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”
Author Archives: petrochronics
[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”
[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 theContinue reading “[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?”
[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 wasContinue reading “[Article] Implications of the dominant LP–HT deformation in the Guanhães Block for the Araçuaí West-Congo Orogen evolution”
[Article] Spatio–temporal evolution of Mesoproterozoic magmatism in NE Australia: A hybrid tectonic model for final Nuna assembly
EN | Fun, Fun, Fun!! Do you like puzzles and untangling conundrums? Then, check out our proposed tectonic model to explain the tectonic regimes operating back in the Proterozoic (c. 2.0 Ga to 1.4 Ga), when the oldest supercontinent known today, Nuna, formed.In this contribution, we combined previous structural and metamorphic studies with zircon Lu-HfContinue reading “[Article] Spatio–temporal evolution of Mesoproterozoic magmatism in NE Australia: A hybrid tectonic model for final Nuna assembly”
[Article] Multiple P–T–d–t paths reveal the evolution of the final assembly of the supercontinent Nuna (1.6–1.5 Ga) in NE Australia
EN | The integration of petrochronology with metamorphic petrology and petrostructural analysis allowed to identify two discrete metamorphic and deformation stages in the Proterozoic Georgetown Inlier (NE Australia). Robust and precise Lu–Hf geochronology determined garnet growth at 1.6 Ga (M1/D1), which was supported by a similar age from in–situ monazite geochronology. Medium-P/T metamorphism (M1) duringContinue reading “[Article] Multiple P–T–d–t paths reveal the evolution of the final assembly of the supercontinent Nuna (1.6–1.5 Ga) in NE Australia”
[Article] 4D history of the Nimbus VHMS ore deposit in the Yilgarn Craton, Western Australia
EN | The same principle applied to petrochronology can be utilized to better understand the timing and mechanisms of mineralization. Diverse isotopic constrains leads to the understanding of the 4D evolution of deposits, driving future discoveries. Different geochronometers indicate the existence of two main events that have interacted with the Nimbus deposit, Australia. If theContinue reading “[Article] 4D history of the Nimbus VHMS ore deposit in the Yilgarn Craton, Western Australia”
[Article] (U)HT rocks from Madagascar
EN | Madagascar has by spectacular (U)HT rocks. Titanite in these rocks records the waning stages of UHTM followed by pervasive hydrothermal activity associated with U–Th and phlogopite mineralization. Contribution by the researcher Robert Holder (@thats.so.meta).Read more in Holder and Hacker (2019). Fluid-driven resetting of titanite following ultrahigh-temperature metamorphism in southern Madagascar. Chemical Geology! Rochas deContinue reading “[Article] (U)HT rocks from Madagascar”
[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”
PETROCHRONICS 