-
1
-
-
0026437380
-
-
S. R. Hart, E. H. Hauri, L. A. Oschmann, J. A. Whitehead, Science 256, 517 (1992).
-
(1992)
Science
, vol.256
, pp. 517
-
-
Hart, S.R.1
Hauri, E.H.2
Oschmann, L.A.3
Whitehead, J.A.4
-
2
-
-
2642627288
-
-
Brookfield Press
-
F. D. Stacey, Physics of the Earth (Brookfield Press, 1992); D. L. Anderson, Earth Planet. Sci. Lett. 128, 303 (1994); M. Liu, Science 264, 1904 (1994).
-
Physics of the Earth
, vol.1992
-
-
Stacey, F.D.1
-
3
-
-
0028585726
-
-
F. D. Stacey, Physics of the Earth (Brookfield Press, 1992); D. L. Anderson, Earth Planet. Sci. Lett. 128, 303 (1994); M. Liu, Science 264, 1904 (1994).
-
(1994)
Earth Planet. Sci. Lett.
, vol.128
, pp. 303
-
-
Anderson, D.L.1
-
4
-
-
0028094636
-
-
F. D. Stacey, Physics of the Earth (Brookfield Press, 1992); D. L. Anderson, Earth Planet. Sci. Lett. 128, 303 (1994); M. Liu, Science 264, 1904 (1994).
-
(1994)
Science
, vol.264
, pp. 1904
-
-
Liu, M.1
-
5
-
-
2642659022
-
-
note
-
D″ is the lowermost 200 km of the mantle. It is characterized by distinct seismic discontinuities relative to the overlying mantle.
-
-
-
-
6
-
-
0024876610
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1989)
Geophys. Res. Lett.
, vol.16
, pp. 609
-
-
Knittle, E.1
Jeanloz, R.2
-
7
-
-
0029659883
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1996)
Science
, vol.273
, pp. 1528
-
-
Williams, Q.1
Garnero, E.J.2
-
8
-
-
0027430470
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1993)
Geophys. Res. Lett.
, vol.20
, pp. 379
-
-
Kellog, L.H.1
King, S.D.2
-
9
-
-
0027798929
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1993)
J. Geomag. Geoelectr.
, vol.45
, pp. 1221
-
-
Poirier, J.-P.1
-
10
-
-
0030292011
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1996)
Geophys. Res. Lett.
, vol.23
, pp. 3091
-
-
Manga, M.1
Jeanloz, R.2
-
11
-
-
0031278040
-
-
E. Knittle and R. Jeanloz, Geophys. Res. Lett. 16, 609 (1989); Q. Williams and E. J. Garnero, Science 273, 1528 (1996); L. H. Kellog and S. D. King, Geophys. Res. Lett. 20, 379 (1993); J.-P. Poirier, J. Geomag. Geoelectr. 45, 1221 (1993); M. Manga and R. Jeanloz, Geophys. Res. Lett. 23, 3091 (1996); L. H. Kellog, ibid 24, 2749 (1997).
-
(1997)
Geophys. Res. Lett.
, vol.24
, pp. 2749
-
-
Kellog, L.H.1
-
12
-
-
0025642261
-
-
R. Jeanloz, Annu. Rev. Earth Planet. Sci. 18, 357 (1990). F. Goarant, F. Guyot, J. Peyronneau, J.-P. Poirier, J. Geophys. Res. 97, 4477 (1992); Y. Song and T. J. Ahrens, Geophys. Res. Lett. 21, 153 (1994); E. Ito, K. Morooka, O. Ujike, T. Katsura, J. Geophys. Res. 100, 5901 (1995); T. L. Lay, Q. Williams, E. J. Garnero, Nature 392, 461 (1998).
-
(1990)
Annu. Rev. Earth Planet. Sci.
