Table 4. Summary of logging tool specifics and their applications on Leg 164.

Tool	Acronym	Principle	Synthetic seismogram	Lithology mineralogy	Porosity	Gas hydrate saturation	Used Leg 164	Typical data available on ship
								
Sonic	LSS/SDT	Traveltime of sound	G	F	G	G	Y	
	BHC		G	F	G	G	N	
	SDT-C		VG	F	G	G	Y	Velocity-Vp
	LDEO-SST		VG	F	G	G	Y	Velocity-Vp, Vs
								
Resistivity	DITE							
    Shallow	SFL	Focused current	F	F	VG	F	Y	Resistivity
    Medium	ILM	Induced current	F	F	VG	F	Y	Resistivity
    Deep	ILD	Induced current	F	F	VG	G	Y	Resistivity
								
Gamma-ray	GR	Natural gamma-ray emissions	P	VG			Y	Gamma-ray counts
								
Caliper	MCD	Hole diameter		P			N	
								
Dual laterolog	DLL	Resistivity to current		P		G	N	
								
Neutron porosity	CNT-G	Absorption of bombarding neutrons	P	F	VG		Y	Porosity
								
Natural gamma-ray	NGT	Natural gamma-ray emissions	P	VG			Y	K, Th, U abundances
								
Lithodensity	HLDT	Absorption of bombarding gamma rays	G	G	G		Y	Density
								
Induced gamma-ray spectroscopy	GST	Capture of bombarding neutrons	F	VG	F	G	Y	Elemental yields
								
Al activation clay tool	AACT	Absorption of bombarding neutrons	P	F	P		Y	Aluminum abundance
								
Formation MicroScanner	FMS	Focused microcurrent	P	P	G	P	Y	Resistivity images
								
Temperature	LDEO-TLT	Formation temperature	P	F		P	Y	Temperature

Note: Tool acronyms same as in Table 3, this chapter. Additional acronyms: LSS = long-spaced sonic tool, BHC = borehole compensated sonic logging tool, GR = natural gamma-ray logging tool, MCD = caliper tool, and DLL = dual laterolog.
VG = very good, G = good, F = fair, and P = poor. Y = yes, and N = no.