Negev phosphates (Rotem, Oron, Nahal Zin, Arad)
Negev, Israël
OtherP
- Type
- Marine sedimentary phosphorite (carbonate fluorapatite)
Phosphate rocks studied by Hill et al. (2024) to reconstruct redox conditions and diagenesis: U, Sr and rare earths carried by carbonate fluorapatite; samples taken at mines or from the Julius Kühn Institute archives. Late Campanian (about 73 Ma); abundant calcite in some samples (up to 46 %). Coordinates not given.
87Sr/86Sr isotope ratio, no unit Values of the same system
Standard : NIST SRM 987
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.707781 ± 0.000039 | 0.707731 / 0.707854 | 8 | phosphate rock (bulk) Mean and standard deviation recalculated from 8 analyses, samples IL-1, IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8. | Hill et al. (2024), Reconstructing the depositional environment and diagenetic modificati… |
| 0.707767 ± 0.000027 | 0.707748 / 0.707786 | 2 | extracted carbonate fluorapatite (CFA) Mean and standard deviation recalculated from 2 analyses, samples IL-1, IL-3. | Hill et al. (2024), Reconstructing the depositional environment and diagenetic modificati… |
δ238U in ‰ (per mil) Values of the same system
Standard : NBL CRM 112-A
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.14 ± 0.057 ‰ | −0.241 / −0.102 ‰ | 5 | extracted carbonate fluorapatite (CFA) Mean and standard deviation recalculated from 5 analyses, samples IL-1, IL-3, IL-5, IL-6, IL-7; modern seawater at -0.38 ‰ for comparison. | Hill et al. (2024), Reconstructing the depositional environment and diagenetic modificati… |
δ234U in ‰ (per mil) Values of the same system
Standard : équilibre séculaire
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.56 ± 10.66 ‰ | −9.5 / 18.48 ‰ | 5 | extracted carbonate fluorapatite (CFA) Mean and standard deviation recalculated from 5 analyses, samples IL-1, IL-3, IL-5, IL-6, IL-7; a departure from 0 signals uranium mobility within the last two million years. | Hill et al. (2024), Reconstructing the depositional environment and diagenetic modificati… |
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 20.52 ± 0.33 ‰ | 20.09 / 20.91 ‰ | 6 | rock phosphate (PO4 oxygen) Mean and standard deviation recalculated from 6 analyses, samples IL-3, IL-4, IL-5, IL-6, IL-7, IL-8. | Hill et al. (2024), Reconstructing the depositional environment and diagenetic modificati… |
Deposits of the same type
- Central African Copperbelt (whole province) DR Congo and Zambia
- Witwatersrand basin South Africa
- Stelvio Italy
- Oris Italy
- Kupferschiefer, Lubin-Sieroszowice district Poland
- Timna Israël
- Datangpo-type manganese (Gaolou, Minle, Zhenxing) China
- Eyller Bruch bog iron ore Germany
Cite this page
IsoFind Atlas (2026). Negev phosphates (Rotem, Oron, Nahal Zin, Arad), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/phosphates-du-neguev-rotem-oron-nahal-zin-arad/ (accessed 2026-10-15).
@misc{isofind2026negevphosphatesrotemoronnahal,
title = {Negev phosphates (Rotem, Oron, Nahal Zin, Arad), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/phosphates-du-neguev-rotem-oron-nahal-zin-arad/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15