Transcrustal magma transport systems reflect accumulation of small-volume intrusions over long timescales, transiently altering the thermal, mechanical, and compositional states of the crust. The long-term impact of such repeated and spatially-distributed intrusive magmatism on surface topography remains relatively unexplored. Here, we investigate the development of topography associated with multiple generations of intrusions within the shallow to mid-crust. Expanding a single-intrusion elastic deformation model to regional scales, we determine surface signatures associated with stochastically-emplaced magmatic bodies with different spatial distributions. We find that mean intrusion radius-to-depth ratios control whether intrusions contribute more to regional crustal thickening or local topographic relief. For intrusions emplaced randomly in space following a Poisson distribution, surface topography is well-approximated by flexure of a thin elastic plate of constant effective thickness subject to basal forcing. However, we find that spatial overlap between intrusions at depth significantly limits the amount of information encoded in topography. We end by discussing how topography generated by magmatic intrusions fits into more general landscape evolution that includes climate-driven erosion, and categorize a range of previously-studied intrusive systems according to their topographic expression and predicted long-term landscape impact.

跨地壳岩浆输送系统反映了小体积侵入体在很长一段时间内的积累，瞬时改变了地壳的热、机械和成分状态。这种重复和空间分布的侵入岩浆作用对地表地形的长期影响仍然相对未探索。在这里，我们调查了与浅层到中地壳内多代侵入相关的地形发展。将单一侵入弹性变形模型扩展到区域尺度，我们确定了与具有不同空间分布的随机侵位岩浆体相关的表面特征。我们发现平均入侵半径与深度的比率控制入侵是否对区域地壳增厚或局部地形起伏的贡献更大。对于遵循泊松分布在空间中随机侵入的侵入体，表面形貌可以通过受基础力作用的恒定有效厚度的薄弹性板的弯曲很好地近似。然而，我们发现深度入侵之间的空间重叠显着限制了地形编码的信息量。我们最后讨论了岩浆侵入产生的地形如何适应更一般的景观演变，包括气候驱动的侵蚀，并根据地形表达和预测的长期景观影响对一系列先前研究的侵入系统进行分类。我们发现深度入侵之间的空间重叠显着限制了地形编码的信息量。我们最后讨论了岩浆侵入产生的地形如何适应更一般的景观演变，包括气候驱动的侵蚀，并根据地形表达和预测的长期景观影响对一系列先前研究的侵入系统进行分类。我们发现深度入侵之间的空间重叠显着限制了地形编码的信息量。我们最后讨论了岩浆侵入产生的地形如何适应更普遍的景观演变，包括气候驱动的侵蚀，并根据地形表达和预测的长期景观影响对一系列先前研究的侵入系统进行分类。