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  • 1
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    Orogen-scale transpression accounts for GPS velocities and kinematic partitioning in the Southern Andes (2021)
    Nature Publishing Group UK
    Details
    Publication Date: 2023-12-19
    Description: The Southern Andes are regarded as a typical subduction orogen formed by oblique plate convergence. However, there is considerable uncertainty as to how deformation is kinematically partitioned in the upper plate. Here we use analogue experiments conducted in the MultiBox (Multifunctional analogue Box) apparatus to investigate dextral transpression in the Southern Andes between 34 °S and 42 °S. We find that transpression in our models is caused mainly by two prominent fault sets; transpression zone-parallel dextral oblique-slip thrust faults and sinistral oblique-slip reverse faults. The latter of these sets may be equivalent to northwest-striking faults which were believed to be pre-Andean in origin. We also model variable crustal strength in our experiments and find that stronger crust north of 37 °S and weaker crust to the south best reproduces the observed GPS velocity field. We propose that transpression in the Southern Andes is accommodated by distributed deformation rather than localized displacements on few margin-parallel faults.
    Description: Upper crustal transpression in the Southern Andes is mainly accommodated by widespread deformation on oblique-slip reverse and thrust faults, according to a comparison of scaled analogue models with the observed GPS velocity field and fault patterns.
    Description: Deutsche Forschungsgemeinschaft (German Research Foundation) https://doi.org/10.13039/501100001659
    Description: https://doi.org/10.5880/fidgeo.2021.023
    Keywords: ddc:550.729 ; Structural geology ; Tectonics ; southern Andes ; transpression ; modelling
    Language: English
    Type: doc-type:article
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
  • 2
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    Kinematic partitioning in the Southern Andes (39° S–46° S) inferred from lineament analysis and reassessment of exhumation rates (2021)
    Springer Berlin Heidelberg
    Details
    Publication Date: 2023-07-27
    Description: The Southern Andes are often viewed as a classic example for kinematic partitioning of oblique plate convergence into components of continental margin-parallel strike-slip and transverse shortening. In this regard, the Liquiñe-Ofqui Fault Zone, one of Earth’s most prominent intra-arc deformation zones, is believed to be the most important crustal discontinuity in the Southern Andes taking up margin-parallel dextral strike-slip. Recent structural studies, however, are at odds with this simple concept of kinematic partitioning, due to the presence of margin-oblique and a number of other margin-parallel intra-arc deformation zones. However, knowledge on the extent of such zones in the Southern Andes is still limited. Here, we document traces of prominent structural discontinuities (lineaments) from the Southern Andes between 39° S and 46° S. In combination with compiled low-temperature thermochronology data and interpolation of respective exhumation rates, we revisit the issue of kinematic partitioning in the Southern Andes. Exhumation rates are maximal in the central parts of the orogen and discontinuity traces, trending predominantly N–S, WNW–ESE and NE–SW, are distributed across the entire width of the orogen. Notably, discontinuities coincide spatially with large gradients in Neogene exhumation rates and separate crustal domains characterized by uniform exhumation. Collectively, these relationships point to significant components of vertical displacement on these discontinuities, in addition to horizontal displacements known from published structural studies. Our results agree with previously documented Neogene shortening in the Southern Andes and indicate orogen-scale transpression with maximal vertical extrusion of rocks in the center of the transpression zone. The lineament and thermochronology data call into question the traditional view of kinematic partitioning in the Southern Andes, in which deformation is focused on the Liquiñe-Ofqui Fault Zone.
