https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36395 Wed 08 Apr 2020 15:20:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:36047 2- to depths >1,500 m. Thermally driven diagenesis, which would cause extensive loss of greigite at these depths, does not appear to be significant here. Multidomain magnetite grains dominate the magnetic mineralogy in the deepest part of the sequence, but some single-domain magnetite survives as inclusions in silicates. Fluid anomalies representing sulfate influx drive locally renewed greigite authigenesis, as do methane and ethane accumulations. In some cases, where methane is accompanied by H₂S ("sour gas"), fine-grained greigite is converted to pyrite. We term these multiple episodes of enhanced magnetic mineral alteration "punctuated magnetic mineral diagenesis." Despite both progressive and punctuated magnetic mineral diagenesis, enough depositional remanence survives to allow recognition of the magnetostratigraphy to 1,320 m below seafloor.]]> Thu 30 Jan 2020 16:34:09 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34030 Fri 03 Apr 2020 16:33:42 AEDT ]]>