Spatio-temporal constraints on thrusting across fold-and-thrust belts worldwide

Area of Science:

• Geology
• Tectonics
• Structural Geology

Background:

• Fold-and-thrust belts (FTBs) are crucial geological structures.
• Reconstructing their evolution requires accurate timing of thrusting events.
• Current dating methods present uncertainties and inconsistencies.

Purpose of the Study:

• To refine the understanding of fold-and-thrust belt evolution.
• To integrate diverse geological data for improved spatio-temporal reconstructions.
• To develop a revised model for FTB propagation.

Main Methods:

• Compilation and integration of stratigraphic, thermochronological, and radiometric data.
• Assessment of strengths and limitations of different dating techniques.
• Construction and comparison of space-time (s-t) graphs for ten FTBs.

Main Results:

• Identified consistent thrusting patterns across diverse geodynamic settings.
• Observed a piggy-back propagation style with long-lasting, overlapping thrust activity.
• Demonstrated the utility of integrated data for refining FTB models.

Conclusions:

• FTB evolution is characterized by prolonged, synchronous thrust activity within a forward-propagating system.
• A revised piggy-back model better explains observed thrusting patterns.
• Integrated geochronological data enhance spatio-temporal reconstructions of FTBs.