Volcanoes buried in Te Riu-a-Māui/Zealandia sedimentary basins

Many volcanoes are buried within Te Riu-a-Māui/Zealandia sedimentary basins. Based on a large collection of seismic reflection and drillhole data, this paper outlines the morphology, location and age of over 400 volcanoes buried and preserved in offshore New Zealand basins. We discuss the relationships of these volcanoes to the timing and locations of the main tectonic events that shaped Zealandia in the last 105 Myr. Late Cretaceous volcanism mainly formed large (>20 km3) composite cones and volcanic complexes that erupted along rift faults related to the break-up of Zealandia from south-eastern Gondwana. Cenozoic intraplate volcanic activity was widespread, typically forming clusters of scattered small-volume (3) craters and cones. In contrast, large Cenozoic volcanic complexes, composite cones and shield volcanoes erupted along linear arcs associated with subduction along the Pacific-Australian plate boundary. In detail, the presence of pre-existing structures and types of host rocks also influence the passage of magma in the shallow (

诸多火山埋藏于特留阿毛伊/西兰大陆（Zealandia）沉积盆地之中。本文基于海量地震反射与钻孔数据，梳理了新西兰近海盆地中400余处被埋藏并保存下来的火山的形态、位置与年代信息。我们探讨了这些火山与过去1.05亿年间塑造西兰大陆的主要构造事件的发生时间与空间分布之间的关联。晚白垩世火山作用主要形成了体积大于20立方千米的大型复合火山锥与火山岩系，这些火山沿与西兰大陆从东南冈瓦纳（Gondwana）裂解相关的裂谷断层喷发。新生代板内火山活动分布广泛，通常形成分散的小型体积（3）火山口与锥状体集群。与之相反，大型新生代火山岩系、复合火山锥与盾状火山沿与太平洋-澳大利亚板块边界（Pacific-Australian plate boundary）俯冲作用相关的线性弧带喷发。具体而言，先期存在的构造与赋存岩石类型也会影响浅层岩浆的运移（