Strengbach catchment (Vosges)
Vosges Mountains, eastern side (Strengbach observatory), France
Other media
- Type
- Other medium
Forested 80 ha catchment between 883 and 1146 m on Ca-poor Hercynian granite (315 ± 7 Ma), monitored since 1986. Vilela et al. (2025): bedrock δ49Ti from +0.42 to +0.62 ‰, topsoils (0-30 cm) lighter by 0.07 ‰ on average, needles and leaves heavier by 0.16 to 0.22 ‰, waters much lighter (water-bedrock Δ of -0.77 ‰ on average, RUZS spring excluded). Profiles VP (spruce), VP2 (spruce, north bank) and HP (beech).
δ49Ti in ‰ (per mil) Values of the same system
Standard : OL-Ti
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.53 ± 0.1 ‰ | 0.42 / 0.62 ‰ | 3 | granite (bedrock of the three profiles) Mean and standard deviation recalculated from 3 analyses, +0.42 to +0.62 (BVP +0.62; BVP2 +0.42; BHP +0.56). BVP below VP, BVP2 below VP2, BHP below HP. Published mean +0.53 ‰. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| 0.57 ± 0.06 ‰ | 0.5 / 0.68 ‰ | 6 | soil, VP profile (spruce) Mean and standard deviation recalculated from 6 analyses, +0.50 to +0.68 (VP 0-5 +0.50; VP 5-10 +0.55; VP 10-20 +0.54; VP 20-40 +0.54; VP 40-60 +0.60; VP 60-80 +0.68). Depths in cm. δ49Ti from +0.68 ‰ at 60-80 cm to +0.50 ‰ at the surface; soil-bedrock Δ from -0.12 to +0.06 ‰. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| 0.4 ± 0.04 ‰ | 0.37 / 0.46 ‰ | 5 | soil, VP2 profile (spruce) Mean and standard deviation recalculated from 5 analyses, +0.37 to +0.46 (VP2 0-10 +0.37; VP2 10-30 +0.39; VP2 30-50 +0.38; VP2 50-70 +0.46; VP2 70-90 +0.42). Depths in cm; Ti contents not calculated (unknown spike mass). Soil-bedrock Δ from -0.05 to +0.04 ‰. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| 0.52 ± 0.06 ‰ | 0.44 / 0.58 ‰ | 6 | soil, HP profile (beech) Mean and standard deviation recalculated from 6 analyses, +0.44 to +0.58 (HP 0-5 +0.47; HP 5-10 +0.44; HP 10-20 +0.52; HP 20-40 +0.54; HP 40-60 +0.58; HP 60-80 +0.57). Depths in cm. Soil-bedrock Δ from -0.12 to +0.02 ‰. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| 0.56 ± 0.12 ‰ | 0.42 / 0.66 ‰ | 3 | forest floor (surface organic layer) Mean and standard deviation recalculated from 3 analyses, +0.42 to +0.66 (VP L +0.66; VP2 L +0.42; HP L +0.59). Forest floor-bedrock Δ from 0.00 to +0.04 ‰ (published mean +0.02 ‰). | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| 0.78 ± 0.08 ‰ | 0.72 / 0.84 ‰ | 2 | vegetation (spruce needles SP1, beech leaves BE1) Mean and standard deviation recalculated from 2 analyses, +0.72 to +0.84 (SP1 +0.84; BE1 +0.72). Branches from six trees per site. Vegetation-bedrock Δ of +0.22 (SP1) and +0.16 ‰ (BE1); Ti 8.8 and 4.0 µg/g. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| −0.27 ± 0.25 ‰ | −0.67 / −0.02 ‰ | 5 | groundwater and spring water (0.45 µm filtered) Mean and standard deviation recalculated from 5 analyses, -0.67 to -0.02 (CS1 -0.67; CS2 -0.32; CS3 -0.11; CS4 -0.21; RH3 -0.02). Ti 0.07 to 0.11 ng/g. Water-bedrock Δ from -1.21 to -0.56 ‰ (published mean -0.80 ‰), calculated on the mean of the three bedrocks. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| −0.04 ± 0.46 ‰ | −0.56 / 0.63 ‰ | 5 | river water (0.45 µm filtered) Mean and standard deviation recalculated from 5 analyses, -0.56 to +0.63 (BH +0.07; RAZS -0.37; RS +0.02; RUZS +0.63; RZ -0.56). Ti 0.14 to 0.25 ng/g. RUZS (+0.63 ‰), the only wetland sample, stays above the bedrock and is not explained by the authors; published mean -0.04 ‰. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
| −0.09 ‰ | 1 | soil solution at 30 cm (VP site, 0.2 µm filtered) Single analysis (VPS). Ti 6.0 ng/g, well above the waters. The published Δ (-0.71 ‰) refers to the BVP bedrock of the same site, not to the bedrock mean as the Table 2 footnote states. | Vilela et al. (2025), Evaluating titanium isotope fractionation processes between soil, p… |
Deposits of the same type
Cite this page
IsoFind Atlas (2026). Strengbach catchment (Vosges), isotope signatures. https://www.isofind.tech/isotopes/en/sites/bassin-versant-du-strengbach-vosges/ (accessed 2026-10-20).
@misc{isofind2026strengbachcatchmentvosgesisot,
title = {Strengbach catchment (Vosges), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/sites/bassin-versant-du-strengbach-vosges/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20