Browsing ELibrary by Author "Ulmer P."

Now showing items 1-11 of 11

A NOVEL APPROACH TO DETERMINE HIGH-PRESSURE HIGH-TEMPERATURE FLUID AND MELT COMPOSITIONS USING DIAMOND-TRAP EXPERIMENTS

Kessel R.; Ulmer P.; Schmidt M.W.; Thompson A.B.; Pettke T. (2004)

We have developed a novel analytical technique for diamond-trap experiments to directly analyze high-pressure, high-temperature fluid and melt compositions in equilibrium with mantle material. Experiments were conducted ...
A ROCKING MULTIANVIL: ELIMINATION OF CHEMICAL SEGREGATION IN FLUID-SATURATED HIGH-PRESSURE EXPERIMENTS

Schmidt M.W.; Ulmer P. (2004)

Fluid saturated high-pressure experiments often result in strongly zoned experimental charges, this hinders experimentation in chemically homogeneous systems which in turn has serious consequences on equilibration, reaction ...
EXPERIMENTAL APPROACH TO CONSTRAIN SECOND CRITICAL END POINTS IN FLUID/SILICATE SYSTEMS: NEAR-SOLIDUS FLUIDS AND MELTS IN THE SYSTEM ALBITE-H2O

Stalder R.; Ulmer P.; Thompson A.B.; Günther D. (2000)

Experimental investigations in the system albite-water have been carried out to evaluate the accuracy of a new procedure to determine major-element solubilities in fluid phases and water solubilities in melts. The system ...
GENERATION AND DIFFERENTIATION OF GROUP II KIMBERLITES: CONSTRAINTS FROM A HIGH-PRESSURE EXPERIMENTAL STUDY TO 10 GPA

Ulmer P.; Sweeney R.J. (2002)

Experiments have been performed in the multicomponent (natural) bulk system to constrain the conditions of generation and differentiation of a K-rich group II kimberlite (now also referred to as orangeite). The group II ...
H2O ACTIVITY IN H2O-N2 FLUIDS AT HIGH PRESSURE AND TEMPERATURE MEASURED BY THE BRUCITE-PERICLASE EQUILIBRIUM

Haefner A.; Aranovich L.Y.; Connolly J.A.D.; Ulmer P. (2002)

We present experimental results constraining water activity in H2O-N2 fluids containing 40–90 mol% water at pressures of 6–13 kbar and temperatures of 680–840 °C. In the experiments, the displacement of the brucite dehydration ...
HIGH PRESSURE FLUIDS IN THE SYSTEM MGO-SIO2-H2O UNDER UPPER MANTLE CONDITIONS

Stalder R.; Ulmer P.; Thompson A.B.; Günther D. (2001)

Fluids and melts have been trapped and analysed in high pressure experiments in the model mantle system MgO-SiO2-H2O at 6 to 10.5 GPa and 900 to 1,200 °C. The fluid/melt traps consisted of a diamond layer that was added ...
MELTING OF BIOTITE + PLAGIOCLASE + QUARTZ GNEISSES: THE ROLE OF H2O IN THE STABILITY OF AMPHIBOLE

Gardien V.; Thompson A.B.; Ulmer P. (2000)

Biotite + plagioclase + quartz (BPQ) is a common assemblage in gneisses, metasediments and metamorphosed granitic to granodioritic intrusions. Melting experiments on an assemblage consisting of 24 vol. % quartz, 25 vol. % ...
PHASE RELATIONS OF A SERPENTINE COMPOSITION BETWEEN 5 AND 14 GPA: SIGNIFICANCE OF CLINOHUMITE AND PHASE E AS WATER CARRIERS INTO THE TRANSITION ZONE

Stalder R.; Ulmer P. (2001)

Run products from high pressure experiments at 800-1,200 C and 5-14 GPa (corresponding to depths of 150 to 420 km) on a serpentine bulk composition [close to Mg3Si2O5(OH)4] were analysed by optical microscopy, micro-Raman ...
THE LIQUID LINE OF DESCENT OF ANHYDROUS, MANTLE-DERIVED, THOLEIITIC LIQUIDS BY FRACTIONAL AND EQUILIBRIUM CRYSTALLIZATION--AN EXPERIMENTAL STUDY AT 1.0 GPA

Villiger S.; Ulmer P.; Muntener O.; Thompson A.B. (2004)

Two series of anhydrous experiments have been performed in an end-loaded piston cylinder apparatus on a primitive, mantle-derived tholeiitic basalt at 1.0 GPa pressure and temperatures in the range 1060–1330°C. The ...
THE LIQUID LINE OF DESCENT OF ANHYDROUS, MANTLE-DERIVED, THOLEIITIC LIQUIDS BY FRACTIONAL AND EQUILIBRIUM CRYSTALLIZATION-AN EXPERIMENTAL STUDY AT 1.0 GPA

Villiger S.; Ulmer P.; Muntener O.; Thompson A.B. (2004)

Two series of anhydrous experiments have been performed in an end-loaded piston cylinder apparatus on a primitive, mantle-derived tholeiitic basalt at 1·0?GPa pressure and temperatures in the range 1060–1330°C. The ...
THE STABILITY OF HYDROUS POTASSIC PHASES IN LHERZOLITIC MANTLE-AN EXPERIMENTAL STUDY TO 9.5 GPA IN SIMPLIFIED AND NATURAL BULK COMPOSITIONS

Konzett J.; Ulmer P. (1999)

To investigate the pressure stability limit of phlogopite and the pressure–temperature stability field of its breakdown product K-richterite, experiments were conducted from 4.0 to 9.5 GPa and between 800°C and 1400°C in ...

Browsing ELibrary by Author "Ulmer P."

Browsing ELibrary by Author "Ulmer P."

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