澳大利亚阿德莱德大学Andrew S. Merdith团队研究了从植物根系到山根：陆生植物对弧形岩浆作用的影响。相关论文发表在2025年5月22日出版的《地质学》杂志上。

陆生植物的进化影响了弧形岩浆作用的假设在地球的生物进化和板块构造之间提供了令人信服的联系。陆生植物改变了陆地环境，增加了河流沉积物的停留时间，加剧了化学风化，增加了粘土产量。将泥质冲积原岩纳入岩浆中，导致反映地表风化程度的δ¹⁸O和指示源物质年龄的εHf之间的相关性强度系统性增加。 

这种εHf/δ¹⁸O相关性在约450 Ma时的出现与陆地植物在从低纬度到高纬度的宽纬度范围内的扩张相吻合。然而，这种同位素信号在多大程度上代表了一种全球现象，而不是由碎屑锆石的不均匀地理采样引起的偏差，这一点一直受到质疑。

研究组证明，这种相关性的转变在单一的长寿命岩浆区内持续存在，支持了同位素转变反映了被岩浆系统同化的沉积物发生根本不可逆变化的假设。这种同位素转变发生在不同古纬度的弧形系统中，表明对纬度控制的气候或生物过程没有可检测的依赖性。因此，-450 Ma后弧岩浆成分的转变仍然是古生代中期地球表面过程变化的关键指标。

附：英文原文

Title: From plant roots to mountain roots: Impact of land plants on arc magmatism

Author: Christopher J. Spencer, Thomas M. Gernon, Neil S. Davies, William J. McMahon, Andrew S. Merdith

Issue&Volume: 2025-05-22

Abstract: The hypothesis that the evolution of land plants influenced arc magmatism offers a compelling link between Earth’s biological evolution and plate tectonics. Land plants transformed terrestrial environments, increasing fluvial sediment residence times, intensifying chemical weathering, and increasing clay production. Incorporating muddier alluvial protolith into magmas resulted in a systematic increase in the strength of correlation between δ18O, which reflects the degree of surface weathering, and εHf, which indicates the age of the source material. The emergence of this εHf/δ18O correlation at ca. 450 Ma coincides with the expansion of land plants across a broad latitudinal range, from low to high latitudes. However, the extent to which this isotopic signal represents a global phenomenon, rather than a bias introduced by uneven geographic sampling of detrital zircon, has been questioned. We demonstrate that this shift in correlation persists within single long-lived magmatic provinces, supporting the hypothesis that the isotopic shift reflects a fundamental irreversible change in sediments assimilated into magmatic systems. This isotopic shift occurs in arc systems at various paleolatitudes, indicating no detectable dependence on latitudinally controlled climatic or biologic processes. Therefore, the post450 Ma shift in arc magma composition remains a key indicator of changing Earth surface processes during the mid-Paleozoic.

DOI: 10.1130/G53235.1

Source: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G53235.1/654558/From-plant-roots-to-mountain-roots-Impact-of-landredirectedFrom=fulltext