The osmium isotopic composition of organic-rich marine sediments
Saved in:
| Online Access: |
Get full text
doi: 10.1016/0012-821X(92)90034-S |
|---|---|
| Authors: | Ravizza, G.; Turekian, K. K. |
| Author Affiliations: | Primary: Yale Univ., Dep. Geol. and Geophys., New Haven, CT, United States |
| Volume Title: | Earth and Planetary Science Letters |
| Source: | Earth and Planetary Science Letters, 110(1-4), p.1-6. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X |
| Publication Date: | 1992 |
| Note: | In English. 22 refs.; 2 tables |
| Summary: | The Os concentration and 187Os/186Os ratios of several recent, marine, organic-rich sediment samples from three widely separated sites were measured. Os concentrations range from 0.095 to 0.212 ppb and 187Os/186Os ratios range from 8.2 to 8.9. The calculated fraction of hydrogenous Os exceeds 78% in all samples. Thus, the 187Os/186Os ratio of these samples reflects Os isotopic composition of sea-water. The small range in measured 187Os/186Os ratio indicates that the Os isotopic composition at these sites is fairly homogeneous. The large magnitude of the Os burial flux at these sites indicates that the Os burial in association with organic-rich sediments is an important sink in the marine cycle of Os. These data also suggest that ancient organic-rich sediments may provide a record of past variations in the Os isotopic composition of sea-water. [Authors' abstract] [P.Br.] |
| Subjects: | Cenozoic; Geochemistry; Holocene; Isotopes; Marine environment; Marine sediments; Metals; Organic compounds; Os-187/Os-186; Osmium; Platinum group; Quaternary; Radioactive isotopes; Sea water; Sediments; Stable isotopes; Organic materials |
| Abstract Numbers: | 93M/788 |
| Record ID: | 1992036656 |
| Copyright Information: | GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| LEADER | 03038naaaa2200505zu 4500 | ||
|---|---|---|---|
| 001 | 1992036656 | ||
| 003 | ViAlAGI | ||
| 005 | 20190221171121.0 | ||
| 008 | 190110e199205 ne a 0 0 eng d | ||
| 040 | |a ViAlAGI |c ViAlAGI | ||
| 072 | 7 | |a 02D |2 georeft | |
| 072 | 7 | |a 07 |2 georeft | |
| 100 | 1 | |a Ravizza, G. |e analytic author |u Yale Univ., Dep. Geol. and Geophys., New Haven, CT | |
| 245 | 1 | 4 | |a The osmium isotopic composition of organic-rich marine sediments |
| 300 | |a p. 1-6 | ||
| 500 | |a In English. 22 refs. | ||
| 500 | |a Abstract number: 93M/788 | ||
| 500 | |a Abstractor: P.Br. | ||
| 500 | |a Affiliation: Yale Univ., Dep. Geol. and Geophys.; New Haven, CT; USA; United States | ||
| 500 | |a Key title: Earth and Planetary Science Letters | ||
| 500 | |a Source note: Earth and Planetary Science Letters, 110(1-4), p.1-6. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X | ||
| 500 | |a Publication type: journal article | ||
| 504 | |b 22 refs. | ||
| 510 | 3 | |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom | |
| 520 | |a The Os concentration and >187`Os/>186`Os ratios of several recent, marine, organic-rich sediment samples from three widely separated sites were measured. Os concentrations range from 0.095 to 0.212 ppb and >187`Os/>186`Os ratios range from 8.2 to 8.9. The calculated fraction of hydrogenous Os exceeds 78% in all samples. Thus, the >187`Os/>186`Os ratio of these samples reflects Os isotopic composition of sea-water. The small range in measured >187`Os/>186`Os ratio indicates that the Os isotopic composition at these sites is fairly homogeneous. The large magnitude of the Os burial flux at these sites indicates that the Os burial in association with organic-rich sediments is an important sink in the marine cycle of Os. These data also suggest that ancient organic-rich sediments may provide a record of past variations in the Os isotopic composition of sea-water. [Authors' abstract] | ||
| 650 | 7 | |a Cenozoic |2 georeft | |
| 650 | 7 | |a Geochemistry |2 georeft | |
| 650 | 7 | |a Holocene |2 georeft | |
| 650 | 7 | |a Isotopes |2 georeft | |
| 650 | 7 | |a Marine environment |2 georeft | |
| 650 | 7 | |a Marine sediments |2 georeft | |
| 650 | 7 | |a Metals |2 georeft | |
| 650 | 7 | |a Organic compounds |2 georeft | |
| 650 | 7 | |a Os-187/Os-186 |2 georeft | |
| 650 | 7 | |a Osmium |2 georeft | |
| 650 | 7 | |a Platinum group |2 georeft | |
| 650 | 7 | |a Quaternary |2 georeft | |
| 650 | 7 | |a Radioactive isotopes |2 georeft | |
| 650 | 7 | |a Sea water |2 georeft | |
| 650 | 7 | |a Sediments |2 georeft | |
| 650 | 7 | |a Stable isotopes |2 georeft | |
| 653 | |a Organic materials | ||
| 700 | 1 | |a Turekian, K. K., |e analytic author | |
| 773 | 0 | |t Earth and Planetary Science Letters |d Amsterdam : Elsevier, May 1992 |x 0012-821X |y EPSLA2 |n Earth and Planetary Science Letters, 110(1-4), p.1-6. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X Publication type: journal article |g Vol. 110, no. 1-4 |h 2 tables | |
| 856 | |u urn:doi: 10.1016/0012-821X(92)90034-S | ||