    Description: Deutsche Forschungsgemeinschaft
    Description: Universität Hamburg (1037)
    Keywords: ddc:551.8 ; Kinematic partitioning ; Liquiñe-Ofqui Fault Zone ; Southern Andes ; Transpression
    Language: English
    Type: doc-type:article
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
  • 3
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    Bottom water analysis of MUC samples from SONNE cruise SO270 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Keywords: Alkalinity, total; Autoanalyzer (SKALAR SAN plus System/08529); Carbon dioxide, total; Date/Time of event; Density; Elevation of event; Event label; Latitude of event; Longitude of event; MASACARA; MASCARA; MUC; MultiCorer; Phosphate; RV Sonne cruise SO270; Salinity; Saya de Malha Bank; Silicate; SO270; SO270_11-5; SO270_12-3; SO270_13-3; SO270_14-2; SO270_16-3; SO270_19-3; SO270_40-4; SO270_45-3; SO270_46-3; SO270_47-3; SO270_49-4; SO270_53-2; SO270_54-4; SO270_55-3; SO270_56-3; SO270_59-7; SO270_64-7; SO270_75-3; SO270_82-5; Sonne_2; Temperature, water; VINDTA 3C for AT and Dissolved Inorganic Carbon measurement
    Type: Dataset
    Format: text/tab-separated-values, 133 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Physical oceanography (CTD) during SONNE cruise SO270 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Keywords: Alkalinity, total; Autoanalyzer (SKALAR SAN plus System/08529); Bottle number; Carbon, inorganic, dissolved; CTD, Sea-Bird SBE 911plus; CTD/Rosette; CTD-RO; DATE/TIME; Density; Density, sigma-theta (0); DEPTH, water; Event label; Fluorescence; LATITUDE; LONGITUDE; MASACARA; MASCARA; Oxygen; Phosphate; Pressure, water; Radiation, photosynthetically active/Irradiance ratio; RV Sonne cruise SO270; Salinity; Saya de Malha Bank; SEIS; Seismic; Silicon; SO270; SO270_1-1; SO270_11-1; SO270_12-1; SO270_13-1; SO270_14-1; SO270_16-1; SO270_19-1; SO270_2-1; SO270_23-1; SO270_24-1; SO270_25-1; SO270_27-1; SO270_3-1; SO270_39-1; SO270_40-1; SO270_4-1; SO270_41-1; SO270_45-1; SO270_49-1; SO270_5-1; SO270_54-1; SO270_55-1; SO270_56-1; SO270_57-1; SO270_59-1; SO270_6-1; SO270_61-1; SO270_64-1; SO270_68-1; SO270_7-1; SO270_7-4; SO270_80-1; SO270_82-1; SO270_88-1; SO270_90-1; SO270_91-1; SO270_92-1; SO270_93-1; Sonne_2; Temperature, water; Temperature, water, potential; Turbidity (Nephelometric turbidity unit); VINDTA 3C for AT and Dissolved Inorganic Carbon measurement
    Type: Dataset
    Format: text/tab-separated-values, 8937 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    SUNDANS underway data from SONNE cruise SO270 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Keywords: Alkalinity, total; DATE/TIME; Fluorescence; Fugacity of carbon dioxide in seawater; LATITUDE; LONGITUDE; MASACARA; MASCARA; Oxygen; Oxygen optode, Aanderaa type 3835; RV Sonne cruise SO270; Salinity; Saya de Malha Bank; SO270; SO270_0_Underway; Sonne_2; SUNDANS; Temperature, water; UMS; Underway, multiple sensors; VINDTA 3C for AT and Dissolved Inorganic Carbon measurement
    Type: Dataset
    Format: text/tab-separated-values, 247218 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Pore waters analysis of MUC samples from SONNE cruise SO270 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Keywords: Ammonium; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; Latitude of event; Longitude of event; MASACARA; MASCARA; MUC; MultiCorer; Nitrate; Nitrite; Number; Phosphate; Plate reader,TECAN, Infinite F200 PRO; RV Sonne cruise SO270; Saya de Malha Bank; Silicate; SO270; SO270_11-5; SO270_12-3; SO270_13-3; SO270_14-2; SO270_16-3; SO270_19-3; SO270_40-4; SO270_46-3; SO270_47-3; SO270_49-4; SO270_53-2; SO270_55-3; SO270_56-3; SO270_59-7; SO270_63-2; SO270_75-3; SO270_82-5; Sonne_2
    Type: Dataset
    Format: text/tab-separated-values, 1224 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Carbonate chemistry of SONNE cruise SO270 (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-26
    Description: The main objective of the RV Sonne cruise SO270 was to test the hypothesis that Saya de Malha Bank (SMB) is a carbonate platform controlled by water mass boundaries and currents which exert a strong control on sedimentation, ecosystems and biogeochemistry. The proposed project 'Saya de Malha Bank Carbonate Geochemistry – MASCARA Geochemie' contributes to the overarching goal by characterizing the biogeochemical properties of water masses in order to estimate the impact of water masses on the aragonite and calcite saturation state. To achieve the project aims, carbonate chemistry was determined in surface waters by using an underway system (SUNDANS and VINDTA 2C, both instruments are from Marianda, Kiel, Germany). Furthermore, a CTD/Rosette sampler and a multi-corer (MUC ) was used to sample the water column and pore water whereas in addition pore water also the MUC-supernatant was sampled. The underway data include: salinity, sea water temperature, fugacity of CO2 (fCO2) concentrations of dissolved oxygen, chlorophyll (fluorescence) and total alkalinity (TA). Concentrations of nutrients (PO43- and SiOH4-), total dissolved inorganic carbon (DIC) and TA were determined in water samples obtained from CTD/Rosette sampler and within the MUC-supernatant, by using a SKALAR SAN plus System/08529 and a VINDTA 3C system (#29, Marianda, Kiel, Germany). Pore water nutrient concentrations (NOx, NO2-, NH4+, PO43- and SiOH4-) were measured by using a TECANinfiniteF200pro.
