CALDERON NETTLE, MAURICIO ROBERTO
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CALDERON NETTLE, MAURICIO ROBERTO
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mauriciocalderon@udd.cl
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15519296200

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2024 2024 2023 2023 2022 2022 2021 2021 0.0 0.0 0.5 0.5 1.0 1.0 1.5 1.5 2.0 2.0 2.5 2.5 3.0 3.0

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Satellite Remote Sensing Applied to Landslide Susceptibility in the Andean Cordillera (33°27'–33°55' S)

2024 , Alejandro Montenegro , Pierre-Yves Descote , José Manuel Lattus , Luis F. Robledo , Gustavo Gattica , Xaviera Palma , Sergio Carvajal , Ivo Fustos , CALDERON NETTLE, MAURICIO ROBERTO , Wen Nie , Wenbin Jian , Jean-Baptiste Gressier

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Detrital isotopic record of a retreating accretionary orogen: An example from the Patagonian Andes

2024 , F.M. Rey , M.A. Malkowski , J.C. Fosdick , S.C. Dobbs , CALDERON NETTLE, MAURICIO ROBERTO , M.C. Ghiglione , S.A. Graham

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 isotopic signatures in advancing orogens, relating compressional regimes with evolved signatures and extension with juvenile signatures; however, such frameworks may not apply for retreating orogens, which commonly produce substantial crustal heterogeneities during backarc rifting and ocean spreading. We explore the Mesozoic to Cenozoic Patagonian Andes tectonic evolution, combining U-Pb zircon ages, bulk rock εNd, and new detrital zircon εHf from the retroarc basin to understand the associated magmatic arc evolution during retreat and advance of the margin. Our results reveal a protracted phase of isotopically juvenile magmatism between 150 and 80 Ma, which began during backarc extension and persisted long after the margin switched to a contractional regime. We propose that the prolonged juvenile isotopic trend started mainly due to trenchward migration of the arc during backarc extension (150–120 Ma) and persisted due to partial melting of underthrusted juvenile attenuated and oceanic crust during backarc basin closure (120–80 Ma). This interpretation implies that tectonic stress alone does not predict isotopic trends, and factors like assimilation or the composition of underthrusted crust are important controls on magmatic isotopic composition, especially in retreating and transitional orogens.

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Late Paleozoic magmatism and foreland deformation associated with opening and closing of marginal basins in the North Patagonian Andes

2024 , C. W. Rapela , M. García , F. Hervé , R. J. Pankhurst , CALDERON NETTLE, MAURICIO ROBERTO , C. M. Fanning , S. O. Verdecchia

Remnants of coeval Devonian oceanic and continental foreland rocks are preserved in the basement of the North Patagonian Andes. Our previous studies of the igneous rocks here have shown that the primitive oceanic and continental igneous rocks are coeval and belong to a marginal basin that opened and closed over 50 Myr. A structural study and four new U–Pb SHRIMP ages and zircon Hf–O determinations allowed the identification of three metamorphic episodes, the first one of which, M 1 (D 1 -S 1 ), is coeval with Andean-type granite intrusion in the foreland (405–380 Ma). This activity was simultaneous with the development of an oceanic ridge and a marginal basin, at the outer edge of which a primitive granitic oceanic arc formed (380–385 Ma; zircon δ 18 O 3.6–5.2‰). The extinction of this ridge initiated under-thrusting of the oceanic crust below the continent and an important mid- to high-grade metamorphic event, M 2 (D 2 -S 2 ) at 375–360 Ma, its peak dated by metamorphic zircon rims in migmatite at 365 ± 3 Ma. Basin closure occurred after the intrusion of S-type granites (357 ± 2 Ma; zircon δ 18 O 7.4–10.4‰) in the foreland and the accretion of gabbros, cumulate gabbros and trondhjemites at the proto-Pacific margin. Compression prevailed for 20 Myr in the foreland, causing a mylonitic medium-grade M 3 (D 3 -S 3 ) event. Supplementary material: Datasets are available at https://doi.org/10.6084/m9.figshare.c.6989873

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Petrology and tectonic evolution of late Paleozoic mafic-ultramafic sequences and the Leones Pluton of the Eastern Andean Metamorphic Complex (46-47°S), southern Chile

2021 , D. Rojo , CALDERON NETTLE, MAURICIO ROBERTO , F. Hervé , J. Díaz , P. Quezada , R. Suárez , M.C. Ghiglione , F. Fuentes , T. Theye , J. Cataldo , J. Sándoval , T. Viefhaus

