New volcano-tectonic morphostructure in case of a 42-km deep-sea calderoida at Detroit  seamount rise (NW Pacific Ocean)

I. V. Melekestsev

doi:10.7868/S0435428118030070

New volcano-tectonic morphostructure in case of a 42-km deep-sea calderoida at Detroit seamount rise (NW Pacific Ocean)

I. V. Melekestsev

https://doi.org/10.7868/S0435428118030070

Full Text:

PDF (Rus) |

Generate QR code

Abstract

The volcano-tectonic and tephrachronological analysis and available materials regarding the northern edge of the Emperor Seamount Chain allowed for the first time to detect the unknown circled volcano-tectonic 42-km deep-sea morphostructure known as calderoida (author's terminology) lying at –2900–2200 m depth. It is structurally complex and broken by faults into blocks of different sizes and shapes. It refers to the northern portion of the Detroit Seamount Rise (NW Pacific Ocean) and is a Pliocene horst that was formed in the Early Pleistocene at depths from –3000 to –2000 m. Its close analogues have not yet been found on Earth, but similar objects do probably exist on Venus.

Keywords

deep-sea calderoida, volcano-tectonic morphostructure, seamount, horst, tephra, tephrachronology, tephraturbidite

About the Author

I. V. Melekestsev

Institute of Volcanology and Seismology FEB RAS, Petropavlovsk-Kamchatskiy
Russian Federation

References

1. Mezhdunarodniy geologo-geofizicheskiy atlas Tikhogo okeana (International geological-geophysical atlas of the Pacific Ocean). Udintsev G.B. Ed. Mosсow-St.Petersburg: IOC (of UNESCO), Russian Ac. Sci., FSUE MPA, “Kartografija”, GUNiO (Publ.). 2003. 193 p.

2. Cruise Reports. Sonne Cruise SO-201. Leg 2. 2009. 134 p.

3. Duncan R.A. and Keller R.A.Radiometric ages for basement rocks from the Emperor Seamounts, ODR Leg 197. Geochem. Geophys., Geosyst.2004. № 5. Q08L03. DOI: 10.1029/2004G000704.

4. Keller R.A., Fisk M.R., and Duncan R.A. Geochemistry and 40Ar/39Ar geochronology of basalts from ODP Leg 145. Proc. Ocean Drill. Program Sci. Results. 1995. Vol. 145. P. 333–344.

5. Proceeding of the Ocean Drilling Program Scientific Results. Rea D.K., Basov L.A., Scholl D.W., and Allan J.F. (Eds.). 1995. Vol. 145. 382 p.

6. Shipboard Scientific Party. Leg 197 summary. Proc. Ocean Drill. Program Initial Results. 2002. Vol. 197. 92 p.

7. Tarduno J.A., Duncan R.A., and Scholl D.W. Proc. of the Oceans Drill. Program, Initial Reports. 2002. Vol. 197. 192 p.

8. Kamchatka, Kurilskie i Komandorskie ostrova (Kamchatka, Kurile and Commander Islands). Mosсow: Nauka (Publ.), 1974. 440 p.

9. Melekestsev I.V. and Kurbatov A.V. Frequency of large paleoearthquakes at the Northwestern coast of the Bering Sea and in the Kamchatka basin during late Pleistocene/Holocene time. Vulkanol. Seismol. 1997. No 3. P. 3–11. (in Russ.)

10. Melekestsev I.V., Kurbatov A.V., Pevzner M.M., and Sulerzhitskiy L.D. Prehistoric tsunamis and large earthquakes on the Kamchatskiy Peninsula, Kamchatka, based on tephrochronological data. Vulkanol. Seismol. 1994. No 5. P. 106–115. (in Russ.)

11. Melekestsev I.V. Vulkanizm i rel’efoobrazovanie (Volcanism and relief-forming). Moscow: Nauka (Publ.), 1980. 212 p.

12. Vlodavets V.I. Spravochnik po vulkanologii (Hand book on volcanology). Moscow: Nauka (Publ.), 1984. 332 p.

13. Tolkoviy slovar’ angliyskikh geologicheskikh terminov (Glossary of English geological terms). M.: Mir (Publ.), 1977. Vol. 1. 588 p.

14. Sparrow G. Planets. Puteshestvie po Solnechnoy sisteme (The Planets. A Journey through the Solar System). SPb.: TID Amfora (Publ.), 2008. 224 p.

15. Zasova L.V. The wonderful and unknown Venus. Priroda. 2015. No. 10. P. 11–20. (in Russ.)

Review

For citations:

Melekestsev I.V. New volcano-tectonic morphostructure in case of a 42-km deep-sea calderoida at Detroit seamount rise (NW Pacific Ocean). Geomorfologiya. 2018;(3):82-92. (In Russ.) https://doi.org/10.7868/S0435428118030070