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Core Description area on the Core Deck.





Overview

A description of each core recovered on the JR is among the primary deliverables of the shipboard science party. Core describers are also responsible for other tasks related to description, including instrument measurements, sampling of core sections, and general core handling. The core description team typically includes 5-10 scientists, and up to 15 have sailed on expedition with ambitious description objectives. Depending on the types of sediments or rocks cored, the scientists involved in core description may include sedimentologists, petrologists, or structural geologists. The main duties include

  • Macroscopic visual description of split cores
  • Microscopic observations from

    materials expected, specialists in sedimentology, igneous petrology, metamorphic petrology, volcanology and/or structural geology may be included.

    Tasks that core describers are fully responsible for, or may be assisting technical staff with:

    • Section half preparation
    • Whole-round and section half imaging
    • Measurement of diffuse color reflectance and magnetic susceptibility
    • Macroscopic description of section halves, including structural measurements as appropriate
    • Microscopic description of smear slides and thin sections
    • Description and measurement of deformational structures
    • Preliminary interpretation of depositional, diagenetic, or deformational processes
    • Selection of samples for shipboard analyses
    • Acquisition of data with split-core tracks, including digital images, diffuse color reflectance, and magnetic susceptibility

    DESClogik core and fossil description application

    Section half preparation


    Video Tutorials (Windows Media Player)

    Section Half Imaging Logger (SHIL)

    Section Half Multisensor Logger (SHMSL)

    Scanning Electron Microscope (SEM)

    Minolta Spectrophotometer