The modern analytical data, such as apatite and zircon fission track data and U-Pb geochronology of detrital zircons, which help constraining main tectonic events and related paleogeography, are extremely scarce or even totally absent over large parts of the East Siberian Craton. As a result, tectonic uplift and erosion events, as well as provenance and clastic transport history during formation of main siliciclastic reservoir-prone sedimentary successions are poorly constrained.
The proposed multiclient regional study is designed to revisit geological history and paleogeography of the southern East Siberian Craton using new analytical results, such as U-Pb detrital zircon geochronology, Apatite & Zircon fission track data and other results of modern isotopic methods, with further integration of the obtained analytical results with regional lithostratigraphy and seismic stratigraphy.
The study addresses the following topics:
The proposed multiclient regional study is designed to revisit geological history and paleogeography of the southern East Siberian Craton using new analytical results, such as U-Pb detrital zircon geochronology, Apatite & Zircon fission track data and other results of modern isotopic methods, with further integration of the obtained analytical results with regional lithostratigraphy and seismic stratigraphy.
The study addresses the following topics:
- Phases of tectonic compression and extension and related structural styles.
- Foreland deformation zones and possibilities for sub-thrust plays.
- Neoproterozoic paleogeography: Reconstruction of clastic provenance areas during rift phase.
- Vendian-Cambrian paleogeography: Reconstruction of provenance areas during deposition of clastic successions. Timing of deformation and erosion along the southern margin of the craton.
- Ordovician clastic wedge: Deciphering interplay between intra-platform and external (orogenic) clastic sources. Timing of deformation and erosion along the southern and south-western margin of the craton during Caledonian orogeny.
- Late Paleozoic paleogeography : Deciphering interplay between intra-platform clastic sources (Devonian horsts) and southwesterly located external Uralian (orogenic) clastic sources. Timing of deformation phases during Late Paleozoic orogeny.
- Mesozoic paleogeography: Deciphering interplay between various clastic sources (intra-platform highs, Aldan Shield, Stanovoi and Verkhoyansk orogens); initiation of the Paleo-Lena river system; timing of uplift and erosion in source regions.
REPORT OUTLINE (PROVISIONAL)
Table of Contents |
EXECUTIVE SUMMARY 1. INTRODUCTION 2. TECTONIC SETTING AND MAIN STRUCTURAL ELEMENTS 3. ARCHEAN-PALAEOPROTEROZOIC BASEMENT: STRUCTURAL SUBDIVISION AND AGE OF CONSOLIDATION 4. SEDIMENTARY COVER: STRUCTURAL SUBDIVISION 5. REGIONAL LITHOSTRATIGRAPHIC FRAMEWORK 3.1. Meso- & Neoproterozoic 3.2. Uppermost Neoproterozoic (Vendian) 3.2. Palaeozoic 3.3. Mesozoic 6. CLASTIC SEDIMENT PROVENANCE 7. ANALYTICAL RESULTS 7.1. U-Pb detrital zircon geochronology 7.2. Non-organic geochemistry 7.3. Heavy minerals study 8. PALEOGEOGRAPHY 8.1. Neoproterozoic 8.2. Vendian-Cambrian 8.3. Ordovician 8.4. Late Paleozoic 8.5. Mesozoic 9. TECTONIC DEFORMATION PHASES AND STYLES 9.1. Uplift/erosion phases and timing based on Apatite and/or Zircon fission track data 9.2. Phases of tectonic compression and extension and related structural styles 9.3. Foreland deformation zones and related structural styles 10. THERMAL HISTORY OF SOUTHERN EAST SIBERIA 10.1. Vitrinite reflectance data 10.1. Heat flow data11. BASIN MODELING RESULTS (2D) 12. CONCLUSION 13. REFERENCE LIST |
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