Erik Duesterhoeft

Understanding the relationships between density and spatio-thermal variations at convergent plate boundaries is important for deciphering the present-day dynamics and evolution of subduction zones. In particular, the interaction between densification due to mineralogical phase transitions and slab pull forces is subject to ongoing investigations. W...

Thermodynamic datasets are essential for phase equilibrium computations, from which metamorphic pressure and temperature conditions of rocks can be estimated. In addition, they are used to model rock properties such as volume or density. The theoretical framework for thermodynamic volume modeling is imposed by the equation of state (EOS), which can...

This paper introduces the software solution Bingo‐Antidote for thermodynamic calculations at equilibrium based on iterative thermodynamic models. It describes a hybrid strategy combining the strength of Gibbs energy minimization (GEM) and inverse thermobarometry models based on the comparison between the modelled and observed mineral assemblage, mo...

The Bancroft terrane and the associated Central Metasedimentary Belt boundary thrust zone (CMBbtz) represent the northern part of the Central Metasedimentary Belt (CMB) of the Canadian Grenville Province. Only a few direct pressure and temperature calculations based on phase equilibrium petrology methods exist in the central Bancroft terrane, and t...

Theriak-Domino Database using "A-X-Models of deep mantle phases, Holland et al. (2013), J Pet , vol. 54, p. 1901-1920" and seismic velocities of Nagel et al. (2018)

Accessory phosphate minerals, such as monazite and xenotime, are commonly used as geochronometers to provide timing constraints on tectonometamorphic events recorded by the host rocks within which they occur. However, the formation and recrystallization of accessory minerals, and their interaction with major mineral phases, are still poorly underst...

Thermodynamic modeling of compositionally mapped microdomains and whole-rock compositions is used to constrain the pressure–temperature (P–T) evolution of sapphirine granulites and migmatitic paragneisses from the Gruf Complex of the Central Alps. The P–T paths and conditions estimated from granulite microdomains and whole-rock compositions are con...

The astonishing progress of personal computer technology in the past 30 years as well as the availability of thermodynamic data and modeling programs have revolutionized our ability to investigate and quantify metamorphic processes. Equilibrium thermodynamics has played a central role in this revolution, providing simultaneously a physico-chemical...

================See comments to find a link to the full-text================ Deep mantle plumes and associated increased geotherms are expected to cause an upward deflection of the lower–upper mantle boundary and an overall thinning of the mantle transition zone between about 410 and 660 kilometres depth. We use subsequent forward modelling of min...

The Mantle Transition Zone (MTZ) is defined by a series of phase transitions that form the transition between upper and lower mantle. At about 410 km, olivine transforms into wadsleyite, at 510 km into ringwoodite and at about 660 km, ringwoodite and garnet decompose into bridgemanite and periclase. These phase changes cause high-amplitude seismic...

Monazite, xenotime and apatite are accessory phosphate minerals commonly used as geochronometers to provide timing constraints on metamorphic events recorded by the rocks within which they occur. They are also used to investigate trace element partitioning between minerals to understand the behaviour of co-existing mineral phases. Despite widesprea...

Crystallization experiments of basaltic andesite mafic endmember from the 24 ka Lower Pollara eruption (Salina, Aeolian Islands, Italy) were investigated at 200 MPa, 950–1100 °C, in the H2O activity (aH2O) range ~0.3 to 1, and at two ranges of oxygen fugacity (fO2) between ~FMQ to FMQ+1 and ~FMQ+2 to FMQ+3.3 (log bars, FMQ is fayalite-magnetite-qua...

BED92.v1 - "Bermans extended database of 92.version1" This database is build on JUN92d.bs database (based on Berman, 1988 + modifications). Watch the header of the database to find a documentation of all changes.

We investigate the signature relevant mantle lithologies leave in the receiver function record for different adiabatic thermal gradients down to 800 kilometers depth. The parameter space is chosen to target the visibility of upwelling mantle (a plume). Seismic velocities for depleted mantle, primitive mantle, and three pyroxenites are extracted fro...

Am Nord- und Ostrand des Brockengebietes befinden sich jeweils dioritische Zonen, in deren direkter Nachbarschaft Granite mit Beimengungen von Hornblende und Augit (Hornblende-Augitgranit-Folge) auftreten. Der Nordranddiorit des Brockenplutons ist dabei die kleinere magmatische Intrusion von beiden und befindet sich zwischen Ilsensteingranit und Br...

It is broadly accepted that rifting processes represent the initial stage of separating two lithospheric plates as it can be observed in the East-African Plateau region (EAPR). The EAPR is dominated by a pronounced topography with a modern elevation of more than 1000 m. Syn-rift uplift processes such as rift-shoulder uplift or mantle impingement ge...

Understanding the relationships between metamorphism and spatio-thermal variations at convergent plate boundaries is important for deciphering the present-day dynamics of subduction zones. In particular, the interaction between densification due to mineralogical phase transitions and slab pull forces is subject to ongoing investigations. We have th...

We provide new insights into the prograde evolution of HP/LT metasedimentary rocks on the basis of detailed petrologic examination, element-partitioning analysis, and thermodynamic modelling of well-preserved Fe–Mg–carpholite- and Fe–Mg–chloritoid-bearing rocks from the Afyon Zone (Anatolia). We document continuous and discontinuous compositional (...

[1] This study presents the theory, applicability, and merits of the new THERIAK_D add-on for the open source Theriak/Domino software package. The add-on works as an interface between Theriak and user-generated scripts, providing the opportunity to process phase equilibrium computation parameters in a programming environment (e.g., C or MATLAB®). T...

[1] This study presents the theory, applicability, and merits of the new THERIAK_D add-on for the open source Theriak/Domino software package. The add-on works as an interface between Theriak and user-generated scripts, providing the opportunity to process phase equilibrium computation parameters in a programming environment (e.g., C or MATLAB®). T...

Plateau formation processes in geodynamic settings outside of orogens have not been unambiguously established. Those anorogenic plateaus are topographic barriers that reach medium elevations of approximately 1500 m, e.g. South African-, East African- or Mongolian Plateau. They are inferred to be closely link to mantle plumes away from plate boundar...

Subduction is primarily driven by the densification of the downgoing oceanic slab, due to dynamic P-T-fields in subduction zones. It is crucial to unravel slab densification induced by metamorphic reactions to understand the influence on plate dynamics. By analyzing the density and metamorphic structure of subduction zones, we may gain knowledge ab...

Away from active plate boundaries the relationships between spatiotemporal variations in density and geothermal gradient are important for understanding the evolution of topography in continental interiors. In this context the classic concept of the continental lithosphere as comprising three static layers of different densities (upper crust, lower...

Anorogenic plateaus are those topographic barriers that reach medium elevations of approximately 1500 m, e.g. South African-, East African- or Mongolian Plateau. They are inferred to be closely link to mantle plumes away from plate boundaries. Actually, plateau formation processes in geodynamic settings outside of orogens have not been unambiguousl...

Thermodynamic databases are an essential tool to predict complex equilibrium mineral assemblages and mineral properties like mineral volumes. They consist of numerous thermodynamic data of various minerals, extracted from experiments. Each database follows its own methodology in calculating chemical and physical properties. Therefore a direct compa...