Steller, L. H. et al. (2019) Boron Isotopes in the Puga Geothermal System, India, and Their Implications for the Habitat of Early Life, Astrobiology, 19, 1459-1473, doi: 10.1089/ast.2018.1966. < 20190829192038-796925 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    Boron is associated with several Archean stromatolite deposits, including the tourmaline-rich Barberton stromatolites in South Africa and tourmaline-bearing pyritic laminae associated with stromatolites of the 3.48 Ga Dresser Formation in the Pilbara Craton, Australia. Boron is also a critical element in prebiotic organic chemistry, including in the formation of ribose, a crucial component in RNA. As geological evidence and advances in prebiotic chemistry are now suggesting that hot spring activity may be associated with the origins of life, an understanding of boron and its mobility and isotopic fractionation in geothermal settings may provide important insights into the setting for the origin of life.
    Here, we report on the boron isotopic compositions and elemental concentrations in a range of fluid, sediment, and mineral samples from the active, boron-rich Puga geothermal system in the Himalayas, India. This includes one of the lowest boron isotope values ever recorded in modern settings: diatom-rich sediments (δ11B = −41.0‰) in a multiphase fractionation system where evaporation is not the dominant form of isotope fractionation. Instead, the extreme boron isotopic fractionation is ascribed to the incorporation of tetrahedral 10B borate anions in precipitating amorphous silica. These findings expand the known limits and drivers of boron isotope fractionation, as well as provide insight into the concentration and fractionation of boron in Archean hot spring environments.

  • doi: 10.1089/ast.2018.1966
  • modified at 16 h ago


(a) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on Q-ICPMS Agilent 7500cs
(b) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on ICPMS Thermo-Fisher Element XR
(c) B_procedures of Nakamura et al. (1992) on TIMS Thermo-Fisher Triton