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Landslide Susceptibility Analysis Using 3D Modeling: A Case Study in San José de Maipo, Chile (33°38′S)

2023 , Diego Villalobos , Pierre-Yves Descote , Cristóbal Ramírez , CALDERON NETTLE, MAURICIO ROBERTO , Luis F. Robledo , Gustavo Gatica , Javiera Fuenzalida , Sergio Carvajal , Xaviera Palma , David Ruete , Wen Nie , Wenbin Jian

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Forearc tectonics and volcanism during the Devonian–Carboniferous evolution of the North Patagonian segment, southern Chile (41,3°S)

2022 , CAMILO JAVIER PALAPE REYES , P. Quezada , J. Bastías , F. Hervé , T. Reyes , M. Veas , F. Vildoso , CALDERON NETTLE, MAURICIO ROBERTO , T. Theye , F. Fuentes , M. Chiaradia

Late Paleozoic to early Mesozoic subduction complexes formed during the evolution of southwestern Gondwana and extensively crop out along the Chilean continental margin. Recent findings in northern Patagonia (40°–43°S) revealed that accretionary processes were active since the Devonian when enhanced lithosphere stretching in the forearc led to the formation of Chaitenia island arc. The extension in the crust consecutively developed a backarc basin, which culminated during a compressive episode that re-amalgamated the Chaitenia island arc with the margin. This episode produced intermediate grade metamorphism in the sedimentary rocks that were formed throughout the extension. To constrain the tectonic evolution of these processes, we combined petrology, structural analysis, whole-rock geochemical, and whole-rock isotopic tracing (Sr-Nd-Pb) data along with thermodynamic modelling. Two petro-tectonic domains are here defined. The Western Coastal Range Domain is composed of Carboniferous to Permian metapsammopelitic rocks, which are mainly schists with a metasedimentary Carboniferous protolith exhibiting a penetrative northeast to southwest dipping main foliation associated with basal accretion. The Eastern Coastal Range Domain is comprised by garnet micaschists, metabasalts, metarhyolites, and metasandstones. This unit is folded by three ductile structures: The first is related to rootless isoclinal folds, the second is associated with kilometric scale west-verging tight folds, and the third is associated with west-verging cylindrical folds. The volcanic rocks of this domain are comprised by middle Devonian alkaline metarhyolites and metabasalts with enriched-MORB and normal-MORB affinities. Trace element composition suggests that the metabasalts formed through shallow melting in an extensional setting over a supra-subduction zone. Nd and Pb isotope data point to a mantle source change for the basaltic melts from an EM1-like to a DM-like and are interpreted to reflect the embryonic to mature evolution of the early Devonian to Carboniferous backarc system. The calculated P–T evolution of the garnet micaschists follows: 1) a clockwise IP–IT prograde Barrovian path, 2) an isobaric thermal increase at ∼7 kbar and 540°C, and 3) an adiabatic decompression. Finally, after the metamorphism, these rocks were uplifted by thrusting processes that probably occurred during the late Permian.

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The low-grade basement at Península La Carmela, Chilean Patagonia: new data for unraveling the pre-Permian basin nature of the Eastern Andean Metamorphic Complex

2021 , D. Rojo , CALDERON NETTLE, MAURICIO ROBERTO , M. C. Ghiglione , R. J. Suárez , P. Quezada , J. Cataldo , F. Hervé , R. Charrier , G. Galaz , M. Suárez , G. Guettner , M. Babinski

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The role of physicochemical and biochemical processes on carbonate precipitation within the Laguna Timone maar in the Pali Aike Volcanic Field, southernmost extra-Andean Patagonia

2022 , Carolina Henríquez , CALDERON NETTLE, MAURICIO ROBERTO , Leonardo Fadel Cury , Gustavo Athayde , Sergio Carvajal , Poldie Oyarzún , Anelize Bahniuk

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Neogene Patagonian magmatism between the rupture of the Farallon plate and the Chile Ridge subduction

2021 , Cristóbal Ramírez de Arellano , CALDERON NETTLE, MAURICIO ROBERTO , Huber Rivera , Mauricio Valenzuela , C. Mark Fanning , Eliot Paredes

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Morphostructure of Landslides: Characterization Through Electrical Resistivity Tomography (ERT)

2023 , CALDERON NETTLE, MAURICIO ROBERTO , Fuenzalida, Javiera , Villalobos, Diego , Gatica, Gustavo , Robledo, Luis F. , Descote, Pierre-Yves , Carvajal, Sergio , Palma, Xaviera , Ramírez, Cristóbal , Fustos, Ivo , Nie, Wen , Xie, Wei

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