1 / 21

Timanian Orogeny and Late Neoproterozoic Subduction

Explore the Timanian Orogeny and Late Neoproterozoic Subduction with insights on the extent, geometry, and foreland basin of this geological event. Discover the age of overlying sediments, ophiolites, and more.

maxwellb
Download Presentation

Timanian Orogeny and Late Neoproterozoic Subduction

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. TIMANIAN OROGENY AND LATE NEOPROTEROZOIC SUBDUCTION V. PEASE, STOCKHOLM UNIVERSITY

  2. EXTENT OF TIMANIAN OROGENY PEASE et al., IN PRESS

  3. GEOMETRY OF TIMANIAN OROGENY

  4. FORELAND BASIN

  5. FORELAND BASIN GRAZDANKIN, 2004; MARTIN et al., 2000

  6. LORENTZ et al., 2004

  7. FORELAND FOLD & THRUST BELT LORENTZ et al., 2004

  8. LORENTZ et al., 2004

  9. PECHORA ZONE MAFIC COMPLEX

  10. HINTERLAND REGIONAL UNCONFORMITY & RETURN TO PASSIVE MARGIN • AGE OF OVERLYING • SEDIMENTS <500 Ma • (PEASE, UNPUBLISHED DATA) • AGE OF NEOPROTEROZOIC • OPHIOLITES ca. 670 Ma • (KHAIN ET AL, 1999)

  11. KVARKUSH BLUESCHIST • 350-400°C • 7-8 Kilobars • 540 Ma BECKHOLMEN& GLODNY, 2005

  12. TIMANIAN OROGENESIS ONSET? ±600 Ma PEAK METAMORPHISM? ±550 Ma (REGIONAL P/T 600°C, 25-28 KM) STRUCTURAL STYLE? NW-STRIKING, SW-THRUSTING, OCEAN/ARC- CONTINENT COLLISION END? 500 Ma

  13. TECTONIC RECONSTRUCTIONS

  14. REGIONAL OVERVIEW

  15. CRITERIA FOR SUBDUCTION TECTONICS • OPHIOLITES • BLUESCHISTS • UHP METAMORPHISM NO SMOKING GUN, BUT….. STERN, 2005

  16. THE NEOPROTEROZOIC TIMANIDE OROGEN OF EASTERN BALTICA eds. GEE & PEASE GEOL. SOC. LONDON MEMOIR 30, 2004 * * *

More Related