Bernd Wunder
YOU?
Author Swipe
View article: The coesite–stishovite transition of hydrous, Al-bearing SiO<sub>2</sub>: an in situ synchrotron X-ray study
The coesite–stishovite transition of hydrous, Al-bearing SiO<sub>2</sub>: an in situ synchrotron X-ray study Open
We examined the influence of Al2O3 and H2O on the position of the coesite–stishovite transition by means of in situ X-ray diffraction measurements with the large-volume press at the PETRA III synchrotron in Hamburg. The position of the tra…
View article: Corundum-quartz metastability: the role of silicon diffusion in corundum
Corundum-quartz metastability: the role of silicon diffusion in corundum Open
The synthesis of the Al 2 SiO 5 polymorphs kyanite, sillimanite and andalusite in a pure Al 2 O 3 –SiO 2 –H 2 O (ASH) system has long been known to be impeded. In order to decipher individual aspects of the reaction: corundum + SiO 2 aq , …
View article: Halogen-bearing metasomatizing melt preserved in high-pressure (HP) eclogites of Pfaffenberg, Bohemian Massif
Halogen-bearing metasomatizing melt preserved in high-pressure (HP) eclogites of Pfaffenberg, Bohemian Massif Open
Primary granitic melt inclusions are trapped in garnets of eclogites in the garnet peridotite body of Pfaffenberg, Granulitgebirge (Bohemian Massif, Germany). These polycrystalline inclusions, based on their nature and composition, can be …
View article: Exploring boron isotope fractionation during interaction of silicate melts and hydrous fluids: an experimental approach concerning ore formation
Exploring boron isotope fractionation during interaction of silicate melts and hydrous fluids: an experimental approach concerning ore formation Open
The magmatic-hydrothermal transition is an important but poorly-understood process in the formation of Sn-W, Nb-Ta and Li deposits associated with evolved granites and pegmatites. Theory predicts that boron isotopes will fractionate betwee…
View article: High-pressure eclogites preserve a halogen-bearing metasomatizing agent in primary melt inclusions (Bohemian Massif, Germany).
High-pressure eclogites preserve a halogen-bearing metasomatizing agent in primary melt inclusions (Bohemian Massif, Germany). Open
Garnets in the eclogites of Pfaffenberg, Granulitgebirge (Bohemian Massif, Germany) contain primary granitic melt inclusions with a continental crust signature. The inclusions are up to 30 µm in diameter and polycrystalline with a mai…
View article: In situ study of the reaction phase A plus high-<i>P</i> clinoenstatite to forsterite plus water at reduced water activity
In situ study of the reaction phase A plus high-<i>P</i> clinoenstatite to forsterite plus water at reduced water activity Open
We examined the reaction phase A plus high-P clinoenstatite to forsterite plus water (Reaction R1) by means of in situ X-ray diffraction measurements with the large volume press at the synchrotron PETRA III, Hamburg. Contrary to the study …
View article: H<sub>2</sub>O and Cl in deep crustal melts: the message of melt inclusions in metamorphic rocks
H<sub>2</sub>O and Cl in deep crustal melts: the message of melt inclusions in metamorphic rocks Open
The use of NanoSIMS on primary melt inclusions in partially melted rocks is a powerful approach to clarify the budget of volatiles at depth during crust formation and its reworking. Anatectic melt inclusions are indeed gateways to quantify…
View article: Different embryos of TTGs in garnet at Hooper mine, Adirondacks (New York State, US)
Different embryos of TTGs in garnet at Hooper mine, Adirondacks (New York State, US) Open
Garnet often traps droplets of anatectic melts (i.e. melt inclusions – MI), also called  nanogranitoids once crystallized, whose characterization allows us to clarify deep crustal melting processes. the Adirondacks (US), is an i…
View article: In situ reinvestigation of reaction phase A plus high-pressure clinoenstatite to forsterite plus water in the system MgO-SiO&lt;sub&gt;2&lt;/sub&gt;-H&lt;sub&gt;2&lt;/sub&gt;O (MSH)
In situ reinvestigation of reaction phase A plus high-pressure clinoenstatite to forsterite plus water in the system MgO-SiO<sub>2</sub>-H<sub>2</sub>O (MSH) Open
The dehydration reaction of phase A + high P clinoenstatite to forsterite + water was experimentally investigated at water-saturated conditions in the pressure range between 7.0 and 10.0 GPa by in situ reversal runs in a multi-anvil press …
View article: Orthopyroxene rim growth during reaction of (Co, Ni, Mn, Zn)-doped forsterite and quartz: Experimental constraints on element distribution and grain boundary diffusion
Orthopyroxene rim growth during reaction of (Co, Ni, Mn, Zn)-doped forsterite and quartz: Experimental constraints on element distribution and grain boundary diffusion Open
Mantle metasomatism is an important process in subduction zones in which fluids from the dehydrating oceanic slab interact with the overlying upper mantle resulting in a chemical alteration of the mantle. Consequently, this fluid-rock inte…
View article: New insights in the mechanisms of the reaction 3.65 Å phase = clinoenstatite + water down to nanoscales
New insights in the mechanisms of the reaction 3.65 Å phase = clinoenstatite + water down to nanoscales Open
The reaction of 3.65 Å phase <=> clinoenstatite + water was investigated in five experiments at 10 GPa, 470–600 ∘C, using a rotating multi-anvil press. Under these P/T conditions, clinoenstatite exists in its high-pressure modification, wh…
View article: CSD 2073933: Experimental Crystal Structure Determination
CSD 2073933: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2073677: Experimental Crystal Structure Determination
CSD 2073677: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2009820: Experimental Crystal Structure Determination
CSD 2009820: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: High pressure, halogen-bearing melt in ultra-high temperature felsic granulites of the Central Maine Terrane, Connecticut (US)
High pressure, halogen-bearing melt in ultra-high temperature felsic granulites of the Central Maine Terrane, Connecticut (US) Open
<p>Inclusions of relic high pressure melts provide information on the fate of crustal rocks in the deep roots of orogens during collision and crustal thickening, including at extreme temperature conditions exceeding 1000&#176;C. …
View article: Pristine metasomatic melt preserved in mantle rocks of the Bohemian Massif
Pristine metasomatic melt preserved in mantle rocks of the Bohemian Massif Open
<p>Melt inclusions of very unusual nature occur in garnets of eclogites of the Granulitgebirge, Bohemian Massif. This is one of the first direct characterization of a preserved metasomatic melt responsible for the formation of eclogi…
View article: EMBRYOS OF TTGS IN GORE MOUNTAIN GARNET MEGACRYSTS FROM WATER-FLUXED MELTING OF THE LOWER CRUST
EMBRYOS OF TTGS IN GORE MOUNTAIN GARNET MEGACRYSTS FROM WATER-FLUXED MELTING OF THE LOWER CRUST Open
International audience
View article: High-pressure, halogen-bearing melt preserved in ultrahigh-temperature felsic granulites of the Central Maine Terrane, Connecticut (U.S.A.)
