Why doesn't Mars have plate tectonics?

Mars likely had a thicker lithosphere from early in its history, which prevented its crust from breaking into the mobile plates that developed on Earth. Some researchers believe Mars may have had early plate motion that stalled as the planet cooled faster than Earth.

What is transcrustal magmatism?

Transcrustal magmatism is the process by which large magma bodies pool at different depths inside a planet's crust, evolve chemically through fractional crystallization, and leave behind a layered structure detectable by seismic waves. It was previously considered a signature unique to plate tectonic settings.

Could Mars have supported life?

This discovery has indirect implications: a Mars with long-lived, active deep magmatic systems likely also had prolonged volcanic outgassing that could have maintained a thicker atmosphere, liquid water, and hydrothermal systems on its surface — all potential habitats for microbial life. The study does not find evidence of life, but it increases the geological plausibility of an early habitable Mars.

Is InSight still operating on Mars?

InSight's mission ended in December 2022 when dust accumulation on its solar panels reduced power to unsustainable levels. The seismic data it collected during its four-year mission continues to be analyzed by researchers around the world.

火星在没有板块构造的情况下维持了数十亿年类似地球的山火岩浆系统

火星地面下24公里深处，来自古老火星地震的地震波揭示了一个本不应该存在的局面：一个化学界面，展示了巨大的燕蝎岩山书曾分层的地点——与地球活山内部的情况完全一致。火星没有板块构造，没有活火山。然而，Nature Astronomy上发表的新研究却在火星深处发现了这一过程——跨地壳岛浆活动——的精确化学指纹。

火星地震如何描绘隐藏的层结构

NASA的InSight于2018年降落在小路坦平原，携带有山年旋转最精密的地震仪。近四年间记录了超过1300次火星地震。布里斯托大学Tobermory Mackay-Champion博士和牛津山大学的同事将热力学模型应用于地震数据，结果在地下24公里处发现了超镇麁岐岩与较轻镑麁岩之间的明确界面。

火星在没有板块构造的情况下实现了什么

“我们一直假设火星的火山活动比较简单”，牛津山大学Jon Wade教授说。“但这个发现表明，火星能够维持大型、长期存在的系统，其中熟岩在整个地壳中演变并重新应用。”

常见问题

火星为什么没有板块构造？

火星可能很早就形成了较厚的岩石圈，阻止了地壳分裂成可移动板块。

跨地壳岛浆活动是什么？

大型岁浆体在行星地壳不同深度积聚，化学演变，并留下地震波可探测的层状结构。

火星能孕育生命吗？

深层岁浆系统意味着更加浓密的大气、液态水和热水系统，这些都是微生物的潜在栀息地。

InSight还在运行吗？

2022年12月火星尘尘覆盖太阳能板后任务结束。

下一步

“如果火星能够维持这种地质复杂性，那么宜居性所需的条件也许可以在比我们想象的更多行星上出现”，Wade教授说。

参考文献：Mackay-Champion, T.R. et al., “Seismic evidence for a melt-depleted lower crust and transcrustal magmatism on Mars”, Nature Astronomy, 2026. DOI: 10.1038/s41550-026-02907-5

标签: science-en1, InSight, 板块构造, 火星, 火星地震, 自然天文学