Core-Log Integration of Natural Gamma Ray Intensity to Construct a 10-m.y. Continuous Sedimentary Record off Sanriku, Western Pacific Margin, ODP Sites 1150 and 1151

Scientific Drilling

“…Additionally, there is a history through Deep Sea Drilling Project (DSDP)/ODP/ IODP of downhole logging with NGR tools (Gealy, 1973;Hoppie et al, 1994;Blum et al, 1997;Sakamoto et al, 2003). However, the shipboard NGR system used prior to 2009 often required excessive NGR measurement time in order to produce reliable counting statistics, and hence conflicted with the flow of core processing otherwise imposed by the shipboard operations.…”

Assessment and Use of NGR Instrumentation on the <i>JOIDES Resolution</i> to Quantify U, Th, and K Concentrations in Marine Sediment

“…Since 1993, an NGR system on the Ocean Drilling Program (ODP)/Integrated Ocean Drilling Program (IODP) drillship JOIDES Resolution has successfully been measuring NGR emitted by marine sediment and rocks of varying lithologies (Blum et al, 1997). Additionally, there is a history through Deep Sea Drilling Project (DSDP)/ODP/ IODP of downhole logging with NGR tools (Gealy, 1973;Hoppie et al, 1994;Blum et al, 1997;Sakamoto et al, 2003). However, the shipboard NGR system used prior to 2009 often required excessive NGR measurement time in order to produce reliable counting statistics, and hence conflicted with the flow of core processing otherwise imposed by the shipboard operations.…”