Here, we report on the Quaternary Volsci Volcanic Field (VVF, central Italy). In light of new ⁴⁰Ar/³⁹Ar geochronological data and compositional characterization of juvenile eruptive products, we refine the history of VVF activity, and outline the implications on the pre-eruptive magma system and the continental subduction processes involved. Different from the nearby volcanic districts of the Roman and Campanian Provinces, the VVF was characterized by small-volume (0.01–0.1 km³) eruptions from a network of monogenetic centers (mostly tuff rings and scoria cones, with subordinate lava occurrences), clustered along high-angle faults of lithospheric depth. Leucite-bearing, high-K (HKS) magmas (for which we report for the first time the phlogopite phenocryst compositions) mostly fed the early phase of activity (∼761–539 ka), then primitive, plagioclase-bearing (KS) magmas appeared during the climactic phase (∼424–349 ka), partially overlapping with HKS ones, and then prevailed during the late phase of activity (∼300–231 ka). The fast ascent of primitive magma batches is typical of a tectonically controlled volcanic field, where the very low magma flux is a passive byproduct of regional tectonic strain. We suggest that the dominant compressive stress field acting at depth was accompanied by an extensional regime in the upper crust, associated with the gravity spreading of the Apennine chain, allowing the fast ascent of magma from the mantle source with limited stationing in shallow reservoirs.

在这里，我们报道第四纪Volsci火山场（VVF，意大利中部）。根据新的⁴⁰ Ar / ³⁹ Ar年代学数据和少年喷发产物的成分特征，我们完善了VVF活动的历史，并概述了对喷发前的岩浆系统和所涉及的大陆俯冲过程的影响。VVF与附近的罗马和Campanian省的火山区不同，其特点是体积小（0.01–0.1 km ³）沿岩石圈深度的高角度断层聚集，来自单相中心网络（主要是凝灰岩环和火山灰锥，伴有从属熔岩出现）的喷发。含白云母，高K（HKS）岩浆（我们首次报道了金云母斑晶组合物）主要是在活动的早期阶段（约761-539 ka），然后是原始的含斜长岩（KS）的岩浆。出现在高潮期（〜424–349 ka），与HKS部分重叠，然后在活动后期（〜300–231 ka）盛行。原始岩浆批次的快速上升是构造控制火山场的典型特征，其中极低的岩浆通量是区域构造应变的被动副产品。