, vol.18
, pp. 357
-
-
Jeanloz, R.1
-
13
-
-
0026472173
-
-
R. Jeanloz, Annu. Rev. Earth Planet. Sci. 18, 357 (1990). F. Goarant, F. Guyot, J. Peyronneau, J.-P. Poirier, J. Geophys. Res. 97, 4477 (1992); Y. Song and T. J. Ahrens, Geophys. Res. Lett. 21, 153 (1994); E. Ito, K. Morooka, O. Ujike, T. Katsura, J. Geophys. Res. 100, 5901 (1995); T. L. Lay, Q. Williams, E. J. Garnero, Nature 392, 461 (1998).
-
(1992)
J. Geophys. Res.
, vol.97
, pp. 4477
-
-
Goarant, F.1
Guyot, F.2
Peyronneau, J.3
Poirier, J.-P.4
-
14
-
-
0028192993
-
-
R. Jeanloz, Annu. Rev. Earth Planet. Sci. 18, 357 (1990). F. Goarant, F. Guyot, J. Peyronneau, J.-P. Poirier, J. Geophys. Res. 97, 4477 (1992); Y. Song and T. J. Ahrens, Geophys. Res. Lett. 21, 153 (1994); E. Ito, K. Morooka, O. Ujike, T. Katsura, J. Geophys. Res. 100, 5901 (1995); T. L. Lay, Q. Williams, E. J. Garnero, Nature 392, 461 (1998).
-
(1994)
Geophys. Res. Lett.
, vol.21
, pp. 153
-
-
Song, Y.1
Ahrens, T.J.2
-
15
-
-
0028830330
-
-
R. Jeanloz, Annu. Rev. Earth Planet. Sci. 18, 357 (1990). F. Goarant, F. Guyot, J. Peyronneau, J.-P. Poirier, J. Geophys. Res. 97, 4477 (1992); Y. Song and T. J. Ahrens, Geophys. Res. Lett. 21, 153 (1994); E. Ito, K. Morooka, O. Ujike, T. Katsura, J. Geophys. Res. 100, 5901 (1995); T. L. Lay, Q. Williams, E. J. Garnero, Nature 392, 461 (1998).
-
(1995)
J. Geophys. Res.
, vol.100
, pp. 5901
-
-
Ito, E.1
Morooka, K.2
Ujike, O.3
Katsura, T.4
-
16
-
-
0032473957
-
-
R. Jeanloz, Annu. Rev. Earth Planet. Sci. 18, 357 (1990). F. Goarant, F. Guyot, J. Peyronneau, J.-P. Poirier, J. Geophys. Res. 97, 4477 (1992); Y. Song and T. J. Ahrens, Geophys. Res. Lett. 21, 153 (1994); E. Ito, K. Morooka, O. Ujike, T. Katsura, J. Geophys. Res. 100, 5901 (1995); T. L. Lay, Q. Williams, E. J. Garnero, Nature 392, 461 (1998).
-
(1998)
Nature
, vol.392
, pp. 461
-
-
Lay, T.L.1
Williams, Q.2
Garnero, E.J.3
-
17
-
-
2642603854
-
-
note
-
The HSEs consist of Re, Au, and the platinum group elements - Os, Ir, R, Ru, Rh, and Pd. They are so named because of their strong affinity with iron.
-
-
-
-
22
-
-
0025956556
-
-
188Os = 0.119852, using initial chondritic ratios. Recent low-pressure experimental evidence has verified that Pt behaves less compatibly than Os during crystallization of metal from an iron liquid for compositions relevant for the Earth's core, consistent with observations from the iron meteorites (H. V. Lauer Jr. and J. H. Jones, Lunar Planet. Sci. Conf. XXIX, 1796 (1998). Solid metal-liquid metal partition coefficients for HSEs are not sensitive to pressure, so these low-pressure experiments and the iron meteorite data may accurately reflect partitioning behavior at the higher pressures of Earth's core crystallization (J. H. Jones and D. Walker, Earth Planet. Sci. Lett. 105, 127 (1991).
