A5017299847- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Geography and Environmental Studies
- Geological formations and processes
- Geochemistry and Elemental Analysis
- Hydrocarbon exploration and reservoir analysis
- earthquake and tectonic studies
- Geological and Geophysical Studies
- Geological and Geophysical Studies Worldwide
- Groundwater and Isotope Geochemistry
- Geological Studies and Exploration
- Geophysical and Geoelectrical Methods
- Karst Systems and Hydrogeology
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Fish biology, ecology, and behavior
- Academic Research in Diverse Fields
- Geological and Tectonic Studies in Latin America
- Dental Implant Techniques and Outcomes
- Calcium Carbonate Crystallization and Inhibition
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Coral and Marine Ecosystems Studies
Universidade Federal do Paraná
2015-2024
Massachusetts Institute of Technology
2024
California Institute of Technology
2022
Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul
2018
Sociedade Brasileira de Geofísica
2014
Universidade de São Paulo
2002-2010
Instituto de Geociencias
2002-2008
Abstract Contributions of abiotic and biotic processes on travertine deposition are still not well‐understood due to technical difficulties, despite that the travertines draw attention as analogues for ancient microbial carbonates oil reservoirs. To evaluate their contributions, this study examined eight hot springs in Japan. Water chemistry analyses showed common downstream trends: a decrease CO 2 concentration increases 3 2− pH. Mineralogical analysis constituent minerals at six were both...
Geochronological study of deformed alkaline rocks belonging to the NE-SW oriented ellipsoidal Betara and Tigre basement nuclei, located in midst metavolcanossedimentary Apiaí Belt provide new data on superimposed tectonic events regions complex geological history. Protomylonitic, mylonitic ultramylonitic syenogranites predominate exhibit lithogeochemical characters anorogenic 'A' type granites. U-Pb (zircon) dating indicates Paleoproterozoic ages 1748 ± 5.4 Ma Nuclei 1772 9.5 Nuclei. These...
Summary Microbialite‐producing microorganisms that inhabit the Puna lakes are traditionally considered constituents of fragile microsystems, unable to resist important environmental variations. Nevertheless, this region has experienced significant climatic fluctuations during Holocene, raising unsolved issue on how microbialite‐forming systems have been able these changes. Turquesa lake, located within Quaternary Peinado lake‐basin (Puna), faces a hydric crisis in last decades, which...
Abstract The study of microbialites development is a key tool to understand environmental pathways during deposition. We provide detailed analysis modern Central Andean from high‐altitude lakes. stratigraphic record Turquesa Lake shows significant short‐term recolonization by microbialite‐producing microorganisms stress. Far crisis paradigm, the coasts and paleocoasts lake exhibit three microbialitic buildups formed along different stages, providing good case biological resilience these...
The main aim of this work is to present and discuss the U-Pb ages obtained for zircon grains from metavolcanic rocks Itaiacoca Group. Group a metavolcano-sedimentary sequence, which occurs as narrow belt between Cunhaporanga granitic batholith northwest Itapirapuã shear zone south southwest, separates sequence Três Córregos granite metasedimentary Açungui Geological studies southern part led recognition three units, represented (from base top) by metawackes with an important volcanic...
Aripuana is a Paleoproterozoic (1.76-1.75 Ga), stratiform, volcanogenic Zn-Pb-Ag-(Au-Cu) massive sulfide deposit, has an estimated resource of 11.6 million metric tons (Mt) ore, and located on the south-southwest border Amazon craton (Brazil). resides in caldera composed strongly fractionated, felsic metavolcanic rocks, transitional between calc-alkaline tholeiitic compositions. The entire region was metamorphosed into lower greenschist facies (1.68-1.63 Ga) deposit subsequently thermally...
The Capiru Formation consists of a low-grade meta-sedimentary succession slates, phyllites, quartzites and marbles, disposed in blocks delimited by thrust strike-slip faults the Curitiba Terrane, Southern Ribeira Belt, Brazil. metamorphic deformation records are heterogeneous, with deformed zones tectonically interbedded domains preserved sedimentary features. present work aims to understand development mineral paragenesis based on geochemical petrographic analysis. We selected samples...
Mg clay minerals are usually associated with carbonates in alkaline-saline environments, precipitated from solution and/or transformation other minerals. The aim of this research is to identify the mineralogy and geochemistry different alkaline lakes Nhecolândia region, southernmost region Pantanal wetland (Brazil). Sediment samples were analyzed by X-ray diffraction, fluorescence, scanning electron microscopy transmission microscopy. Water analyzed, determining their main cations anions,...
We present new petrographic, whole-rock geochemistry, and SHRIMP U – Pb zircon geochronological data of metabasic rocks interlayered as sills in the metasedimentary units Perau Betara formations, Votuverava Group, Southern Ribeira Belt, Brazil. These formations overlie ~ 1.8 Ga Paleoproterozoic metagranitoids that represent basement inliers from Paranapanema Craton. Petrography geochemistry allow recognition four groups, ranging primitive to evolved compositions: i) cumulatic metadolerites...
The Setuva Nucleus is located in the eastern part of Paraná, south Lancinha Shear Zone. It occurs as an elongated sygmoidal shape within metassedimentary sequences Capirú Formation. represented by promomylonitic to mylonitic rocks, predominating gneissic-migmatitic lithotypes southern portion and syenogranitic monzogranodioritic rocks central – northern portions. U-Pb isotopic pattern zircons characterizes formation during Archean (3.200-3.000Ma), proto (northern portions) (~2.650Ma))...
The Setuva Nucleus is located in the eastern part of Parana, south Lancinha Shear Zone. It occurs as an elongated sygmoidal shape within metassedimentary sequences Capiru Formation. represented by promomylonitic to mylonitic rocks, predominating gneissic-migmatitic lithotypes southern portion and syenogranitic monzogranodioritic rocks central – northern portions. U-Pb isotopic pattern zircons characterizes formation during Archean (3.200-3.000Ma), proto (northern portions) (~2.650Ma))...