Iterative thermodynamic modelling—Part 1: A theoretical scoring technique and a computer program (Bingo‐Antidote)
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Abstract 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, modes and compositions. The overall technique relies on quantitative compositional maps acquired by electron probe micro‐analyser for obtaining a mutually consistent set of observed data such as bulk rock and mineral compositions. Thus it offers the opportunity to investigate metamorphic rocks on a microscale. The scoring part Bingo integrates three statistical model quality factors for the assemblage, for the mineral modes, for the mineral compositions combined in a global evaluation criterion that quantifies how the model reproduces the observations for the investigated volume. The input parameters of GEM affecting the model quality such as pressure, temperature and eventually some components of the bulk composition (e.g. the molar amount of hydrogen, carbon or oxygen) or activity variables of fluids and gases (e.g. , , f(O2)) can be optimized by inversion in Antidote using several mapping stages followed by a direct search optimization. Examples of iterative models based on compositional maps processed with Bingo‐Antidote demonstrate the utility of the program. In contrast to the qualitative interpretation of phase diagrams, the inversion maximizes the benefits of GEM and permits the derivation of statistically ‘optimal’ pressure–temperature conditions for well‐equilibrated samples. In addition, Bingo‐Antidote opens new avenues for petrological investigations such as the generation of chemical potential landscape maps.
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The sample HAL104 of the West Guilford area followed a clockwise P-T trajectory from approximately 780°C and 0.95 GPa to 650°C and 0.6 GPa.
“The sample HAL104 of the West Guilford area followed a clockwise P-T trajectory starting from approximately 780°C and 0.95 GPa to 650°C and 0.6 GPa (see white stars in Fig. 9A) as recently shown by Duesterhoeft and Lanari (2020).”
From The role of excess oxygen for modeling high-Mn, low-Ca garnets in metapelites from the northern Central Metasedimentary Belt of the Grenville Province, Ontario, Canada (2021) · cites this paper as Duesterhoeft and Lanari (2020)
Section 4 identifies HAL104 as a West Guilford sample with distinct peak and retrograde assemblages. Sections 4.3 and 4.6 describe higher-temperature, higher-pressure conditions followed by lower-condition re-equilibration, including an estimate of 649°C and 0.59 GPa. But the paper does not establish the claimed 780°C, 0.95 GPa starting point or a clockwise trajectory; section 4.6 says a proposed P–T trend cannot be completely ruled out as the sample’s trajectory. (LLM, conf=0.84)
Experimental — accuracy not yet measuredSample HAL104 may show a clockwise P-T trajectory starting from approximately 780°C and 0.95 GPa to 650°C and 0.6 GPa.
“The sample may show a clockwise P-T trajectory starting from approximately 780°C and 0.95 GPa to 650°C and 0.6 GPa (see white stars in Fig.9A).”
From The role of excess oxygen for modeling high-Mn, low-Ca garnets in metapelites from the northern Central Metasedimentary Belt of the Grenville Province, Ontario, Canada (2021) · cites this paper as Duesterhoeft and Lanari (2020)
Section 4.5 places HAL104’s inferred peak assemblage within a broad 670–800°C, 0.64–1.0 GPa field, which includes the proposed starting conditions. Section 4.6 reports later re-equilibration at about 660°C and 0.6–0.7 GPa. Our copy does not establish a clockwise trajectory between the stated endpoints, and its reported optimal peak conditions are 671°C and 0.64 GPa. (LLM, conf=0.84)
Experimental — accuracy not yet measuredIterative thermodynamic models (ITM) are built on a forward simulation and coupled to an iterative optimization refining the causal factors.
“Iterative thermodynamic models (ITM) are built on a forward simulation (i.e., equilibrium phase diagrams) and then coupled to an iterative optimization refining the causal factors (Lanari and Duesterhoeft 2019, Duesterhoeft and Lanari 2020).”
From The role of excess oxygen for modeling high-Mn, low-Ca garnets in metapelites from the northern Central Metasedimentary Belt of the Grenville Province, Ontario, Canada (2021) · cites this paper as Duesterhoeft and Lanari 2020
Sample HAL104 of the West Guilford area is investigated with the ITM approach using the software BINGO-ANTIDOTE in an accompanying study by Duesterhoeft and Lanari (2020).
“In an accompanying study byDuesterhoeft and Lanari (2020), sample HAL104 of the West Guilford area is investigated with the ITM approach using the software BINGO-ANTIDOTE.”
From The role of excess oxygen for modeling high-Mn, low-Ca garnets in metapelites from the northern Central Metasedimentary Belt of the Grenville Province, Ontario, Canada (2021) · cites this paper as Duesterhoeft and Lanari (2020)
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POWELL, R., & HOLLAND, T. J. B. (2008) · Journal of Metamorphic Geology · doi:10.1111/j.1525-1314.2007.00756.x · Cited by 522 · cited 2× · see citing works
“As a consequence, the model outcomes are never fully compared with the rock record (Figure 1) and the comparison is rather restricted to the mineral assemblage with sometimes the addition of a few diagnostic isopleths (Lanari & Duesterhoeft, 2019; Powell & Holland, 2008).”
BackgroundResultBerman, R. G. (2007) · doi:10.4095/223228 · Cited by 93 · cited 1× · see citing works
“Multi-equilibrium geothermobarometry was performed using the winTWQ2007 software (Berman, 2007) and the modified internally consistent thermodynamic database ‘JUN92 ’ after Berman (1988; Figure 5a).”
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Duesterhoeft, E., Raase, P., Duguet, M., & Easton, R. M. (2021) · Canadian Journal of Earth Sciences · doi:10.1139/cjes-2019-0238 · Cited by 4 · see citing works
Self-citation
- Authors
- Duesterhoeft, E., & Lanari, P.
- Affiliations
- Christian-Albrechts-Universität zu Kiel (DE)
- University of Bern (CH)
- Corresponding author
- Duesterhoeft, Erik
- Venue
- Journal of Metamorphic Geology
- Publisher
- Wiley
- Published
- 2020-06
- Volume
- 38
- Issue
- 5
- Pages
- 527-551
- ISSN
- 0263-4929 (ISSN-L)
- 1525-1314
- OpenAlex
- W3034761246
- Cited by
- 41
- References
- 2
- Citations by year
- 2026: 7 · 2025: 8 · 2024: 4 · 2023: 8 · 2022: 6 · 2021: 5 · 2020: 3
- FWCI
- 3.37
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Metamorphic Geology (publishedVersion, cc-by-nc-nd)
- BORIS (University Library Bern) (submittedVersion, cc-by-nc-nd)
- Geo-Leo e-docs (Deutsche Initiative für Netzwerkinformation) (submittedVersion, cc-by-nc-nd)
- FID-GEO SUB
- Funders
- Deutsche Forschungsgemeinschaft (DU1603/1‐1)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Geophysics › Geological and Geochemical Analysis
- Physical Sciences › Engineering › Mechanical Engineering › Metallurgical Processes and Thermodynamics
- Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Mineralogy and Gemology Studies
- Keywords
- Gibbs free energy minimization, mineral assemblages, mineral composition, electron probe microanalysis, pressure-temperature conditions, metamorphic rock
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