Nowe doniesienia z wnętrza Ziemi

• Autorzy: Grabarczyk Anna , Wiszniewska Janina , Ruszkowski Michał

Warianty tytułu

EN

New reports from the Earth inside

• Języki publikacji: PL

Abstrakty

EN

A new research has been done on the high pressure minerals from the Earth’s Mantle Transition and Lower Zone. The Earth’s Mantle extends from the “Moho” (Mohoroviè) discontinuity down to a depth of 2,900 km and constitutes 83% of the Earth’s volume and 67% of its mass.The mantle is further divided into two seismic regions: the upper and thelower mantle separated by a seismic zone of discontinuity at a depth of 670 km, which is also the maximum depth to which subducted lithospheric plates can reach. The additional discontinuity zone, i.e. a depth of 410 km together with a zone of 670 km, corresponds to the transformation site of the silicate mineral structure, which also affects the speed of propagation of seismic waves. Mantle peridotite samples indicate that olivine is the main component of the uppermost part of the upper mantle, up to adepth of 410 km. At greater depths, down to 660 km, in the so-called Transition, transformation of olivine into its high-pressure poly-morphs (wadsleyite and ringwoodite) showing a spinel structure, is observed. Experimental research data on natural bridgmanite((Mg, Fe)SiO₃), which exhibits a perovskite structure and is the main mineral of the lower mantle and the most common mineral in the Earth, have been presented. The problem of nitrogen and water amounts in the Earth’s lower mantle and a content of new iron polymorphs in the Earth’s core have also been discussed.

Słowa kluczowe

PL

płaszcz Ziemi; rdzeń Ziemi; bridgemanit; Ca-perowskit; ringwoodyt; ferroperyklaz

EN

Earth Mantle; Earth Core; bridgemanite; Ca-perovskite; ringwoodite; ferri-periclase

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Przegląd Geologiczny
• Rocznik: 2019
• Tom: Vol. 67, nr 10
• Strony: 812--816
• Opis fizyczny: Biblogr. 15 poz., rys., wykr.

Twórcy

autor

Grabarczyk Anna

• Wydział Geologii, Uniwersytet Warszawski, ul. Ż̄wirki i Wigury 93, 02-089 Warszawa

autor

Wiszniewska Janina

• Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy, ul. Rakowiecka 4, 00-975 Warszawa

autor

Ruszkowski Michał

• Wydział Geologii, Uniwersytet Warszawski, ul. Ż̄wirki i Wigury 93, 02-089 Warszawa

Bibliografia

• 1. BOBROV A.V., LITVIN Y.U.A., BINDI L., DYMSHITS A.M. 2008 - Phase relations and formation of sodium-rich majorite garnet in the system Mg3Al2Si3O12-Na2MgSi5O12 at 7.0 and 8.5 GPa. Contributions to Mineralogy and Petrology, 156 (2): 243-257.
• 2. BOBROV A.V., MATROSOVA E.A., BINDI L., TAMAROVA A.P., PUSHCHAROVSKY D.YU., IRIFUNE T. 2018 - Minor elements in bridgmanite: experimental and natural data. Proceedings of XXXV International Conference „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 3. FUKUYAMA K., KAGI H., INOUE T., SHINMEI T., KAKIZAWA S., TAKAHATA N., SANO Y. 2018 - Incorporation of the nitrogen into lower-mantle minerals from high P-T experiments under controlled Fe-FeO buffer. Proceedings of XXXV International Conference „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 4. INOUE T., KAKIZAWA S., KURIBAYASHI T., NODA M., SAKAMOTO N., YURIMOTO H., SANO-FURUKAWA A., HATTORI T. 2018 - Existence of water in the lower mantle. Proceedings of XXXV International Conference „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 5. KAMINSKY F.V., ZAKHARCHENKO O.D., DAVIES R., GRIFFIN W.L., KHACHATRYAN-BLINOVA G.K., SHIRYAEV A.A. 2001 - Superdeep diamonds from Juina area, Mato Grosso State, Brazil. Contributions to Mineralogy and Petrology, 140: 734-753.
• 6. KAMINSKY F. 2012 - Mineralogy of the lower mantle: A review of 'super-deep' mineral inclusions in diamond. Earth-Science Reviews, 110 (1-4): 127-147.
• 7. KAMINSKY F.V. 2018 - Water in the Earth’s lower mantle. Proceedings of XXXV International Conference „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 8. NODA M., KAKIZAWA S., INOUE T. 2018 - Al substitution mechanism in anhydrous bridgmanite as a function of Al content. „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 9. PALOT M., JACOBSEN S.D., TOWNSEND J.P., NESTOLA F., MARQUARDT K., MIYAJIMA N., HARRIS J.W., STACHEL T., MCCAMMON C.A., PEARSON D.G. 2016 -Evidence for H2O-bearing fluids in the lower mantle from diamond inclusion. Lithos, 265: 237-243.
• 10. PEARSON D.G., BRENKER F.E., NESTOLA F., MCNEILL J., NASDALA L., HUTCHISON M.T., HUTCHISON S., MATVEEV K., MATHER G., SILVERSMIT S., SCHMITZ B., VEKEMANS B., VINCZE L. 2014 - Hydrous mantle transition zone indicated by ringwoodite included within diamond. Nature, 507: 221.
• 11. PUSHCHAROVSKY D. YU. 2018 - Fe in the Earth’s core: new data and new ideas. Proceedings of XXXV International Conference „Magmatism of the Earth and Related Strategic Metal Deposits 2018”, Moscow, 3-7.09.2018. Mat. konf.
• 12. RINGWOOD A.E. 1991 -Phase transformations and their bearing on the constitution and dynamics of the mantle. Geochimica et Cosmochimica Acta, 55 (8): 2083-2110.
• 13. MCDONOUGH W.F., SUN S.S. 1995 - The composition of the Earth. Chemical geology, 120 (3-4): 223-253.
• 14. WANG T., SONG X., XIA H.H. 2015 - Equatorial anisotropy in the inner part of Earth’s inner core from autocorrelation of earthquake coda. Nature Geoscience, 8 (3): 224.
• 15. WILSON M. 1989 - Partial melting processes in the Earth’s upper mantle [W:] Igneous petrogenesis. A global tectonic approach. Unwin Hyman, London.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).