High-pressure, halogen-bearing melt preserved in ultrahigh-temperature felsic granulites of the Central Maine Terrane, Connecticut (U.S.A.) Open
Inclusions of relic high-pressure melts provide crucial information on the fate of crustal rocks in the deep roots of orogens during collision and crustal thickening, including at extreme temperature conditions exceeding 1000 °C. However, …
View article: In situ micro-FTIR spectroscopic investigations of synthetic ammonium phengite under pressure and temperature
In situ micro-FTIR spectroscopic investigations of synthetic ammonium phengite under pressure and temperature Open
Phengite is known to be an important mineral in the transport of alkalis and water to upper mantle depths. Since ammonium (NH4+) can substitute for K+ in K-bearing minerals, phengite is thus a potential host to transport nitrogen into the …
View article: Synthesis and crystal structure of Pb-dominant tourmaline
Synthesis and crystal structure of Pb-dominant tourmaline Open
Pb-dominant tourmaline was synthesized at 700 °C and 200 MPa in two hydrothermal experiments in the system MgO-Al2O3-B2O3-SiO2-PbO-H2O (run OV-4-2) and MgO-Al2O3-B2O3-SiO2-PbO-CaO-Na2O-H2O (run OV-5-3), respectively. Run OV-4-2 forms needl…
View article: Melt inclusions in metamorphic rocks: how localized melting promoted the formation of the Gore Mountains mega garnets (Adirondacks, US)
Melt inclusions in metamorphic rocks: how localized melting promoted the formation of the Gore Mountains mega garnets (Adirondacks, US) Open
<p>Melt inclusions have been for almost 150 years an exclusive feature of magmatic rocks. However, intensive research activity in the last decade has shown that melt inclusions, or nanogranitoids, are also a widespread feature of hig…
View article: Compressibility of synthetic Mg-Al tourmalines to 60 GPa
Compressibility of synthetic Mg-Al tourmalines to 60 GPa Open
High-pressure single-crystal X-ray diffraction patterns on five synthetic Mg-Al tourmalines with near end-member compositions [dravite NaMg3Al6Si6O18(BO3)3(OH)3OH, K-dravite KMg3Al6Si6O18(BO3)3(OH)3OH, magnesio-foitite □(Mg2Al)Al6Si6O18(BO…
View article: A treasure chest full of nanogranitoids: an archive to investigate crustal melting in the Bohemian Massif
A treasure chest full of nanogranitoids: an archive to investigate crustal melting in the Bohemian Massif Open
The central European Bohemian Massif has undergone over two centuries of scientific investigation which has made it a pivotal area for the development and testing of modern geological theories. The discovery of melt inclusions in high-grad…
View article: Synthetic [4]B-bearing dumortierite and natural [4]B-free magnesiodumortierite from the Dora-Maira Massif: differences in boron coordination in response to ultrahigh pressure
Synthetic [4]B-bearing dumortierite and natural [4]B-free magnesiodumortierite from the Dora-Maira Massif: differences in boron coordination in response to ultrahigh pressure Open
Dumortierite was synthesized in piston-cylinder experiments at 2.5–4.0 GPa, 650–700°C in the Al2 O3 –B2 O3 –SiO2 –H2 O (ABSH) system. Electron-microprobe (EMP) analyses reveal significant boron-excess (up to 0.26[4] B per formula unit, pfu…
View article: Partial melting of ultramafic granulites from Dronning Maud Land, Antarctica: Constraints from melt inclusions and thermodynamic modeling
Partial melting of ultramafic granulites from Dronning Maud Land, Antarctica: Constraints from melt inclusions and thermodynamic modeling Open
In the Pan-African belt of the Dronning Maud Land, Antarctica, crystallized melt inclusions (nanogranitoids) occur in garnet from ultramafic granulites. The granulites contain the peak assemblage pargasite+garnet+clinopyroxene with rare re…
View article: A treasure chest full of nanogranitoids: an archive to investigate crustal melting in the Bohemian Massif
A treasure chest full of nanogranitoids: an archive to investigate crustal melting in the Bohemian Massif Open
Dataset of trace element analyses on melt inclusions from high pressure felsic granulites