M. Sánchez’s research while affiliated with University of London and other places

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Publications (1)

Fig. 1. Map showing the major geological provinces and geotectonic elements of Patagonia. In the Eastern part of the Deseado Region the square area shows the location of the study area. Keys: SJB: San Julián Basin; NMB: North Malvinas Basin; MB: Malvinas Basin.
Table 1 Summary describing the main features of the vein systems described in the text.
Fig. 2. Chart displaying major tectonic events of the Eastern Deseado Region and proposed tectonic regimes. Based on Cortiñas et al. (2005), Fracchia and Giacosa (2006), Giacosa et al. (2006, 2008a,b), Homovc and Constantini (2001), Peroni et al. (1995). Keys: Maximum Shortening (Z) and Maximum Stretching directions (X).  
Table 2 Summary description of the Meso-Cenozoic tectonic phases of the Eastern Deseado Region.
Fig. 5. Seismic sections and structural interpretation. References lines in Fig. 3. A, Line 7678: Notice that the sin-extensional Permian-Triassic and middle Jurassic units develop growth strata towards the main structure (Roca Blanca South Fault). The former normal fault presents a major extension-related roll-over anticline and a listric geometry. Probably generated due to Cretaceous compression a tight hangingwall inversion anticline formed between the main fault trace and planar antithetic faults. B, Line 7678: Shows an N-dipping major WNW fault accompanied by planar antithetic faults. We interpret that the doming morphology has been generated by the Cretaceous inversion. Keys: LMPz-MIR (Lower to Middle Paleozoic Metamorphic and Igneous rocks); PT-SR (Permian-Triassic Sedimentary rocks); TEJ-SR (Triassic-Early Jurassic Sedimentary rocks); EJ-SR (Early Jurassic Sedimentary rocks); MJ-BR (Middle Jurassic Basaltic rocks); ML-RR (Middle-Late Rhyolitic Rhyolitic rocks); K-SR (Lower Cretaceous Sedimentary rocks).  

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Meso-Cenozoic tectonics of the southern Patagonian foreland: Structural evolution and implications for Au–Ag veins in the eastern Deseado Region (Santa Cruz, Argentina)
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December 2010

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1,229 Reads

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103 Citations

Journal of South American Earth Sciences

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M. Sánchez

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Located in the centre of the Argentinean Patagonia between 46° and 49°S, the Deseado Region represents the foreland domain of the Southern Patagonian Andes. Its geology is characterized by thick Mesozoic sequences which, at its eastern sector, present a Mesozoic and Cenozoic geologic evolution which has been strongly determined by the development of three major tectonic phases. The present research is based on field geological mapping, interpretation of seismic and aeromagnetic data, as well as satellite image analysis. This approach has allowed us to identify and characterize the deformation that occurred throughout Jurassic, Cretaceous and Miocene times. We interpret that the most relevant structural features are the result of normal faulting generated as a response to the Jurassic rifting stage. These extensional features have strongly influenced the subsequent geometry and distribution of younger Cretaceous and Cenozoic structures.

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Citations (1)

... Changes in the temperature field of rocks can reflect the distribution and activity of heat sources in the crust, revealing the dynamic processes in the deep underground, especially in the study of tectonic belts, volcanic belts, and regions with heat flow anomalies [5,6]. Accurate prediction of the rock temperature field can better understand the interaction between tectonic changes and thermodynamic processes, providing a reliable theoretical basis for geological disaster prediction, resource exploration, and energy development [7][8][9][10][11][12][13]. More importantly, the study of rock temperature response provides an important research window for revealing the evolution of deep underground materials, the relationship between thermodynamic and mechanical processes, and the long-term dynamics of crustal evolution. ...

Reference:

Thermodynamic-Based Rock Temperature Response and Geological Structure Evolution Simulation
Meso-Cenozoic tectonics of the southern Patagonian foreland: Structural evolution and implications for Au–Ag veins in the eastern Deseado Region (Santa Cruz, Argentina)

Journal of South American Earth Sciences

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M. Sánchez

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