trace_metals_p

 PI:             John Martin
 dataset:        Particulate Trace Metals filtered at 0.4um
 project/cruise: EQPAC/TT008
 ship:           Thomas Thompson


 Parameter   Description                                            Units

 event       event/operation number per event log                    
 depth_n     depth of sample                                        meters
 date        date reported as YYMMDD, year 1992                      
 time        time of day reported as local ship time                hours and minutes
 lat_n       nominal latitude; negative for south                   whole degrees
 lon_n       nominal longitude; negative for west                   whole degrees
 Al_total    sum of aluminium from leach and refractory portions    nanomoles per kilogram
 Al_leach    aluminium extracted with a 25% acetic acid leach       nanomoles per kilogram
 Al_ref      refractory aluminium from total digestion              nanomoles per kilogram
 Fe_total    sum of iron from leach and refractory portions         nanomoles per kilogram
 Fe_leach    iron extracted with a 25% acetic acid leach            nanomoles per kilogram
 Fe_ref      refractory iron from total digestion                   nanomoles per kilogram
 Mn_total    sum of manganese from leach and refractory portions    nanomoles per kilogram
 Mn_leach    manganese extracted with a 25% acetic acid leach       nanomoles per kilogram
 Mn_ref      refractory manganese from total digestion              nanomoles per kilogram

 () indicates that sample is contaminated
  < indicates value below detection limit, value is less than number indicated