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Progress in Earth and Planetary Science

Table 1 IR and Raman parameters for analyzed carbonaceous clots

From: FTIR microspectroscopy of carbonaceous matter in ~ 3.5 Ga seafloor hydrothermal deposits in the North Pole area, Western Australia

Sample #

Spot #

Microphotograph

IR

Raman

Abs at ~ 2960 cm−1

Abs at ~ 2925 cm−1

Abs at ~ 2850 cm−1

R 3/2

I1350/I1600

A1350/A1600

FWHM1350

FWHM1600

N

96NP452

#1

Figure 2a

0.0024 ± 0.0003

0.0062 ± 0.0005

0.0043 ± 0.0000

0.38 ± 0.02

1.54 ± 0.07

2.21 ± 0.06

65.0 ± 4.9

45.1 ± 3.0

27

#2

Figure 2a

0.0019 ± 0.0001

0.0050 ± 0.0002

0.0018 ± 0.0001

0.39 ± 0.00

1.46 ± 0.07

2.24 ± 0.07

67.6 ± 4.3

44.2 ± 2.9

28

#3

Figure 2b

0.0025 ± 0.0000

0.0088 ± 0.0010

0.0046 ± 0.0007

0.29 ± 0.03

1.45 ± 0.08

2.24 ± 0.05

68.3 ± 5.1

44.2 ± 2.2

27

#4

Figure 2b

0.0051 ± 0.0003

0.0100 ± 0.0005

0.0055 ± 0.0000

0.51 ± 0.01

1.46 ± 0.06

2.23 ± 0.03

67.1 ± 2.9

43.8 ± 1.3

27

#5

Figure 2b

0.0025 ± 0.0001

0.0070 ± 0.0006

0.0039 ± 0.0008

0.36 ± 0.05

1.52 ± 0.08

2.22 ± 0.08

63.2 ± 4.3

43.2 ± 3.1

27

#6

Figure 2c

0.0017 ± 0.0000

0.0052 ± 0.0001

0.0026 ± 0.0001

0.34 ± 0.01

1.39 ± 0.07

2.20 ± 0.08

70.8 ± 5.5

44.8 ± 3.0

27

#7

Figure 2d

0.0016 ± 0.0004

0.0066 ± 0.0005

0.0034 ± 0.0004

0.24 ± 0.04

1.47 ± 0.08

2.24 ± 0.04

65.1 ± 3.1

42.6 ± 1.2

27

#8

Figure 2f

0.0018 ± 0.0005

0.0073 ± 0.0009

0.0040 ± 0.0005

0.26 ± 0.10

1.48 ± 0.06

2.25 ± 0.06

66.3 ± 2.7

43.6 ± 2.2

30*

#9

Figure 2f

0.0014 ± 0.0001

0.0038 ± 0.0001

0.0024 ± 0.0000

0.39 ± 0.05

1.48 ± 0.06

2.25 ± 0.06

66.3 ± 2.7

43.6 ± 2.2

30*

#10

Figure 2f

0.0021 ± 0.0003

0.0094 ± 0.0001

0.0048 ± 0.0002

0.22 ± 0.03

1.46 ± 0.04

2.26 ± 0.04

66.7 ± 1.6

42.9 ± 0.9

30

#11

Figure 2g

0.0026 ± 0.0002

0.0050 ± 0.0003

0.0024 ± 0.0002

0.51 ± 0.00

1.49 ± 0.08

2.25 ± 0.03

65.8 ± 3.9

43.4 ± 1.4

28

#12

 

n.d.

0.0042 ± 0.0001

0.0015 ± 0.0002

 

1.40 ± 0.06

2.24 ± 0.03

69.6 ± 2.5

43.6 ± 0.9

27

#13

 

n.d.

n.d.

n.d.

 

1.36 ± 0.13

2.00 ± 0.37

77.9 ± 8.8

52.4 ± 12.7

27

T-58

#14

Figure 2j

0.0021 ± 0.0000

0.0056 ± 0.0004

0.0025 ± 0.0001

0.38 ± 0.02

     
  1. Absorbances at ~ 2960 cm−1, ~ 2925 cm−1, and 2850 cm−1 and R3/2 values of the analyzed carbonaceous matter. Errors show standard deviations. n.d. not detected
  2. *The same data are shown because the analyzed area for FTIR microspectroscopy of the clots were overlapped
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