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Re-Os и Pt-Os системы

Re-Os и Pt-Os системы. l 190 =1.477 × 10 –12 год –1 ( Begemann et al., 2001). l 187 =1.666 × 10 –11 год –1 (Smoliar et al., 1996). Walker R.J. et al., 1997. Geochimica et Cosmo- chimica Acta. V. 61. P.4799-4807. T=251.2±0.3 My ( Kamo et al., 1996).

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Re-Os и Pt-Os системы

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  1. Re-Os и Pt-Os системы

  2. l190=1.477×10–12 год–1 (Begemann et al., 2001) l187=1.666×10–11 год–1 (Smoliar et al., 1996)

  3. Walker R.J. et al., 1997.Geochimica et Cosmo- chimica Acta. V. 61. P.4799-4807. T=251.2±0.3 My (Kamo et al., 1996)

  4. Allegre C.J., Birck J.L., et al. Age of the Deccan Traps Using Re-187-Os-187 Systematics. // Earth and Planetary Science Letters. 1999. 170(3): 197-204.

  5. Повторные анализы двух образцов ренита (ReS2) с вулкана Кудрявый (о.Итуруп).

  6. Jiantang Peng, Mei-Fu Zhou, Ruizhong Hu, Nengping Shen, Shunda Yuan, Xianwu Bi, Andao Du, Wenjun Qu. Precise molybdenite Re–Os and mica Ar–Ar datingof the Mesozoic Yaogangxian tungsten deposit, central Nanlingdistrict, South China Minerlium Deposita (2006) 41: 661–669 Fig. 3 PhotographsoforeveinsfromtheYaogangxiantungstendeposit, SouthChina. a- Quartz–molybdeniteorevein. b- Quartz–molybdeniteorevein. c- Quartz–feldspar–phlogopite–sulfidevein. d- Quartz–muscovitevein

  7. Fig. 4 187Re–187Os isochrondiagramforeightmolybdenitesamplesfromtheYaogangxiantungstendeposit, SouthChina Fig. 5 40Ar/39Ar agespectrumforphlogopite (a) andmuscovite (b) fromtheYaogangxiandeposit, SouthChina

  8. Задача 19. • Рассчитать возраст молибденита, в котором обнаружены Re и 187Os в следующих количествах: AW187Os=186.956

  9. Puchtel I.S., Brugmann G.E., et al. Precise Re-Os Mineral Isochron and Pb-Nd-Os Isotope Systematics of a Mafic-Ultramafic Sill in the 2.0 Ga Onega Plateau (Baltic Shield). // Earth and Planetary Science Letters. 1999. 170(4): 447-461.

  10. Puchtel I.S., Brugmann G.E., et al. Precise Re-Os Mineral Isochron and Pb-Nd-Os Isotope Systematics of a Mafic-Ultramafic Sill in the 2.0 Ga Onega Plateau (Baltic Shield). // Earth and Planetary Science Letters. 1999. 170(4): 447-461.

  11. (MSWD=108)

  12. Содержание Re и PGE в мантии (PUM: Becker et al., Geochimica et Cosmochimica Acta. 2006. V.70. P.4528–4550)(CI: Horan et al. Chemical Geology. 2003. V.196. P.5-20)

  13. Задача 20.Рассчитать современное 187Os/188Os в мантии, если Re/Os отношение в мантиина 8.4% выше хондритового, а начальные изотопные отношения осмия в этих резервуарах были одинаковые.

  14. Ertel et al., 2006

  15. E. Cottrell , D. Walker. Geochimica et CosmochimicaActa. Vol.70 (2006) p.1565–1580

  16. Самородные платиноиды: Bird et al., EPSL, 1999. V.170. P.83-92

  17. Задача 21. • Рассчитать модельный возраст образцаиридосмина относительно мантийного источника, если выделенный из него осмий имеет указанное в таблице 187Os/188Os. Представить результат графически.

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