Table 1 Average values for the CO2/Rb, CO2/Ba and CO2/Nb ratios.

From: Heterogeneity in mantle carbon content from CO2-undersaturated basalts

 

CO 2 /Rb

CO 2 /Ba

CO 2 /Nb

Equatorial MIs

1105±104

97±10

557±79

Equatorial glasses

320±14

30±2

162±8

Siqueiros MIs (ref. 4)

1219±NA

100±22

239±46

Siqueiros glasses4

NA

68±NA

224±45

Popping Rock2

899±91

76±8

556±56

undersaturated ultradepleted MORB glasses13

1207±633

89±39

249±48

global average for MORB glasses13

NA

105±9

607±327

  1. For the equatorial melt inclusions/glasses, the Siqueiros melt inclusions/glasses and the undersaturated ultradepleted MORB glasses, the 1 s.d. uncertainty is the standard deviation over the entire population of melt inclusions. For the popping rock, the uncertainty is calculated using the standard deviation over three measurements of CO2 content2 and a conservative error of 10% relative for trace elements.
Back to article page