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Petrochronological studies made by our collaborators

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[LPT] Granulite thermobarometry with Al in orthopyroxene

EN | In the world of high-grade metamorphic rocks, things can get a little tricky: from element compatibility, closure temperatures from chemical systems and migmatite field structures. One process that may occur is the late Fe-Mg exchange between minerals such as orthopyroxene, garnet and biotite. Our post shares how Pattison et al. (2003) found a…

[LPT] Thermodynamic Modeling With THERIAK-DOMINO

EN | This time, the #LearningPetroTools addresses “THERMODYNAMIC MODELING WITH THERIAK-DOMINO”. What is Theriak-Domino? What is it for and how to use it? What are the theoretical concepts behind this software and how thermodynamic modeling can help us to tell the metamorphic story of our rocks? Follow the post and find out!  PT | Desta vez, o #LearningPetroTools aborda…

[LPT] Diffusion Chronometry Geospeedometry

EN | Diffusion chronometry, also known as geospeedometry, is a technique that can be used to constrain the duration of thermal pulses of a geological event, for example, by modeling the diffusion of element profiles in minerals. The technique involves measuring the diffusive loss of an element during the heating and/or cooling history of a…

[LPT] Electron Microprobe U-Th-Pb Monazite Dating

En | Monazite is widely used in petrochronological studies, as it is one of the most common radioactive minerals and one of the main hosts of U and Th in igneous and metamorphic rocks. Among the different methods used for its dating, the electron microprobe stands out for its operational cost and spot size considerably…

[LPT] Lu-Hf Garnet dating

EN | Garnet is one of the main metamorphic minerals and isotopic dating of this mineral can constrain processes such as melt extraction and peritectic garnet formation, within different geological contexts. One of the isotopic systems used is the Lu-Hf system by dissolution. Check out some quick info about this method and result examples. PT-BR…

[LPT] Raman Spectroscopy

EN | This post is about Raman Spectroscopy: Zircon structure. How does this tool work? How can it indicate damage in zircon structure? Can it be useful in my research? Follow the post and find out! PT-BR | Essa publicação é sobre Espectroscopia Raman: Estrutura do zircão. Como esta ferramenta funciona? Como ela pode indicar…

[LPT] Zirconium-in-Rutile Geothermometer

EN | We will start our new project with a brief summary of the Zirconium-in-Rutile Geothermometer. How does this geothermometer work? How can it help us tell the thermal story of an orogen? Could this tool be useful for my research? Follow the post and find out! PT-BR | Vamos inaugurar nosso novo projeto com…

[Article] Zircon petrochronology reveals the moderately juvenile signature of a diatexite from the boundary zone between the Brasília and Ribeira orogens (SE Brazil): Relict of a Tonian arc?

EN | How fun is to find an exception to the rule?In our contribution we report a biotite-bearing granitic leucosome from Socorro-Guaxupé nappe of the Southern Brasília orogen with an anomalous juvenile-like signature.The zircon extracted from this rock yield a protracted spread of U–Pb ages from ca. 890 Ma to ca. 540 Ma and the…

[Article] Implications of the dominant LP–HT deformation in the Guanhães Block for the Araçuaí West-Congo Orogen evolution

EN | For far too long has the Guanhães Block been viewed as an empty square in the evolutionary models of the Araçuaí-West-Congo Orogen. A new publication in Gondwana Research uses petrochronological strategies with dating of multiple mineral phases, traditional thermobarometry and phase-diagram modeling to understand the conditions in which the main pervasive foliation was…

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