You, Chen-Feng; Chan, Lui-Heung (1996): (Table 3) Li concentrations and isotopic compositions in foraminiferal shells, carbonate sediments, and associated pore waters from ODP Sites 131-806 and 138-851 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.707993
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Published: 1996 (exact date unknown) • DOI registered: 2008-12-23
Abstract:
An improved procedure for lithium isotope analysis using Li3PO4 as the ion source has been investigated for application to geological samples. The 7Li/6Li ratio is measured using double rhenium filament thermal ionization mass spectrometry in which isotopic fractionation is minimized at high temperatures. The method produces a stable, high intensity Li+ ion beam that allows measurement of nanogram quantities of lithium. This results in a reduction in sample size of up to 1000 times relative to that required for the established Li2BO2+ method while maintaining a comparable precision of better than 1‰ (1 sigma). Replicate analyses of the NBS L-SVEC Li2CO3 standard yielded a mean value of 12.1047+/-0.0043 (n=21), which is close to the reported absolute value of 12.02+/-0.03. Intercalibration with a wide range of geological samples shows excellent agreement between the Li3PO4 and Li2BO2+ techniques. Replicate analyses of seawater and a fresh submarine basalt display high precision results that agree with previous measurements.
Taking advantage of the high ionization efficiency of the phosphate ion source, we have made the first measurements of the lithium concentration (by isotope dilution) and isotopic composition of calcareous foraminiferal tests and other marine carbonates. Preliminary results indicate that substantial lithium exchange occurs between carbonate sediments and their interstitial waters. In addition, a possible link between lithium paleoceanography and paleoclimate during the last 1000 ky may be derived from planktonic foraminiferal tests. This highly sensitive technique can be applied in the examination of low lithium reservoirs and thereby provide insight into some fundamental aspects of lithium geochemistry.
Related to:
You, Chen-Feng; Chan, Lui-Heung (1996): Precise determination of lithium isotopic composition in low concentration natural samples. Geochimica et Cosmochimica Acta, 60(5), 909-915, https://doi.org/10.1016/0016-7037(96)00003-8
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 1.953087 * Median Longitude: -140.594200 * South-bound Latitude: 0.318500 * West-bound Longitude: 159.361000 * North-bound Latitude: 2.770380 * East-bound Longitude: -110.571800
Date/Time Start: 1990-02-18T21:00:00 * Date/Time End: 1991-06-19T01:54:00
Minimum DEPTH, sediment/rock: 1.35 m * Maximum DEPTH, sediment/rock: 195.70 m
Event(s):
130-806B * Latitude: 0.318500 * Longitude: 159.361000 * Date/Time Start: 1990-02-18T21:00:00 * Date/Time End: 1990-02-23T01:30:00 * Elevation: -2519.9 m * Penetration: 743.1 m * Recovery: 666.36 m * Location: North Pacific Ocean * Campaign: Leg130 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 743.1 m cored; 0 m drilled; 89.7 % recovery
138-851A * Latitude: 2.770380 * Longitude: -110.571800 * Date/Time Start: 1991-06-16T14:00:00 * Date/Time End: 1991-06-16T21:50:00 * Elevation: -3761.3 m * Penetration: 6.5 m * Recovery: 6.45 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 6.5 m cored; 0 m drilled; 99.2 % recovery
138-851B * Latitude: 2.770380 * Longitude: -110.571800 * Date/Time Start: 1991-06-16T21:50:00 * Date/Time End: 1991-06-19T01:54:00 * Elevation: -3760.3 m * Penetration: 320.5 m * Recovery: 318.05 m * Location: North Pacific Ocean * Campaign: Leg138 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 320.5 m cored; 0 m drilled; 99.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Sample code/label | Sample label | You, Chen-Feng | DSDP/ODP/IODP sample designation | ||
| 4 | Sample type | Samp type | You, Chen-Feng | |||
| 5 | Sample comment | Sample comment | You, Chen-Feng | |||
| 6 | Age model | Age model | ka | You, Chen-Feng | ||
| 7 | Lithium | Li | mg/kg | You, Chen-Feng | ||
| 8 | δ6Li | δ6Li | ‰ | You, Chen-Feng | Mass spectrometer Finnigan MAT 262 | deviation from the L-SVEC Li2CO3 standard |
| 9 | Calcium carbonate | CaCO3 | % | You, Chen-Feng |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
44 data points
Data
| 1 Event | 2 Depth sed [m] | 3 Sample label | 4 Samp type | 5 Sample comment | 6 Age model [ka] | 7 Li [mg/kg] | 8 δ6Li [‰] | 9 CaCO3 [%] |
|---|---|---|---|---|---|---|---|---|
| 130-806B | 8.30 | 130-806B-2H-2,29-31 | P. obliquiloculata | calcite shell | 397 | 0.74 | -25.9 | |
| 130-806B | 9.00 | 130-806B-2H-2,99-101 | P. obliquiloculata | calcite shell | 432 | 1.02 | -18.9 | |
| 130-806B | 16.10 | 130-806B-3H-1,9-11 | P. obliquiloculata | calcite shell | 785 | 0.95 | -40.7 | |
| 130-806B | 16.50 | 130-806B-3H-1,49-51 | P. obliquiloculata | calcite shell | 804 | 1.22 | -22.5 | |
| 138-851A | 1.35 | 138-851A-1H-01,135-140 | Carbonate | 0.5 N acetic acid leachate | 0.70 | -6.2 | 81.55 | |
| 138-851A | 1.35 | 138-851A-1H-01,135-140 | Pore water | 189.00 | -30.5 | |||
| 138-851B | 195.70 | 138-851B-21X-05,142-150 | Carbonate | 0.5 N acetic acid leachate | 0.30 | -31.0 | 79.64 | |
| 138-851B | 195.70 | 138-851B-21X-05,142-150 | Pore water | 66.60 | -53.3 |