chemistry_sed

 PI:               D.J. DeMaster
 of:               North Carolina State University
 dataset:          Sediment chemistries
 project/cruise:   EqPac/TT013, Benthic survey
 ship:             R/V Thomas Thompson

 Methodology:
 Pope, R.H., D.J. DeMaster, C.R. Smith and H. Seltmann Jr, 1996.  Rapid 
 bioturbation in equatorial Pacific sediments: evidence from excess
 234Th measurements.  Deep-Sea Research II, vol. 43, No. 4-6, pp 1339-1364.

 Summary Tables (MS Excel spread sheet files), as provided by the submitting PI, 
 of core specific radiochemical data and derived sediment accumulation rates 
 can be downloaded. 


  Parameter        Description                             Units

  event            event number from event log             dimensionless
  sta              station number from event log           dimensionless
  lat_n            nominal latitude, negitave indicates    degrees
                   south
  lon_n            nominal longitude, negative indicates   degrees
                   west
  core_type        type and number of core, core type      dimensionless  
                   encoded as follows        
                   BC means box core
                   MC means multi core
  tube_num         tube or subcore number(s) from a multi  dimensionless
                   core device
  depth_core       depth in core, mid-point of interval    centimeters
                   sampled
  depth_r          depth range/interval sampled            centimeters
  MLD_sed          Mixed Layer Depth in sediments, the     centimeters
                   zone of active biological disturbance 
                   i.e.  mixing
  C_org            organic carbon in sediments             weight percent
  CaCO3            calcium carbonate in sediments          weight percent
  Si_bio           biogenic silica in sediments            weight percent