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Swiss Journal of Geosciences

Table 2 Results by lithology including TC, TOC and total HC concentration in ppm (parts per million) and organic carbon isotopic composition of bulk rock δ13Corganic

From: Preserved organic matter in a fossil Ocean Continent Transition in the Alps: the example of Totalp, SE Switzerland

  Sample number Total carbon (ppm) Total corganic (ppm) Hydrocarbons (HC) (ppm) n-alkanes δ 13CVPDB (‰) on TOC Steranes Hopanes PAHs*
Range Cmax CPI Mean carbon number
Serpentinite
 Massive serpentinite 5, 16 395–3135 102–176 23–900 16–39 C20, C29 0.76–1.29 20–28   BDL BDL *
 Serpentinite with numerous Ca veins 24, 26, 44, 47 20400–42500 19–135 1–124 16–35 C20, C26 0.8–1.05 22–28   BDL * *
 Red serpentinite (with hematite) 71 88205 268 1 17–35 C26 1.17 22.3   BDL BDL **
 Serpentinite gouge 69 539 284 3 17–33 C29 0.94 26.0   BDL * BDL
 Serpentinite cataclasite 70 876 269 46 17–36 C20 0.94 24.1   BDL BDL **
 Massive serpentinitea 77, 78 454 ≈190 0.05–4 17–40 C29 0.84–0.97 29–30   BDL * BDL
Ophicalcite
 Neptunian dykes 1, 23 95600–107500 15–103 0.03–121 17–35 C29 1.05 27–29 −27.06 ** ** **
Tectono-sedimentary ophicalcite
 Red matrix, serp. claste and Ca veins 21, 25, 39, 41, 42, 46, 66 33360–101700 11–116 2–2470 17–38 C18 to C28 0.81–1.42 23–31 −27.4 ** ** **
 Reworked tec-sed. ophicalcite 9 106000 86 50 16–36 C22 0.65 24 −26.1 BDL * **
 Serp.clasts in Ca veins 72 69600 30 124 20–36 C29 0.90 28   BDL BDL BDL
Sediments
 Radiolarite from sulphide rich outcrop 62, 68 671–13200 66–187 1–17 17–34 C20 C31 1.19–2.87 24–28   BDL ** *
 Siliceous shale from sulphide rich outcrop 60, 61 384–672 194–433 22–144 16–37 C20 C27 1.05–1.52 23–25   ** ** **
 Siliceous shale near sulphide rich outcrop 15, 18 285–318 136–145 13–27 16–33 C18,C20 0.95–1.19 23–24   * * BDL
 Limestones 10,19 98200–129000 74–82 79–171 16–35 C22, C27 0.92–0.94 23–27 −26.62 BDL *** ***
Limestone from parsennhütte 53, 54, 56, 57, 58 46500–94500 14–92 3–238 16–37 C23, C29 0.82–1.10 22–23   * * **
 Sulphide rich outcrop 63, 64, 65 442–90400 153–647 1–24 17–33 C20, C27 0.93–1.55 23–26 −26.02 ** ** **
  1. For the n-alkanes: the carbon number range (n-alkane range), the maximum carbon number (Cmax), carbon preference index (CPI values) and mean carbon number (MC#) are shown. For the steranes, hopanes and PAHs the concentrations are in ppm and are represented in intervals by star symbol *, where * = [0–0.1), ** = [0.1–1) and *** = [1–10)
  2. BDL below detection limit, a identified PAHs in the samples were: Phenanthrene, P Fluoranthene, Fluo Pyrene, Pyr Chrysene, Chry Benzo(a)anthracene, BaA Benzo(b)fluoranthene, BbF Benzo(a)pyrene, BaP Indeno(1,2,3-cd)pyrene, IndPy Benzo(ghi)perylene, BghiP Dibenzothiophene (DBT), methylP (3,2,1 and 9 MPs) and 2-methyl naphthalene; not all were present in every sample
  3. aAll lithology are from lower sub-unit except the massive serpentinite (samples 77, 78) which is from upper sub-unit
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