Rhine from Basel to Speyer (placers, detrital Ru-Os-Ir alloys)

Upper Rhine, Basel to Speyer stretch, France et Allemagne

Sediments

Type: Sediment

Detrital Ru-Os-Ir alloys from Upper Rhine gold and platinum-group mineral placers; Dijkstra et al. (2016) link them to Paleozoic residual peridotites of the Alps, accreted with the Armorican terranes before the Variscan orogeny. Over the four localities, main mode at 0.1244 (Re-depletion age 0.48 Ga) and inflection point at 0.1205 (1.06 Ga). Locality B of the appendix: concentrate from the whole b-b' stretch of Fig. 1, not from a single point. Coordinates not published.

187Os/188Os isotope ratio, no unit Values of the same system

Standard : Rapport absolu, sans standard de référence

Value	Range	n	Mineral or matrix	Source
0.12278 ± 0.00474	0.11309 / 0.14631	134	detrital Ru-Os-Ir alloys (single grains) Mean and standard deviation recalculated from 134 analyses, 0.11309 to 0.14631 (AD Mt1 R8 0.11309; AD Mt2 R189 0.11334; AD Mt2 R217 0.11514; AD Mt1 R22 0.11603; AD Mt2 R178 0.11625; AD Mt2 R246 0.11666; AD Mt2 R205 0.11668; AD Mt2 R221 0.11671; AD Mt2 R262 0.11678; AD Mt2 R249 0.11684; AD Mt1 R60 0.11692; AD Mt2 R149 0.11725; AD Mt2 R267 0.11735; AD Mt1 R20 0.11742; AD Mt2 R211 0.11743; AD Mt2 R143 0.11768; AD Mt2 R203 0.11808; AD Mt1 R81 0.11808; AD Mt1 R9 0.11837; AD Mt2 R269 0.11842; AD Mt2 R190 0.11847; AD Mt2 R229 0.11859; AD Mt2 R164 0.11867; AD Mt2 R234 0.11871; AD Mt2 R121 0.11878; AD Mt2 R123 0.11885; AD Mt2 R134 0.11897; AD Mt2 R260 0.11910; AD Mt2 R140 0.11916; AD Mt1 R66 0.11919; AD Mt2 R202 0.11928; AD Mt2 R152 0.11930; AD Mt1 R75 0.11947; AD Mt1 R57 0.11948; AD Mt2 R216 0.11951; AD Mt2 R232 0.11959; AD Mt2 R233 0.11980; AD Mt1 R71 0.11981; AD Mt2 R225 0.11984; AD Mt1 R17 0.11993; AD Mt1 R84 0.11999; AD Mt2 R176 0.12010; AD Mt2 R135 0.12013; AD Mt2 R257 0.12030; AD Mt1 R76 0.12060; AD Mt2 R193 0.12063; AD Mt2 R102 0.12075; AD Mt1 R80 0.12113; AD Mt2 R212 0.12114; AD Mt1 R10 0.12120; AD Mt2 R227 0.12120; AD Mt1 R40 0.12122; AD Mt1 R42 0.12122; AD Mt2 R173 0.12134; AD Mt2 R174 0.12140; AD Mt2 R153 0.12148; AD Mt2 R243 0.12148; AD Mt2 R195 0.12225; AD Mt1 R46 0.12230; AD Mt2 R126 0.12239; AD Mt2 R160 0.12248; AD Mt2 R112 0.12249; AD Mt1 R70 0.12277; AD Mt1 R48 0.12292; AD Mt1 R25 0.12294; AD Mt2 R198 0.12301; AD Mt1 R28 0.12308; AD Mt2 R238 0.12311; AD Mt1 R78 0.12321; AD Mt1 R77 0.12322; AD Mt2 R196 0.12327; AD Mt2 R264 0.12359; AD Mt2 R138 0.12359; AD Mt2 R230 0.12362; AD Mt2 R208 0.12365; AD Mt1 R36 0.12375; AD Mt1 R82 0.12382; AD Mt2 R156 0.12398; AD Mt1 R38 0.12426; AD Mt2 R253 0.12433; AD Mt1 R21 0.12439; AD Mt1 R68 0.12443; AD Mt1 R27 0.12449; AD Mt2 R125 0.12449; AD Mt2 R175 0.12450; AD Mt2 R235 0.12453; AD Mt2 R101 0.12453; AD Mt1 R74 0.12454; AD Mt1 R58 0.12455; AD Mt2 R122 0.12455; AD Mt1 R63 0.12462; AD Mt1 R62 0.12462; AD Mt1 R50 0.12464; AD Mt2 R154 0.12464; AD Mt2 R237 0.12468; AD Mt2 R210 0.12476; AD Mt1 R7 0.12483; AD Mt1 R15 0.12484; AD Mt1 R55 0.12488; AD Mt1 R39 0.12495; AD Mt2 R161 0.12496; AD Mt2 R254 0.12501; AD Mt2 R115 0.12504; AD Mt2 R209 0.12507; AD Mt1 R83 0.12515; AD Mt1 R14 0.12521; AD Mt2 R251 0.12523; AD Mt1 R2 0.12527; AD Mt1 R67 0.12530; AD Mt2 R220 0.12530; AD Mt1 R49 0.12538; AD Mt1 R41 0.12539; AD Mt1 R54 0.12543; AD Mt2 R206 0.12548; AD Mt2 R159 0.12550; AD Mt2 R163 0.12551; AD Mt2 R219 0.12568; AD Mt1 R53 0.12572; AD Mt2 R162 0.12579; AD Mt2 R226 0.12586; AD Mt2 R223 0.12590; AD Mt2 R165 0.12642; AD Mt1 R30 0.12715; AD Mt2 R150 0.12734; AD Mt1 R73 0.12748; AD Mt2 R188 0.12818; AD Mt1 R18 0.12841; AD Mt1 R72 0.12959; AD Mt2 R187 0.13091; AD Mt1 R86 0.13172; AD Mt1 R35 0.13554; AD Mt2 R265 0.13601; AD Mt2 R224 0.14408; AD Mt2 R259 0.14631). 9 suprachondritic grains (above 0.1276), which the authors attribute to mantle pyroxenites. Discarded grains (187Re/188Os above 0.01): AD Mt2 R250 0.12280 (187Re/188Os 0.0116); AD Mt1 R65 0.12618 (187Re/188Os 0.0656).	Dijkstra et al. (2016), Osmium isotope compositions of detrital Os-rich alloys from the R…

Deposits of the same type

Pebble iron oxide precipitates United States
Laohugou No. 12 Glacier cryoconite China
Yuzhufeng Glacier cryoconite China
Bayi Glacier cryoconite China
Qiyi Glacier cryoconite China
Yulong Snow Mountains glacier cryoconite China
Hailuogou Glacier (Mount Gongga) cryoconite China
Dangxiong Glacier cryoconite China

Cite this page

IsoFind Atlas (2026). Rhine from Basel to Speyer (placers, detrital Ru-Os-Ir alloys), isotope signatures. https://www.isofind.tech/isotopes/en/sites/rhin-de-bale-a-spire-placers-alliages-ru-os-ir-detritiques/ (accessed 2026-10-20).

@misc{isofind2026rhinefrombaseltospeyerplacers,
  title = {Rhine from Basel to Speyer (placers, detrital Ru-Os-Ir alloys), isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/sites/rhin-de-bale-a-spire-placers-alliages-ru-os-ir-detritiques/},
  note = {Accessed 2026-10-20}
}

Updated : 2026-10-20