-
(1991)
Science
, vol.252
, pp. 926
-
-
Newsom, H.E.1
Sims, K.2
-
23
-
-
0021054740
-
-
188Os = 0.119852, using initial chondritic ratios. Recent low-pressure experimental evidence has verified that Pt behaves less compatibly than Os during crystallization of metal from an iron liquid for compositions relevant for the Earth's core, consistent with observations from the iron meteorites (H. V. Lauer Jr. and J. H. Jones, Lunar Planet. Sci. Conf. XXIX, 1796 (1998). Solid metal-liquid metal partition coefficients for HSEs are not sensitive to pressure, so these low-pressure experiments and the iron meteorite data may accurately reflect partitioning behavior at the higher pressures of Earth's core crystallization (J. H. Jones and D. Walker, Earth Planet. Sci. Lett. 105, 127 (1991).
-
(1983)
Nature
, vol.302
, pp. 130
-
-
Luck, J.-M.1
Allegre, C.J.2
-
24
-
-
0001046107
-
-
188Os = 0.119852, using initial chondritic ratios. Recent low-pressure experimental evidence has verified that Pt behaves less compatibly than Os during crystallization of metal from an iron liquid for compositions relevant for the Earth's core, consistent with observations from the iron meteorites (H. V. Lauer Jr. and J. H. Jones, Lunar Planet. Sci. Conf. XXIX, 1796 (1998). Solid metal-liquid metal partition coefficients for HSEs are not sensitive to pressure, so these low-pressure experiments and the iron meteorite data may accurately reflect partitioning behavior at the higher pressures of Earth's core crystallization (J. H. Jones and D. Walker, Earth Planet. Sci. Lett. 105, 127 (1991).
-
(1986)
J. Geophys. Res.
, vol.91
, pp. 12375
-
-
Morgan, J.W.1
-
25
-
-
0343724477
-
-
188Os = 0.119852, using initial chondritic ratios. Recent low-pressure experimental evidence has verified that Pt behaves less compatibly than Os during crystallization of metal from an iron liquid for compositions relevant for the Earth's core, consistent with observations from the iron meteorites (H. V. Lauer Jr. and J. H. Jones, Lunar Planet. Sci. Conf. XXIX, 1796 (1998). Solid metal-liquid metal partition coefficients for HSEs are not sensitive to pressure, so these low-pressure experiments and the iron meteorite data may accurately reflect partitioning behavior at the higher pressures of Earth's core crystallization (J. H. Jones and D. Walker, Earth Planet. Sci. Lett. 105, 127 (1991).
-
(1998)
Lunar Planet. Sci. Conf.
, vol.29
, pp. 1796
-
-
Lauer Jr., H.V.1
Jones, J.H.2
-
26
-
-
0026302135
-
-
188Os = 0.119852, using initial chondritic ratios. Recent low-pressure experimental evidence has verified that Pt behaves less compatibly than Os during crystallization of metal from an iron liquid for compositions relevant for the Earth's core, consistent with observations from the iron meteorites (H. V. Lauer Jr. and J. H. Jones, Lunar Planet. Sci. Conf. XXIX, 1796 (1998). Solid metal-liquid metal partition coefficients for HSEs are not sensitive to pressure, so these low-pressure experiments and the iron meteorite data may accurately reflect partitioning behavior at the higher pressures of Earth's core crystallization (J. H. Jones and D. Walker, Earth Planet. Sci. Lett. 105, 127 (1991).
-
(1991)
Earth Planet. Sci. Lett.
, vol.105
, pp. 127
-
-
Jones, J.H.1
Walker, D.2
-
29
-
-
34249918572
-
-
R. J. Walker, L. M. Echeverra, S. B. Shirey, M. F. Horan, Contrib. Mineral. Petrol. 107, 150 (1991); E. H. Hauri and S. R. Hart, Earth Planet. Sci. Lett. 114, 353 (1993); L. C. Reisberg et al., ibid. 120, 149 (1993); F. Marcantonio, A. Zindler, T. Elliot, H. Staudigel, ibid. 133, 397 (1995).
-
(1991)
Contrib. Mineral. Petrol.
