@article{RodriguezPicedaScheckWenderothBottetal.2022,
  author    = {Rodriguez Piceda, Constanza and Scheck-Wenderoth, Magdalena and Bott, Judith and Gomez Dacal, Maria Laura and Cacace, Mauro and Pons, Michael and Prezzi, Claudia and Strecker, Manfred},
  title     = {Controls of the Lithospheric Thermal Field of an Ocean-Continent Subduction Zone},
  series = {Lithosphere / Geological Society of America},
  volume    = {2022},
  journal   = {Lithosphere / Geological Society of America},
  number    = {1},
  publisher = {GeoScienceWorld},
  address   = {McLean},
  issn      = {1941-8264},
  doi       = {10.2113/2022/2237272},
  pages     = {26},
  year      = {2022},
  abstract  = {In an ocean-continent subduction zone, the assessment of the lithospheric thermal state is essential to determine the controls of the deformation within the upper plate and the dip angle of the subducting lithosphere. In this study, we evaluate the degree of influence of both the configuration of the upper plate (i.e., thickness and composition of the rock units) and variations of the subduction angle on the lithospheric thermal field of the southern Central Andes (29 degrees-39 degrees S). Here, the subduction angle increases from subhorizontal (5 degrees) north of 33 degrees S to steep (similar to 30 degrees) in the south. We derived the 3D temperature and heat flow distribution of the lithosphere in the southern Central Andes considering conversion of S wave tomography to temperatures together with steady-state conductive thermal modeling. We found that the orogen is overall warmer than the forearc and the foreland and that the lithosphere of the northern part of the foreland appears colder than its southern counterpart. Sedimentary blanketing and the thickness of the radiogenic crust exert the main control on the shallow thermal field (<50km depth). Specific conditions are present where the oceanic slab is relatively shallow (<85 km depth) and the radiogenic crust is thin. This configuration results in relatively colder temperatures compared to regions where the radiogenic crust is thick and the slab is steep. At depths >50km, the temperatures of the overriding plate are mainly controlled by the mantle heat input and the subduction angle. The thermal field of the upper plate likely preserves the flat subduction angle and influences the spatial distribution of shortening.},
  language  = {en}
}
@article{RodriguezPicedaScheckWenderothCacaceetal.2022,
  author    = {Rodriguez Piceda, Constanza and Scheck-Wenderoth, Magdalena and Cacace, Mauro and Bott, Judith and Strecker, Manfred},
  title     = {Long-Term Lithospheric Strength and Upper-Plate Seismicity in the Southern Central Andes, 29 degrees-39 degrees S},
  series = {Geochemistry, geophysics, geosystems},
  volume    = {23},
  journal   = {Geochemistry, geophysics, geosystems},
  number    = {3},
  publisher = {American Geophysical Union},
  address   = {Washington},
  issn      = {1525-2027},
  doi       = {10.1029/2021GC010171},
  pages     = {22},
  year      = {2022},
  abstract  = {We examined the relationship between the mechanical strength of the lithosphere and the distribution of seismicity within the overriding continental plate of the southern Central Andes (SCA, 29 degrees-39 degrees S), where the oceanic Nazca Plate changes its subduction angle between 33 degrees S and 35 degrees S, from subhorizontal in the north (<5 degrees) to steep in the south (similar to 30 degrees). We computed the long-term lithospheric strength based on an existing 3D model describing variations in thickness, density, and temperature of the main geological units forming the lithosphere of the SCA and adjacent forearc and foreland regions. The comparison between our results and seismicity within the overriding plate (upper-plate seismicity) shows that most of the events occur within the modeled brittle domain of the lithosphere. The depth where the deformation mode switches from brittle frictional to thermally activated ductile creep provides a conservative lower bound to the seismogenic zone in the overriding plate of the study area. We also found that the majority of upper-plate earthquakes occurs within the realm of first-order contrasts in integrated strength (12.7-13.3 log Pam in the Andean orogen vs. 13.5-13.9 log Pam in the forearc and the foreland). Specific conditions characterize the mechanically strong northern foreland of the Andes, where seismicity is likely explained by the effects of slab steepening.},
  language  = {en}
}
@article{FreymarkBottCacaceetal.2019,
  author    = {Freymark, Jessica and Bott, Judith and Cacace, Mauro and Ziegler, Moritz 0. and Scheck-Wenderoth, Magdalena},
  title     = {Influence of the Main Border Faults on the 3D Hydraulic Field of the Central Upper Rhine Graben},
  series = {Geofluids},
  journal   = {Geofluids},
  publisher = {Wiley-Hindawi},
  address   = {London},
  issn      = {1468-8115},
  doi       = {10.1155/2019/7520714},
  pages     = {21},
  year      = {2019},
  abstract  = {The Upper Rhine Graben (URG) is an active rift with a high geothermal potential. Despite being a well-studied area, the three-dimensional interaction of the main controlling factors of the thermal and hydraulic regime is still not fully understood. Therefore, we have used a data-based 3D structural model of the lithological configuration of the central URG for some conceptual numerical experiments of 3D coupled simulations of fluid and heat transport. To assess the influence of the main faults bordering the graben on the hydraulic and the deep thermal field, we carried out a sensitivity analysis on fault width and permeability. Depending on the assigned width and permeability of the main border faults, fluid velocity and temperatures are affected only in the direct proximity of the respective border faults. Hence, the hydraulic characteristics of these major faults do not significantly influence the graben-wide groundwater flow patterns. Instead, the different scenarios tested provide a consistent image of the main characteristics of fluid and heat transport as they have in common: (1) a topography-driven basin-wide fluid flow perpendicular to the rift axis from the graben shoulders to the rift center, (2) a N/NE-directed flow parallel to the rift axis in the center of the rift and, (3) a pronounced upflow of hot fluids along the rift central axis, where the streams from both sides of the rift merge. This upflow axis is predicted to occur predominantly in the center of the URG (northern and southern model area) and shifted towards the eastern boundary fault (central model area).},
  language  = {en}
}