The thermal and chemical evolution of rocky planets is controlled by their surface tectonics and magmatic processes. On Earth, magmatism is dominated by plutonism/intrusion versus volcanism/extrusion. However, the role of plutonism on planetary tectonics and long‐term evolution of rocky planets has not been systematically studied. We use numerical simulations to systematically investigate the effect of plutonism combined with eruptive volcanism. At low‐to‐intermediate intrusion efficiencies, results reproduce the three common tectonic/convective regimes as are usually obtained in simulations using a viscoplastic rheology: stagnant‐lid (a one‐plate planet), episodic (where the lithosphere is usually stagnant and sometimes overturns into the mantle), and mobile‐lid (similar to plate tectonics). At high intrusion efficiencies, we observe a new additional regime called “plutonic‐squishy lid.” This regime is characterized by a set of small, strong plates separated by warm and weak regions generated by plutonism. Eclogitic drippings and lithospheric delaminations often occur close to these weak regions, which leads to significant surface velocities toward the focus of delamination, even if subduction is not active. The location of the plate boundaries is strongly time dependent and mainly occurs in regions of magma intrusion, leading to small, ephemeral plates. The plutonic‐squishy‐lid regime is also distinctive from other regimes because it generates a thin lithosphere, which results in high conductive heat fluxes and lower internal mantle temperatures when compared to a stagnant lid. This regime has the potential to be applicable to the Early Archean Earth and present‐day Venus, as it combines elements of both protoplate tectonic and vertical tectonic models.

中文翻译：

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Plutonic-Squishy盖：像地球行星上的侵入岩浆作用产生的新的全球构造政体

岩石行星的热化学演化受其表面构造和岩浆过程控制。在地球上，岩浆作用以岩屑作用/侵入作用与火山作用/挤压作用为主。但是，尚未系统地研究了质子论对行星构造和岩石行星长期演化的作用。我们使用数值模拟系统地研究了冥王主义与火山爆发的结合。在低至中级入侵效率下，结果重现了三种常见的构造/对流形式，通常是在使用粘塑性流变学的模拟中获得的：停滞的盖（单板行星），偶发的（岩石圈通常停滞，有时是岩石圈）翻成地幔）和活动盖（类似于板块构造）。在高入侵效率的情况下，我们观察到了一个新的附加制度，称为“ plutonic-squishy盖”。这种机制的特征是一组小而坚固的板块，这些板块被水热现象产生的温暖和薄弱区域隔开。在这些薄弱区域附近经常会发生弧状滴落和岩石圈分层，即使俯冲作用不活跃，也会导致朝向分层焦点的明显表面速度。板块边界的位置在很大程度上与时间有关，并且主要发生在岩浆侵入的区域，从而导致较小的短暂板块。小孢子状-湿滑-盖层型也有别于其他类型，因为它产生了一个薄的岩石圈，与停滞的盖层相比，它会导致较高的传导热通量和较低的内部地幔温度。