, vol.107
, pp. 150
-
-
Walker, R.J.1
Echeverra, L.M.2
Shirey, S.B.3
Horan, M.F.4
-
30
-
-
0027498547
-
-
R. J. Walker, L. M. Echeverra, S. B. Shirey, M. F. Horan, Contrib. Mineral. Petrol. 107, 150 (1991); E. H. Hauri and S. R. Hart, Earth Planet. Sci. Lett. 114, 353 (1993); L. C. Reisberg et al., ibid. 120, 149 (1993); F. Marcantonio, A. Zindler, T. Elliot, H. Staudigel, ibid. 133, 397 (1995).
-
(1993)
Earth Planet. Sci. Lett.
, vol.114
, pp. 353
-
-
Hauri, E.H.1
Hart, S.R.2
-
31
-
-
0027833420
-
-
R. J. Walker, L. M. Echeverra, S. B. Shirey, M. F. Horan, Contrib. Mineral. Petrol. 107, 150 (1991); E. H. Hauri and S. R. Hart, Earth Planet. Sci. Lett. 114, 353 (1993); L. C. Reisberg et al., ibid. 120, 149 (1993); F. Marcantonio, A. Zindler, T. Elliot, H. Staudigel, ibid. 133, 397 (1995).
-
(1993)
Earth Planet. Sci. Lett.
, vol.120
, pp. 149
-
-
Reisberg, L.C.1
-
32
-
-
0029530936
-
-
R. J. Walker, L. M. Echeverra, S. B. Shirey, M. F. Horan, Contrib. Mineral. Petrol. 107, 150 (1991); E. H. Hauri and S. R. Hart, Earth Planet. Sci. Lett. 114, 353 (1993); L. C. Reisberg et al., ibid. 120, 149 (1993); F. Marcantonio, A. Zindler, T. Elliot, H. Staudigel, ibid. 133, 397 (1995).
-
(1995)
Earth Planet. Sci. Lett.
, vol.133
, pp. 397
-
-
Marcantonio, F.1
Zindler, A.2
Elliot, T.3
Staudigel, H.4
-
33
-
-
0026049855
-
-
C. E. Martin, Geochim. Cosmochim. Acta 55, 1421 (1991); W. J. Pegram and C. J. Allegre, Earth Planet. Sci. Lett. 111, 59 (1992); C. E. Martin, R. W. Carlson, S. B. Shirey, F. A. Frey, C.-Y. Chen, ibid. 128, 287 (1994); M. Roy-Barman and C. J. Allegre, ibid. 129, 145 (1995).
-
(1991)
Geochim. Cosmochim. Acta
, vol.55
, pp. 1421
-
-
Martin, C.E.1
-
34
-
-
0026613548
-
-
C. E. Martin, Geochim. Cosmochim. Acta 55, 1421 (1991); W. J. Pegram and C. J. Allegre, Earth Planet. Sci. Lett. 111, 59 (1992); C. E. Martin, R. W. Carlson, S. B. Shirey, F. A. Frey, C.-Y. Chen, ibid. 128, 287 (1994); M. Roy-Barman and C. J. Allegre, ibid. 129, 145 (1995).
-
(1992)
Earth Planet. Sci. Lett.
, vol.111
, pp. 59
-
-
Pegram, W.J.1
Allegre, C.J.2
-
35
-
-
0028583583
-
-
C. E. Martin, Geochim. Cosmochim. Acta 55, 1421 (1991); W. J. Pegram and C. J. Allegre, Earth Planet. Sci. Lett. 111, 59 (1992); C. E. Martin, R. W. Carlson, S. B. Shirey, F. A. Frey, C.-Y. Chen, ibid. 128, 287 (1994); M. Roy-Barman and C. J. Allegre, ibid. 129, 145 (1995).
-
(1994)
Earth Planet. Sci. Lett.
, vol.128
, pp. 287
-
-
Martin, C.E.1
Carlson, R.W.2
Shirey, S.B.3
Frey, F.A.4
Chen, C.-Y.5
-
36
-
-
0028837763
-
-
C. E. Martin, Geochim. Cosmochim. Acta 55, 1421 (1991); W. J. Pegram and C. J. Allegre, Earth Planet. Sci. Lett. 111, 59 (1992); C. E. Martin, R. W. Carlson, S. B. Shirey, F. A. Frey, C.-Y. Chen, ibid. 128, 287 (1994); M. Roy-Barman and C. J. Allegre, ibid. 129, 145 (1995).
