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Updated: Nov 17, 2025

Isolation of Quartz Grains for Optically Stimulated Luminescence OSL Dating of Quaternary Sediments for Paleoenvironmental Research
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Orogenic quiescence in Earth's middle age.

Ming Tang1, Xu Chu2, Jihua Hao3,4

  • 1Key Laboratory of Orogenic Belt and Crustal Evolution, MOE; School of Earth and Space Science, Peking University, Beijing 100871, China. mingtang@pku.edu.cn.

Science (New York, N.Y.)
|February 12, 2021
PubMed
Summary
This summary is machine-generated.

Earth's mountain-building history reveals thickest crust in the Archean and Phanerozoic. The Proterozoic saw reduced mountain activity due to supercontinents, potentially hindering life's evolution.

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Area of Science:

  • Geology
  • Geochemistry
  • Paleontology

Background:

  • Mountain belts are crucial for nutrient cycling, influencing denudation and hydrology.
  • Understanding long-term mountain-building processes is key to Earth's surface evolution.

Purpose of the Study:

  • To reconstruct mountain-building history using geochemical proxies.
  • To investigate the relationship between continental crust thickness and orogenic activity over geological time.

Main Methods:

  • Utilized europium anomalies in detrital zircons as a proxy for tracking mountain-building.
  • Analyzed variations in active continental crust thickness across geological eons.

Main Results:

  • Continental crust thickness peaked in the Archean and Phanerozoic eons.
  • The Proterozoic eon exhibited a continuous decrease in crustal thickness, with minimal orogenesis.
  • Prolonged orogenic quiescence in the Proterozoic is linked to the Nuna-Rodinia supercontinent.

Conclusions:

  • Supercontinent cycles significantly impact mantle thermal structure and lithospheric strength, influencing mountain formation.
  • The lack of significant mountain-building in the Proterozoic may have led to oceanic nutrient limitation and stalled evolutionary progress.