

PHASE SHIFT INTERFERENCE MICROSCOPE STUDY OF DISSOLUTION-PRECIPITATION PROCESSES OF NONHYDROSTATICALLY STRESSED HALITE CRYSTALS IN SOLUTION

Lohkamper T.H.K.; Jordan G.; Costamagna R.; Stockhert B.; Schmahl W.W. (2003)

Halite single crystals in saturated solution were used to study dissolution precipitation creep (DPC) at conditions where plastic deformation is negligible. Specifically, the free unloaded surfaces of these crystals were ...

PHASE TRANSFORMATIONS AND PARTITIONING RELATIONS IN PERIDOTITE UNDER LOWER MANTLE CONDITIONS

Wood B.J. (2000)

The phase transformations which take place in peridotite between 19 and 25 GPa have been investigated by performing experiments at closely spaced pressure intervals. All reactions involving Mg-perovskite are influenced by ...

PHASE TRANSFORMATIONS AND REACTION KINETICS DURING THE TEMPERATURE-INDUCED OXIDATION OF NATURAL OLIVINE

Gualtieri A.F.; Gemmi M.; Dapiaggi M. (2003)

This work describes the sequence of transformations and their reaction kinetics during the oxidation of olivine in air at high temperature. A natural olivine sample from the layered series of the Ivrea-Verbano igneous ...

PHASE TRANSFORMATIONS INDUCED BY SOLID SOLUTION

Heaney P.J. (2000)

Small concentrations of impurities can create profound differences in the thermodynamic stability and the physical behavior of crystalline materials. The dramatic changes produced by chemical substitutions are perhaps best ...

PHASE TRANSFORMATIONS OF PHOSPHATES DURING SEDIMENTATION AND GENESIS OF PHOSPHORITES

Kholodov V.N. (2004)

The paper outlines the phosphorus cycle from magmatogenic apatite on continents to hydrogenic phosphorites in seas and oceans. It is established that terrigenous apatite is transformed into hydrogenic forms within weathering ...

PHASE TRANSITION AND COMPRESSION BEHAVIOR OF GIBBSITE UNDER HIGH-PRESSURE

Liu H.; Hu J.; Xu J.; Liu Z.; Shu J.; Mao H.K.; Chen J. (2004)

In situ high-pressure synchrotron X-ray diffraction and infrared absorption experiments for gibbsite were performed at room temperature up to 53 and 25 GPa, respectively. A phase transition was confirmed at about 2.5 GPa. ...

PHASE TRANSITION AND MIXING BEHAVIOUR OF THE CUMMINGTONITE-GRUNERITE SOLID SOLUTION

Boffa Ballaran T.; Carpenter M.A.; Domeneghetti M.C. (2001)

Natural amphiboles with composition close to the binary join cummingtonite-grunerite and crystals of the same samples annealed at 700 °C for 55.5 h, in order to obtain different degrees of non-convergent cation order, have ...

PHASE TRANSITION AND STRUCTURAL FEATURES OF CRYSTALS IN BINARY KALSI3O8-KFESI3O8 SYSTEM AT P = 100 MPA AND T = 400-600°C

Taroev V.K.; Kashaev A.A.; Lashkevich V.V.; Goettlicher J.; Pentinghaus H.; Wulf-Bernotat X.; Tauson V.L.; Suvorova L.F.; Kroll H. (2003)

The phenomenon of the iron incorporation into feldspars because of wide abundance is of particular interest for investigators in order to get the information about the conditions of formation and structural features of ...

PHASE TRANSITION OF ZIRCON AT HIGH P-T CONDITIONS

Ono S.; Funakoshi K.; Nakajima Y.; Tange Y.; Katsura T. (2004)

In situ observations of the zircon-reidite transition in ZrSiO4 were carried out using a multianvil high-pressure apparatus and synchrotron radiation. The phase boundary between zircon and reidite was determined to be P ...