-
(1995)
Earth Planet. Sci. Lett.
, vol.129
, pp. 145
-
-
Roy-Barman, M.1
Allegre, C.J.2
-
37
-
-
2642685212
-
-
E. H. Hauri, J. C. Lassiter, D. J. DePaolo, J. Geophys. Res. 101, 11795 (1996); E. H. Hauri, Nature 382, 415 (1996).
-
(1996)
J. Geophys. Res.
, vol.101
, pp. 11795
-
-
Hauri, E.H.1
Lassiter, J.C.2
DePaolo, D.J.3
-
38
-
-
0029662997
-
-
E. H. Hauri, J. C. Lassiter, D. J. DePaolo, J. Geophys. Res. 101, 11795 (1996); E. H. Hauri, Nature 382, 415 (1996).
-
(1996)
Nature
, vol.382
, pp. 415
-
-
Hauri, E.H.1
-
40
-
-
2642694300
-
-
note
-
186Os relative to the chondritic upper mantle (9). The coupled enrichments are consistent with the addition of outer core metal with elevated Re/Os and Pt/Os to the Siberian plume (7, 9, 11).
-
-
-
-
45
-
-
0029530553
-
-
J. E. Snow and L. Reisberg, Earth Planet. Sci. Lett. 133, 411 (1995); T. Meisel, R. J. Walker, J. W. Morgan, Nature 383, 517 (1996).
-
(1995)
Earth Planet. Sci. Lett.
, vol.133
, pp. 411
-
-
Snow, J.E.1
Reisberg, L.2
-
46
-
-
0029663983
-
-
J. E. Snow and L. Reisberg, Earth Planet. Sci. Lett. 133, 411 (1995); T. Meisel, R. J. Walker, J. W. Morgan, Nature 383, 517 (1996).
-
(1996)
Nature
, vol.383
, pp. 517
-
-
Meisel, T.1
Walker, R.J.2
Morgan, J.W.3
-
47
-
-
2642669101
-
-
note
-
187Os. However, enrichments would necessarily also be reflected in lower Os concentrations in the outer core (7). Although the outer core could be more radiogenic, if the lower mantle has approximately the same Os concentration as the upper mantle, the effects would be diluted by the mantle component.
-
-
-
-
49
-
-
2642637523
-
-
note
-
The upper mantle average would be Pt at 6.54 ng/g based on an Os abundance of 3.3 ng/g (11) and a chondritic Pt/Os ratio of 1.984 (data on enstatite chondrites from (9)].
-
-
-
-
50
-
-
0001561887
-
-
M.-J. Hertogen, M.-J. Janssens, H. Palme, Geochim. Cosmochim. Acta 44, 2125 (1980); S.-J. Barnes, A. J. Naldrett, M. P. Gorton, Chem. Geol. 53, 303 (1985); B. J. Fryer and J. D. Greenough, Can. J. Earth Sci. 29, 2329 (1992); G. E. Brugmann et al., Geochim. Cosmochim. Acta 57, 2001 (1993).
-
(1980)
Geochim. Cosmochim. Acta
, vol.44
, pp. 2125
-
-
Hertogen, M.-J.1
Janssens, M.-J.2
Palme, H.3
-
51
-
-
0022268415
-
-
M.-J. Hertogen, M.-J. Janssens, H. Palme, Geochim. Cosmochim. Acta 44, 2125 (1980); S.-J. Barnes, A. J. Naldrett, M. P. Gorton, Chem. Geol. 53, 303 (1985); B. J. Fryer and J. D. Greenough, Can. J. Earth Sci. 29, 2329 (1992); G. E. Brugmann et al., Geochim. Cosmochim. Acta 57, 2001 (1993).
-
(1985)
Chem. Geol.
