BX-700 Box Corer

Description

A compact geochemical box corer that has a number of unique modifications and changes that have been made in the design to make at-sea operations both time and cost effective.  The BX-700 is a modification on an original design developed by Andy Soutar of Scripps Institution of Oceanography that has been extensively used in organic carbon, texture and trace metals research since the mid-1970s. The Compact Corer provides undisturbed sediment samples with easy access for immediate inspection and has no restrictions on the depths that it can be used.

The compact corer features a removable box and adjustable weight pack consisting of 12 lead weights.

Standard features include:

  • a specially designed flow-through box to reduce corer bow wake effect
  • Teflon® slides for smooth corer penetration
  • adjustable penetration limit stops
  • pre-trip safety pin

The compact frame size facilitates the use of this corer on smaller vessels of approximately eight meters or greater with A-Frame clearances of as little as 155cm. Small capacity winches and lightweight cable can be safely used to raise and lower the corer.

Specifications

Material: Aluminum (6061-T6) Stainless steel fasteners (type 304)

Box Material: Standard box 6061-T6, optional 304 stainless available

Weight: 312 kilos

Height: 155 cm (tripped condition)

Deck Footprint: 110 cm X 110 cm

Box area:  25.4cm x 25.4cm x 60cm

Sampling area: 0.062 m2

Category Description

Box Corers are used to sample soft sediments in lakes and oceans. The corer is lowered vertically until it impacts with the seabed. At this point the instrument is triggered by a trip as the main coring stem passes through its frame. While pulling the corer out of the sediment the spade swings underneath the sample to prevent loss. The recovered sample is completely enclosed after sampling, reducing the loss of finer materials during recovery. Stainless steel doors, kept open during the deployment to reduce any “bow-wave effect” during sampling, are triggered on sampling and remain tightly closed, sealing the sampled water from that of the water column. On recovery, the sample can be processed directly through the large access doors or via the removal of the box completely, together with its cutting blade.

A properly designed and operated box corer is suitable for collecting zoo- benthos (Gage & Tyler 1991, Paterson et al. 1998), surficial sediments (McCave 1985, Ekeroth et al. 2012) and surface concretions (Hessler & Jumars 1974, Veillette et al. 2007). A box corer can also be used for sub-coring to minimize core shortening or for taking replicate subsamples (Blomqvist & Boström 1987).

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