The mechanisms of magma ascent, transport and emplacement of the volcanic pile from LIPs are key issues regarding the understanding of the complex construction of volcanic systems and magma transport through the crust. The integrated approach of morphology of the volcanic and subvolcanic bodies, whole rock geochemistry and ASM data provides a robust tool to unravel the flow dynamics of the volcanic bodies and the sequence of the magmatic events. Such approach allows building up a model of construction of the lava pile considering the role played by the plumbing system. This paper investigates the emplacement mechanism of sill and lava flows of the Serra Geral Group (SGG), in the southern part of Mesozoic Paraná-Etendeka Magmatic Province (PEMP) in Brazil. Geologic and geochemical analysis were integrated with anisotropy of magnetic susceptibility (AMS), anisotropy of anhysteretic remanent magnetization (AARM) and rock magnetism experiments on 14 sampling sites in the Morro da Igreja region, top of the lava pile in Santa Catarina. The area is composed of low-Ti basaltic (with predominance of rubbly pahoehoe) and silicic lava flows, both intruded by a tabular sill that reaches a few hundred meters wide. The mafic lava flows are composed of Gramado, Urubici and Esmeralda magma-type basalts and andesite basalts. The silicic lava flows are massive or foliated, classified as Palmas type dacites. The sill has regular columnar joints and is classified as Esmeralda type. Magnetic mineralogy data suggests magnetite or Ti-poor magnetite as the main magnetic mineral for all the igneous rocks, and AARM results show anomalous fabric for the lava flows and normal or intermediate fabric for the sill. Besides the anomalous fabric sites, AMS data provide reliable directional data to infer flow direction for the sill, with initial propagation towards NE, followed by a preferential SE direction of magma flow. For the silicic rocks, the presence of vertical and inclined magnetic foliation suggest a lava dome geometry. The dynamics of the magmatic flow of the sill and lava flows associated with the compositional characteristics of the rocks allows stablishing the stratigraphy of the magmatic events in the area as well as the proposition of an emplacement model for the sequence.

LIPs 的火山岩浆上升、运输和就位机制是了解火山系统复杂构造和岩浆在地壳中运输的关键问题。火山和次火山体形态学、全岩地球化学和 ASM 数据的综合方法为揭示火山体的流动动力学和岩浆事件的序列提供了一个强有力的工具。考虑到管道系统所起的作用，这种方法允许建立熔岩桩的构造模型。本文研究了巴西中生代巴拉那-埃滕德卡岩浆省 (PEMP) 南部 Serra Geral 群 (SGG) 的岩床和熔岩流的侵位机制。地质和地球化学分析与磁化率各向异性 (AMS)、滞后剩磁 (AARM) 各向异性以及圣卡塔琳娜州熔岩堆顶部 Morro da Igreja 地区 14 个采样点的岩石磁性实验相结合。该地区由低钛玄武岩（主要是碎石状 pahoehoe）和硅质熔岩流组成，两者均被宽达数百米的板状岩床侵入。基性熔岩流由 Gramado、Urubici 和 Esmeralda 岩浆型玄武岩和安山玄武岩组成。硅质熔岩流呈块状或叶状，属于帕尔马斯型英安岩。门槛有规则的柱状节理，属于埃斯梅拉达类型。磁性矿物学数据表明磁铁矿或贫钛磁铁矿是所有火成岩的主要磁性矿物，和 AARM 结果显示熔岩流的异常结构和窗台的正常或中间结构。除了异常结构点外，AMS 数据还提供可靠的方向数据来推断基床的流动方向，最初向 NE 方向传播，然后是岩浆流的优先 SE 方向。对于硅质岩石，垂直和倾斜的磁性叶理的存在表明熔岩穹顶的几何形状。与岩石成分特征相关的岩浆流和熔岩流的动力学可以确定该地区岩浆事件的地层学以及该层序的侵位模型。AMS 数据提供可靠的方向数据来推断基床的流动方向，最初向 NE 传播，然后是岩浆流的优先 SE 方向。对于硅质岩石，垂直和倾斜的磁性叶理的存在表明熔岩穹顶的几何形状。与岩石成分特征相关的岩浆流和熔岩流的动力学可以确定该地区岩浆事件的地层学以及该层序的侵位模型。AMS 数据提供可靠的方向数据来推断基床的流动方向，最初向 NE 传播，然后是岩浆流的优先 SE 方向。对于硅质岩石，垂直和倾斜的磁性叶理的存在表明熔岩穹顶的几何形状。与岩石成分特征相关的岩浆流和熔岩流的动力学可以确定该地区岩浆事件的地层学以及该层序的侵位模型。