1 / 26

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).

nowles
Télécharger la présentation

Re-Os и Pt-Os системы

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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.

More Related