[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 aContinue reading “[LPT] Granulite thermobarometry with Al in orthopyroxene”

[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 abordaContinue reading “[LPT] Thermodynamic Modeling With THERIAK-DOMINO”

[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 aContinue reading “[LPT] Diffusion Chronometry Geospeedometry”

[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 considerablyContinue reading “[LPT] Electron Microprobe U-Th-Pb Monazite Dating”

[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-BRContinue reading “[LPT] Lu-Hf Garnet dating”

[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 indicarContinue reading “[LPT] Raman Spectroscopy”

[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 comContinue reading “[LPT] Zirconium-in-Rutile Geothermometer”

[Tips] Zircon role in Petrochronology

EN | Zircon is a petrochronology superstar and here is why: besides being a very robust chronometer, it can record different geological conditions during the formation of a rock. For example, are you aware that zircon morphology may constrain the temperature in which it was crystallized? Within this context, Araujo et al. (2020) explored zirconContinue reading “[Tips] Zircon role in Petrochronology”

[TST] Late-magmatic fluid induced alteration in the Itaporé batholith rocks

EN | Late-magmatic fluid induced alteration is outstandingly marked in the Itaporé batholith rocks: This evolution in the alteration degree is evidenced by siderophyllite (Bt) to phengite (Ph) to muscovite (Ms) transitions. The intense degree of alteration in the two-mica granite (a) and the muscovite leucogranite (b) result in a significant deviation from the parentalContinue reading “[TST] Late-magmatic fluid induced alteration in the Itaporé batholith rocks”