, vol.53
, pp. 303
-
-
Barnes, S.-J.1
Naldrett, A.J.2
Gorton, M.P.3
-
52
-
-
0027009879
-
-
M.-J. Hertogen, M.-J. Janssens, H. Palme, Geochim. Cosmochim. Acta 44, 2125 (1980); S.-J. Barnes, A. J. Naldrett, M. P. Gorton, Chem. Geol. 53, 303 (1985); B. J. Fryer and J. D. Greenough, Can. J. Earth Sci. 29, 2329 (1992); G. E. Brugmann et al., Geochim. Cosmochim. Acta 57, 2001 (1993).
-
(1992)
Can. J. Earth Sci.
, vol.29
, pp. 2329
-
-
Fryer, B.J.1
Greenough, J.D.2
-
53
-
-
0027387246
-
-
M.-J. Hertogen, M.-J. Janssens, H. Palme, Geochim. Cosmochim. Acta 44, 2125 (1980); S.-J. Barnes, A. J. Naldrett, M. P. Gorton, Chem. Geol. 53, 303 (1985); B. J. Fryer and J. D. Greenough, Can. J. Earth Sci. 29, 2329 (1992); G. E. Brugmann et al., Geochim. Cosmochim. Acta 57, 2001 (1993).
-
(1993)
Geochim. Cosmochim. Acta
, vol.57
, pp. 2001
-
-
Brugmann, G.E.1
-
55
-
-
2642686251
-
-
M. D. Norman and M. O. Garcia, unpublished data
-
M. D. Norman and M. O. Garcia, unpublished data.
-
-
-
-
56
-
-
2642657977
-
-
note
-
Os ≅ 400 (16). See Figure 2 for end-member parameters for mixing calculations.
-
-
-
-
57
-
-
0029753774
-
-
A. D. Brandon, R. A. Creaser, R. W. Carlson, S. B. Shirey, Science 272, 861 (1996); M. Rehkämper, A. N. Halliday, D. Barfod, J. G. Fitton, J. B. Dawson, Science 278, 1595 (1997); M. Humayun, Trans. Am. Geophys. Union 78, F737 (1997).
-
(1996)
Science
, vol.272
, pp. 861
-
-
Brandon, A.D.1
Creaser, R.A.2
Carlson, R.W.3
Shirey, S.B.4
-
58
-
-
0037674444
-
-
A. D. Brandon, R. A. Creaser, R. W. Carlson, S. B. Shirey, Science 272, 861 (1996); M. Rehkämper, A. N. Halliday, D. Barfod, J. G. Fitton, J. B. Dawson, Science 278, 1595 (1997); M. Humayun, Trans. Am. Geophys. Union 78, F737 (1997).
-
(1997)
Science
, vol.278
, pp. 1595
-
-
Rehkämper, M.1
Halliday, A.N.2
Barfod, D.3
Fitton, J.G.4
Dawson, J.B.5
-
59
-
-
0029753774
-
-
A. D. Brandon, R. A. Creaser, R. W. Carlson, S. B. Shirey, Science 272, 861 (1996); M. Rehkämper, A. N. Halliday, D. Barfod, J. G. Fitton, J. B. Dawson, Science 278, 1595 (1997); M. Humayun, Trans. Am. Geophys. Union 78, F737 (1997).
-
(1997)
Trans. Am. Geophys. Union
, vol.78
-
-
Humayun, M.1
-
61
-
-
0028262675
-
-
M. F. Roden, T. Trull, S. R. Hart, F. A. Frey, ibid. 58, 1431 (1994).
-
(1994)
Geochim. Cosmochim. Acta
, vol.58
, pp. 1431
-
-
Roden, M.F.1
Trull, T.2
Hart, S.R.3
Frey, F.A.4
-
62
-
-
2642622232
-
-
A. Tsuru, thesis, University of Maryland, College Park (1997)
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A. Tsuru, thesis, University of Maryland, College Park (1997).
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63
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note
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Supported by National Science Foundation grants EAR-CSEDI 968703 and EAR-CSEDI 970986. Os-Ir alloys were kindly provided by A. M Clarke of the British Museum. T. Mock is gratefully thanked for his help with the mass spectrometry. Many conversations with M. Humayun and J. Lassiter helped clarify arguments presented in this paper. We thank W. McDonough and two anonymous journal reviewers.
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