(a) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on Q-ICPMS Agilent 7500cs
(b) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on ICPMS Thermo-Fisher Element XR
(c) B_procedures of Nakamura et al. (1992) on TIMS Thermo-Fisher Triton
Ti hr1662795613 thumb PU-W-01-C < 20170125102328-322753 >pub
  • IGSN: IEDRM00WK
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 176.5
  • description: Puga geothermal field; corresponds to sample "PU_01F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr 571973496 thumb PU-W-07-D < 20170130171122-543633 >pub
  • IGSN: IEDRM00WL
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 176.9
  • description: Puga geothermal field; corresponds to sample "PU_07F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr1361326107 thumb PU-W-09-C < 20170125102409-830743 >pub
  • IGSN: IEDRM00WM
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 177.17
  • description: Puga geothermal field; corresponds to sample "PU_09F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr1618027866 thumb PU-W-10-C < 20170125102419-915807 >pub
  • IGSN: IEDRM00WN
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 173.94
  • description: Puga geothermal field; corresponds to sample "PU_10F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr663108038 thumb PU-W-11-C < 20170125102429-559448 >pub
  • IGSN: IEDRM00WO
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 171.32
  • description: Puga geothermal field; corresponds to sample "PU_11F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr 627489879 thumb PU-W-14-C < 20170125102435-798301 >pub
  • IGSN: IEDRM00WP
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 170.35
  • description: Puga geothermal field; corresponds to sample "PU_14F" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr 1493453010 thumb PU-G-07-B < 20170130171037-539974 >pub
  • IGSN: IEDRM00WQ
  • classification: sedimentary
  • physical-form: powder
  • quantity (g): 56.94
  • description: Puga geothermal field; suspended sediment in mud pool; corresponds to sample "PU_07BR" in Steller et al., 2019
  • modified at 2019-11-27
Ti hr 968578503 thumb PU-G-07-A < 20160826170732-972134 >pub
  • IGSN: IEDRM00WR
  • classification: sedimentary
  • physical-form: powder
  • quantity (g): 22.96
  • description: Puga geothermal field; pool rim sediment, unconsolidated mud; corresponds to sample "PU_07AS" in Steller et al., 2019
  • modified at 2019-11-27
Tixhr1764192207 thumb PU-G-11-B < 20160825111439-308283 >pub
  • IGSN: IEDRM00WS
  • classification: sedimentary
  • physical-form: chunk
  • quantity (g): 78.38
  • description: Puga geothermal field; hot spring sediments; corresponds to sample "PU_11BS" in Steller et al., 2019
  • modified at 2019-11-27
Tixhr 2050275213 thumb PU-W-07-B < 20160825110154-222637 >pub
  • IGSN: IEDRM00WT
  • classification: aqueous
  • physical-form: solution
  • quantity (g): 185.89
  • description: Puga geothermal field; fluid fraction of centrifuged and filtered mud sample; corresponds to sample "PU_07BF" in Steller et al., 2019
  • modified at 2019-11-27
Img 2714 thumb PU-G-05-C-1 < 20160826170347-517806 >pub
  • IGSN: IEDRM00WU
  • classification: sedimentary
  • physical-form: chunk
  • quantity (g): 2.4
  • description: Puga geothermal field; evaporite paste; corresponds to sample "PU_05S" in Steller et al., 2019
  • modified at 2019-11-27
Tixhr 1396357043 thumb PU-G-11-D < 20160825111550-543427 >pub
  • IGSN: IEDRM00WV
  • classification: sedimentary
  • physical-form: chunk
  • quantity (g): 19.2
  • description: Puga geothermal field; laminated crust; corresponds to sample "PU_11AS" in Steller et al., 2019
  • modified at 2019-11-27
Tixhr 1739808889 thumb PU-G-14-B < 20161104160536-461437 >pub
  • IGSN: IEDRM00WW
  • classification: sedimentary
  • physical-form: chunk
  • quantity (g): 47.75
  • description: Puga geothermal field; digitate nodules; corresponds to sample "PU_14S" in Steller et al., 2019
  • modified at 2019-11-27
Tixhr1915457554 thumb PU-G-10-C < 20160825111211-136398 >pub
  • IGSN: IEDRM00WX
  • classification: sedimentary
  • physical-form: chunk
  • quantity (g): 9.6
  • description: Puga geothermal field; puffy evaporative crust; corresponds to sample "PU_10S" in Steller et al., 2019
  • modified at 2019-11-27
name box-type global-id
binder of Boron Isotopes in the Puga Geothermal System, India, and Their Implications for the Habitat of Early Life pub container 20190930095239-902948
name device size global-id
PU-W-01-C pub ICPMS Thermo-Fisher Element XR 10 20190930114004-791114
PU-W-01-C pub TIMS Thermo-Fisher Triton 1 20190930114036-585920
PU-W-01-C pub Q-ICPMS Agilent 7500cs 7 20190930114025-562763
PU-W-07-D pub TIMS Thermo-Fisher Triton 1 20190930114036-735700
PU-W-07-D pub ICPMS Thermo-Fisher Element XR 12 20190930114005-698791
PU-W-07-D pub Q-ICPMS Agilent 7500cs 7 20190930114025-038519
PU-W-09-C pub TIMS Thermo-Fisher Triton 1 20190930114036-543271
PU-W-09-C pub ICPMS Thermo-Fisher Element XR 10 20190930114006-693559
PU-W-09-C pub Q-ICPMS Agilent 7500cs 7 20190930114025-647145
PU-W-10-C pub TIMS Thermo-Fisher Triton 1 20190930114036-253324
PU-W-10-C pub ICPMS Thermo-Fisher Element XR 11 20190930114006-996763
PU-W-10-C pub Q-ICPMS Agilent 7500cs 7 20190930114026-766510
PU-W-11-C pub TIMS Thermo-Fisher Triton 1 20190930114036-402982
PU-W-11-C pub ICPMS Thermo-Fisher Element XR 11 20190930114007-121426
PU-W-11-C pub Q-ICPMS Agilent 7500cs 7 20190930114026-315921
PU-W-14-C pub ICPMS Thermo-Fisher Element XR 11 20190930114007-624806
PU-W-14-C pub TIMS Thermo-Fisher Triton 1 20190930114036-382230
PU-W-14-C pub Q-ICPMS Agilent 7500cs 7 20190930114026-665765
PU-G-07-B pub ICPMS Thermo-Fisher Element XR 12 20190930114325-391527
PU-G-07-B pub Q-ICPMS Agilent 7500cs 8 20190930114458-192451
PU-G-07-B pub TIMS Thermo-Fisher Triton 1 20190930114527-616104
PU-G-05-C-1 pub ICPMS Thermo-Fisher Element XR 12 20190930114323-112330
PU-G-05-C-1 pub TIMS Thermo-Fisher Triton 1 20190930114527-994768
PU-G-05-C-1 pub Q-ICPMS Agilent 7500cs 8 20190930114457-326844
PU-G-10-C pub ICPMS Thermo-Fisher Element XR 12 20190930114324-701668
PU-G-10-C pub TIMS Thermo-Fisher Triton 1 20190930114527-724060
PU-G-10-C pub Q-ICPMS Agilent 7500cs 8 20190930114458-765917
PU-G-07-A pub ICPMS Thermo-Fisher Element XR 12 20190930114323-036802
PU-G-07-A pub TIMS Thermo-Fisher Triton 1 20190930114527-781994
PU-G-07-A pub Q-ICPMS Agilent 7500cs 8 20190930114458-495067
PU-G-11-B pub ICPMS Thermo-Fisher Element XR 12 20190930114324-738730
PU-G-11-B pub Q-ICPMS Agilent 7500cs 8 20190930114458-040815
PU-G-11-B pub TIMS Thermo-Fisher Triton 1 20190930114527-894666
PU-G-11-D pub ICPMS Thermo-Fisher Element XR 12 20190930114324-371815
PU-G-11-D pub Q-ICPMS Agilent 7500cs 8 20190930114458-787042
PU-G-11-D pub TIMS Thermo-Fisher Triton 1 20190930114527-279618
PU-G-14-B pub ICPMS Thermo-Fisher Element XR 12 20190930114324-513246
PU-G-14-B pub Q-ICPMS Agilent 7500cs 8 20190930114458-101150
PU-G-14-B pub TIMS Thermo-Fisher Triton 1 20190930114527-812081
PU-W-07-B pub ICPMS Thermo-Fisher Element XR 12 20190930114008-733381
PU-W-07-B pub TIMS Thermo-Fisher Triton 1 20190930114036-341543
PU-W-07-B pub Q-ICPMS Agilent 7500cs 7 20190930114026-465232
name spots global-id
caption ID assembly stone
Table 2. Elemental Abundances (ppm) and d 11 B Values of the Puga Rock and Sediment Samples pub 20190930135938-496461 major-minor-trace_rock (Luke et al., 2019) 7
Table 1. Elemental Abundances, and d 11 B of Fluid Samples pub 20190930134703-410482 major-minor-trace_fluid (Luke et al., 2019) 7
manual
  • name
  • Steller, L. H.
  • Nakamura, E.
  • Ota, T.
  • Sakaguchi, C.
  • Sharma, M.
  • Van Kranendonk, M. J.