安第斯山脉的崛起。

Rise of the Andes.

作者信息

Garzione Carmala N, Hoke Gregory D, Libarkin Julie C, Withers Saunia, MacFadden Bruce, Eiler John, Ghosh Prosenjit, Mulch Andreas

机构信息

Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, USA.

出版信息

Science. 2008 Jun 6;320(5881):1304-7. doi: 10.1126/science.1148615.

DOI:10.1126/science.1148615

PMID:18535236

Abstract

The surface uplift of mountain belts is generally assumed to reflect progressive shortening and crustal thickening, leading to their gradual rise. Recent studies of the Andes indicate that their elevation remained relatively stable for long periods (tens of millions of years), separated by rapid (1 to 4 million years) changes of 1.5 kilometers or more. Periodic punctuated surface uplift of mountain belts probably reflects the rapid removal of unstable, dense lower lithosphere after long-term thickening of the crust and lithospheric mantle.

摘要

山脉带的地表隆升通常被认为反映了逐渐缩短和地壳增厚，从而导致它们逐渐上升。最近对安第斯山脉的研究表明，其海拔在很长一段时间（数千万年）内保持相对稳定，期间被快速（100万至400万年）的1.5公里或更大幅度的变化所分隔。山脉带周期性的间断性地表隆升可能反映了在地壳和岩石圈地幔长期增厚之后，不稳定、高密度的岩石圈下部被快速移除。