A5045319666- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Geological and Tectonic Studies in Latin America
- High-pressure geophysics and materials
- Geological and Geophysical Studies Worldwide
- Evolution and Paleontology Studies
- Geomagnetism and Paleomagnetism Studies
- Hydrocarbon exploration and reservoir analysis
- Geological formations and processes
- Geochemistry and Elemental Analysis
- Geological Studies and Exploration
- Pleistocene-Era Hominins and Archaeology
- Landslides and related hazards
- Environmental and Cultural Studies in Latin America and Beyond
- Soil Geostatistics and Mapping
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Cryospheric studies and observations
- Mechatronics Education and Applications
- Digital Transformation in Industry
- Botany and Geology in Latin America and Caribbean
Universidad del Desarrollo
2021-2025
University of El Salvador
2024
Universidad del Desarrollo del Estado de Puebla
2022
Universidad Andrés Bello
2015-2021
University of Brescia
2021
Pontificia Universidad Católica de Chile
2019
University of Chile
2006-2018
University of Concepción
2018
Instituto Oceanográfico de la Armada del Ecuador
2014
Research Article| September 01, 2011 Kinematic evolution of the Patagonian retroarc fold-and-thrust belt and Magallanes foreland basin, Chile Argentina, 51°30′S Julie C. Fosdick; Fosdick † 1Department Geological Environmental Sciences, Stanford University, Stanford, California 94305, USA †E-mail: julief@stanford.edu Search for other works by this author on: GSW Google Scholar Brian W. Romans; Romans 2Chevron Energy Technology Company, San Ramon, 94583, Andrea Fildani; Fildani Anne Bernhardt;...
Magmatic and detrital zircon ages from the Rocas Verdes basin, a tectonically juxtaposed remnant of sea floor in Magallanes fold thrust belt (southern Patagonia, South America), indicates that rifting phase basin occurred between 152 142 Ma, was accompanied by bimodal magmatism. A dacite dyke cross-cutting pillow-basalt successions plagiogranite mixed mafic–felsic terranes basal Sarmiento Ophiolite Complex contain 150 Ma crystals, indicating mafic submarine volcanism had started prior to or...
Supposed or potential Devonian igneous rocks in the accretionary complex of southern Chile were investigated using sensitive high-resolution ion microprobe U–Pb dating zircon, with Hf- and O-isotope analyses selected grains. Ages 384 ± 3 382 2 Ma are confirmed for two bodies (another having been previously dated at 397 1 Ma). Detrital zircon ages host rocks, some associated marine fossils, indicate maximum possible sedimentation c . 330 – 385 Ma. 391 10 374 plutonic western edge North...
The Patagonian and Fuegian Andes are made up in part by late Paleozoic to Mesozoic metamorphic complexes. mostly low grade Eastern Metamorphic Complex (EAMC) crops out the East of Meso-Cenozoic South batholith (SPB), which intruded protholit EAMC was likely deposited a passive margin setting at Puerto Eden area underwent Late Jurassic sillimanite migmatite local conditions. It is suspected, but not proven, that Cordillera Darwin higher complex equivalent EAMC. West SPB, paleo subduction...
Previous work has shown that Devonian magmatism in the southern Andes occurred two contemporaneous belts: one emplaced continental crust of North Patagonian Massif and other an oceanic island arc terrane to west, Chaitenia, which was later accreted Patagonia. The country rocks plutonic consist metasedimentary complexes crop out sporadically on both sides Argentina-Chile border, additionally pillow metabasalts for Chaitenia. Detrital zircon SHRIMP U-Pb age determinations 13 samples these...
Abstract U-Pb zircon geochronology and isotopic records have played an influential role in our understanding of convergent margin dynamics. Orogenic cyclicity models link tectonic regimes with magmatic signatures advancing orogens, relating compressional evolved extension juvenile signatures; however, such frameworks may not apply for retreating which commonly produce substantial crustal heterogeneities during backarc rifting ocean spreading. We explore the Mesozoic to Cenozoic Patagonian...
Abstract: The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, mid-Jurassic and younger volcano-sedimentary cover, suite Jurassic granites, all which were jointly metamorphosed during Cretaceous. Detrital zircon ages presented here show that some amphibolite-facies metamorphic rocks previously mapped as have protolith. Overall detrital age patterns for samples differ from those Madre de Dios Terrane western Patagonian with they...
The Coastal Batholith of south-central Chile between latitudes 33° and 40°S is composed calc-alkaline granitoids emplaced in a relatively restricted time period. New SHRIMP U-Pb zircon ages on eight quartzdioritic to granitic rocks collected over distance 800 km yielded 300 320 Ma, Pennsylvanian (late Carboniferous). Lu-Hf isotopic analyses the same grains have initial εHf(i) values from +1.67 -5.64. δ18O ratios for that range 6.4 8.6‰. These new data point relative homogeneous source with...
Remnants of coeval Devonian oceanic and continental foreland rocks are preserved in the basement North Patagonian Andes. Our previous studies igneous here have shown that primitive belong to a marginal basin opened closed over 50 Myr. A structural study four new U–Pb SHRIMP ages zircon Hf–O determinations allowed identification three metamorphic episodes, first one which, M 1 (D -S ), is with Andean-type granite intrusion (405–380 Ma). This activity was simultaneous development an ridge...
In the Guarguaraz Complex of Argentine Frontal Cordillera (latitude 33.3°S) serpentinite lenses, metabasites, and garnet-bearing metasedimentary rocks occur.The corresponding Devonian metamorphic event was assigned to formation an accretionary wedge by previous authors.We have tested this hypothesis investigating evolution a pelite from complex.Garnet in rock shows well evolved prograde zoning.Potassic white mica with Si contents between 3.38 (core) 3.12 (rim) per formula unit, biotite,...
The ophiolitic remnants of the Upper Mesozoic Rocas Verdes basin in southernmost South America were studied from perspectives petrography, chemistry minerals, bulk-rock geochemistry, and U-Pb geochronology. study aimed to unravel tectonic, magmatic, metamorphic evolution a suprasubduction rift zone that underwent transition back-arc basin. rifting phase bimodal magmatism within started prior or during Late Jurassic, as indicated by gabbro contact with pillow basalts dated at 154 Ma. In...
A small body of orbicular granodiorite crops out on the Recoba Hill, immediately east town Chaitén, in mainland area called Chiloé continental, southern Chile. The rock comprises cm-sized igneous cores with a single shell fine-grained plagioclase-quartz-K-feldspar assemblages. It is hosted Miocene granodiorite, and it crosscut by aplite mafic dikes. No other mention rocks has to date been reported for >1,000 km long North Patagonian Batholith, suggesting that conditions necessary their...