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Water column raw data (Kongsberg EM 122 entire dataset) of RV SONNE during cruise SO270 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Description: Water column raw data using the ship's own Kongsberg EM 122 multibeam echosounder was not continuously recorded during RV SONNE cruise SO270. Data was only recorded on 4 days between 2019-10-04 and 2019-10-22 in the Indian Ocean at the Saya de Malha Bank / Sommerville Bank. The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication. Ancillary sound velocity profiles (SVP) files from the cruise are archived at the BSH and added to the corresponding multibeam raw dataset doi:10.1594/PANGAEA.954993 This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM).
    Keywords: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; Event label; Extracted from file; Extracted with MB-System; File content; Kongsberg datagram raw file name; Kongsberg EM122 Multibeam Echo Sounder; LATITUDE; LONGITUDE; MASCARA; Multibeam Echosounder; Number of pings; Ship speed; SO270; SO270_0_Underway-2; Sonne_2; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude; Water Column Data
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Multibeam bathymetry raw data (Kongsberg EM710 entire dataset) of RV SONNE during cruise SO270 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Description: Multibeam bathymetry raw data using the ship's own Kongsberg EM 710 multibeam echosounder was not continuously recorded during RV SONNE cruise SO270. Data was recorded on 26 days between 2019-09-23 and 2019-10-19. This dataset a survey data covering the Saya de Malha Bank and Sommerville Bank with shallow water depth. The approximate average depth of the entire dataset is around 300m. The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication. Ancillary sound velocity profiles (SVP) files from the cruise are archived at the BSH, thus SVP files are added to this dataset. Also data analysis of the multibeam raw data revealed that SVP has been changed during the survey. This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM). Data are unprocessed and therefore contains incorrect depth measurements (artifacts) without further processing. Note that refraction errors can be expected due to the lack of proper SVP. Overall, it appears that the data quality is rather good since the gridded hillshade data showed relatively few obstacles. Data can be processed e.g. with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022).
    Keywords: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; EM710; EM710 multibeam echosounder; Event label; Expendable Sound Velocimeter; Extracted from file; Extracted with MB-System; File content; Kongsberg datagram raw file name; LATITUDE; LONGITUDE; MASCARA; Multibeam Echosounder; Number of pings; Ship speed; SO270; SO270_0_Underway-3; SO270_10-1; SO270_22-1; SO270_22-2; SO270_58-2; SO270_84-2; SO270_9-1; Sonne_2; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude; XSV
    Type: Dataset
    Format: text/tab-separated-values, 6404 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV SONNE during cruise SO270 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Description: Multibeam bathymetry raw data using the ship's own Kongsberg EM 122 multibeam echosounder was almost continuously recorded during RV SONNE cruise SO270. Data was recorded on 40 days between 2019-09-13 and 2019-10-22. This dataset contains an elongated transit survey in the Indian Ocean over the Mid-Idian Ocean Basin also crossing the Fuji Seamount (mainly deep sea area's). In addition, this dataset contains survey data from the Saya de Malha Bank and Sommerville Bank with shallow water depth. The approximate average depth of the entire dataset is around 4100m. The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication. Ancillary sound velocity profiles (SVP) files from the cruise are archived at the BSH, thus SVP files are added to this dataset. Also data analysis of the multibeam raw data revealed that SVP has been changed during the survey. This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM). Data are unprocessed and therefore contains incorrect depth measurements (artifacts) without further processing. Note that refraction errors can be expected due to the lack of proper SVP. Overall, it appears that the data quality is rather good since the gridded hillshade data showed relatively few obstacles. Data can be processed e.g. with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022).
    Keywords: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Data file recording distance; Data file recording duration; DATE/TIME; ELEVATION; Event label; Expendable Sound Velocimeter; Extracted from file; Extracted with MB-System; File content; Kongsberg datagram raw file name; Kongsberg EM122 Multibeam Echo Sounder; LATITUDE; LONGITUDE; MASCARA; Multibeam Echosounder; Number of pings; Ship speed; SO270; SO270_0_Underway-2; SO270_10-1; SO270_22-1; SO270_31-2; SO270_58-2; SO270_84-2; SO270_9-1; Sonne_2; Start of data file, depth; Start of data file, heading; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file, depth; Stop of data file, heading; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude; XSV
    Type: Dataset
    Format: text/tab-separated-values, 13604 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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