Publication Date:
2020-07-30
Description:
Based on sediment physical property data from DSDP/ ODP Legs 78A and 110 (Barbados Ridge Complex), a simple palinspastic reconstruction scheme was employed to study porosity changes during accretion. Undoing the compactional effects caused by imbricate stacking of wedge slices, a synthetic pre-accretion porosity depth profile was developed, which bears strong resemblence to a characteristic profile from a reference drillhole in front of the Barbados accretionary complex. Differences between synthetic and reference profile are interpreted in terms of a semiquantitative estimate of the relative impact of the horizontal stress component on gravitational compaction in accretionary wedge environments. An exponential relationship between depth and porosity divergence for distinct lithologic units is evident. The defined relationship facilitates the analysis of deformational behavior of accreted sediments in general.
Type:
Article
,
PeerReviewed
Format:
text