PHASE TRANSITIONS AND HEAT CONDUCTION IN POST-GLACIAL REBOUND

Tamisiea M.E.; Wahr J.M. (2002)

We have developed a method for including phase boundary conditions into post-glacial rebound models that allows for conduction of latent heat away from the boundary. This method returns the chemical boundary results if ...

PHASE TRANSITIONS AND SHORT TIMESCALE SINUSOIDAL MOTIONS

Tamisiea M.E.; Wahr J.M. (2002)

While the effects of phase transitions of mantle materials are considered in convection studies, models of geophysical processes that occur on shorter timescales, such as seismic normal modes and Earth tides, often ignore ...

PHASE TRANSITIONS IN LAWSONITE: A CALORIMETRIC STUDY

Martín-Olalla J.M.; Hayward S.A.; Meyer H.W.; Ramos S.; del Cerro J.; Carpenter M.A. (2001)

The specific heat of lawsonite, CaAl2Si2O7(OH)(2).H2O, has been measured in the temperature range 125 K - 325 K. An anomaly is seen at 273 K, which is related to the Cmcm - Pmcn phase transition. The magnitude of the total ...

PHASE TRANSITIONS IN PEROVSKITES NEAR THE TRICRITICAL POINT: AN EXPERIMENTAL STUDY OF KMN(L-X)CA(X)F3 AND SRTIO3

Gallardo M.C.; Romero F.J.; Hayward S.A.; Salje E.K.H.; Del Cerro J. (2000)

We present experimental data for the Pm3m-I4/mcm phase transitions in the perovskite crystals KMn1-xCaxF3 and SrTiO3. Comparison of calorimetric data (latent heat and specific heat) with order parameter data (measured with ...

PHASE TRANSITIONS IN PYROLITIC MANTLE AROUND 670-KM DEPTH: IMPLICATIONS FOR UPWELLING OF PLUMES FROM THE LOWER MANTLE

Hirose K. (2002)

Phase relations in the natural pyrolitic mantle composition (KLB-1) around 670-km depth have been determined at 1600–2200°C by high-pressure experiments using multianvil apparatus. A phase transition between majorite garnet ...

PHASE TRANSITIONS IN THE MARTIAN MANTLE: IMPLICATIONS FOR PARTIALLY LAYERED CONVECTION

Breuer D.; Yuen D.A.; Spohn T. (1997)

Numerical simulations of mantle convection in Mars, using an axisymmetric spherical-shell model, show partial layering caused by the two exothermic olivine-spinel (α-β, β-γ) phase transitions. An extended Boussinesq ...

PHASE-AMPLITUDE MODULATION OF A SEISMOACOUSTIC WAVE UNDER MOON-SUN TIDES

Bogolyubov B.N.; Lobanov V.N.; Nazarov V.E.; Rylov V.I.; Stromkov A.A.; Talanov V.I. (2004)

The effect of diurnal tides observed during a field experiment investigating the phase-amplitude modulation of a seismoacoustic P wave that propagated in porous oil- and gas-saturated sandstone is explained in terms of ...

PHASE-EQUILIBRIUM CONSTRAINTS ON THE MAGMATIC ORIGIN OF LAURITE + RU-OS-LR ALLOY

Andrews D.R.A.; Brenan J.M. (2002)

To more completely assess the origin of associated laurite (RuS2) and Ru-Os-Ir (IPGE) alloy which are found as inclusions in near-liquidus phenocrysts such as chromian spinel, we conducted experiments to evaluate the effects ...

PHASES OF EARTHQUAKE'S PREPARATION AND BY CHANCE TEST OF SEISMIC QUIESCENCE ANOMALY

Sobolev G.A.; Huang Q.; Nagao T. (2002)

A recently proposed predictive parameter of region–time–length (RTL) was tested using the seismological catalogues of Kamchatka (Russia) and Japan Meteorological Agency (JMA). We introduced the RTL algorithm and summarized ...

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