Table 1 Environmental DNA samples analyzed in this study

From: Novel microbial assemblages inhabiting crustal fluids within mid-ocean ridge flank subsurface basalt

Borehole

Crustal age (Ma)

Depth

Fluid line

Sample

Number of samples by year

Total

     

2008

2009 a

2010

2011

 

1025C

1.2

0–46 msb

None

Basalt-hosted

1

1

U1301A

3.5

8–107 msb

Stainless

Basalt-hosted

4

4

9

3

20

U1362A

3.5

193–292 msb

Tefzel

Basalt-hosted

3

3

U1362B

3.5

29–117 msb

Tefzel

Basalt-hosted

4

4

U1363 suite

NA

~1–225 mbsf

NA

Sediment

11

11

NA

NA

~2500–2650 mbsl

NA

Seawater

2

3

10

5

20

  1. Abbreviations: Ma, million years old; mbsf: meters below seafloor; mbsl: meters below sea-level; msb, meters sub-basement; NA, not applicable.
  2. aSamples from CORKs 1026B and U1301B were excluded because no high-quality samples were collected or analyzed.