Island arc magmatism is considered a major mechanism of continental crustal growth; hence, the variation in island arc magma production rates and its influencing factors are of great importance. The along-arc strike variation in the island arc magma production rate is important for elucidating whether the subduction zone temperature is a controlling factor on arc magmatism. No back-arc spreading or ridge subduction is occurring in the intraoceanic subduction region of the Aleutian subduction zone, and the along-arc temperatures vary due to differences in the subducting plate age, convergence rate, and slab dip. Therefore, this is an ideal region to study the correlation between magma production rates and subduction zone temperatures. However, previous studies estimated the magma production rates at only a few locations due to the insufficient coverage of seismic data. Here, we employ the gravity inversion method based on density modelling and seismic data constraints to calculate the present-day arc crustal thickness and then obtain the magmatic thickness by removing the pre-existing crustal thickness from the present-day arc crustal thickness. Finally, the magma production rates along the main intraoceanic subduction region of the Aleutian Arc are mapped by estimating the island arc magmatic thickness and the most recent subduction inception dating result. In addition, the subduction zone temperatures and mantle melt amounts along five profiles across the Aleutian Arc are calculated. The magma production rate variation is highly correlated with the mantle melt amount. The slab temperature controls the extent of the slab dehydration, which is essential for mantle wedge melting, and the mantle wedge temperature controls the size of the hydrated mantle melting region and the melting fraction therein. Therefore, as the subduction zone temperature controls the mantle melt amount, we suggest that the subduction zone temperature is the first-order controlling factor on the magma production rate.

岛弧岩浆作用被认为是大陆地壳生长的主要机制。因此，岛弧岩浆生产速率的变化及其影响因素具有重要意义。岛弧岩浆生产速率的沿弧走向变化对于阐明俯冲带温度是否是弧岩浆作用的控制因素很重要。在阿留申俯冲带的洋内俯冲区域中没有发生弧后扩散或脊俯冲，并且由于俯冲板龄，收敛速度和平板倾角的差异，弧上温度也发生了变化。因此，这是研究岩浆产生速率与俯冲带温度之间相关性的理想区域。然而，先前的研究估计，由于地震数据的覆盖范围不足，仅在少数几个地方的岩浆产生速率。在这里，我们采用基于密度模型和地震数据约束的重力反演方法来计算当前的地壳厚度，然后通过从当前的地壳厚度中删除先前存在的地壳厚度来获得岩浆厚度。最后，通过估算岛弧岩浆厚度和最新的俯冲起始测年结果，绘制了阿留申弧主要洋内俯冲区域的岩浆生产率。此外，还计算了沿阿留申弧线的五个剖面的俯冲带温度和地幔融化量。岩浆产生速率的变化与地幔融化量高度相关。板坯温度控制板坯脱水的程度，这对于地幔楔熔化是必不可少的，而地幔楔块温度控制水合的地幔熔化区域的大小和其中的熔融分数。因此，由于俯冲带温度控制着地幔融化量，我们认为俯冲带温度是影响岩浆产生速率的一阶控制因素。