Apatite fission crack data from the Eisenhauer Range, Antarctica ...

• Main Authors: Prenzel, Jannis, Lisker, Frank, Elsner, Martin, Schöner, Robert, Balestrieri, Maria Laura, Läufer, Andreas, Berner, Ulrich, Spiegel, Cornelia
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Andreas; Antarctic; Arctic; Eisenhower Range; Ross Sea; Transantarctic Mountains; Antarc*; Antarctica; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.868481; https://doi.pangaea.de/10.1594/PANGAEA.868481

The Eisenhower Range is a N-S trending mountain range in the Transantarctic Mountains (TAM) adjacent to the NW Ross Sea Embayment. New AFT and apatite (U-Th-Sm)/He (AHe) data from vertical basement profiles supplemented by paleotemperature and pressure estimates derived from Beacon sandstones provide new quantitative results on regional burial evolution and first regional constraints on basin inversion and exhumation processes. AFT ages between 32 ± 2 and 259 ± 18 Ma and AHe ages of 37 ± 3-173 ± 16 Ma correlate positively with sample elevations. Thermal history modeling of these data and complementary thermal indications detect heating of the paleosurface on the Eisenhower Range to temperatures >= 80 °C subsequent to Ferrar magmatism, and constrain Late Eocene rapid cooling. Regression of modeled paleotemperatures against sample elevations refers to a high Jurassic (~ 45 °C/km) and a moderate Cretaceous-Eocene (28 ± 8 °C/km) geothermal gradient. The texture of Beacon sandstones supports strong mechanical ... : Supplement to: Prenzel, Jannis; Lisker, Frank; Elsner, Martin; Schöner, Robert; Balestrieri, Maria Laura; Läufer, Andreas; Berner, Ulrich; Spiegel, Cornelia (2014): Burial and exhumation of the Eisenhower Range, Transantarctic Mountains, based on thermochronological, sedimentary rock maturity and petrographic constraints. Tectonophysics, 630, 113-130 ...