Modeling of WEPAPIS-60 (Western Pacific Paleointensity-Stacking for the Last 60 kyr)

Abstract:

Paleointensity stacking (PIS) for Western Pacific was carried out using 6 core data from the region. This region was area selected because (1) data from this area has not been represented in the previous PIS; (2) this region has many subductions zones so it can be used to try to prove the influence of hematite minerals in the subduction zone to paleointensity; (3) there is a high-resolution RPI from Lake Towuti which can be used as a reference curve in processing. PIS model made by 4 stages, which are selecting core data from Western Pacific area, normalizing intensity values, interpolating intensity value, and stacking core data. Stacking done with three weighting variations and the resulting model will be referred as WEPAPIS-60 (Western Pacific Paleointensity Stacking for the last 60 kyr). The results obtained can show the pattern of low-intensity values in 41 kyr (Laschamp excursion), 34 kyr (Mono Lake excursion), and the range of 10-20 kyr (which may be related to a young series excursion).