The investigated mantle bodies from the External Ligurians (Groppo di Gorro and Mt. Rocchetta) show evidences of a complex evolution determined by an early high temperature metasomatism, due to percolating melts of asthenospheric origin, and a later metasomatism at relatively high temperature by hydrothermal fluids, with formation of rodingites. At Groppo di Gorro, the serpentinization and chloritization processes obliterated totally the pyroxenite protolith, whereas at Mt. Rocchetta relics of peridotite and pyroxenite protoliths were preserved from serpentinization. The rodingite parageneses consist of diopside ​+ ​vesuvianite ​+ ​garnet ​+ ​calcite ​+ ​chlorite at Groppo di Gorro and garnet ​+ ​diopside ​+ ​serpentine ​± ​vesuvianite ​± ​prehnite ​± ​chlorite ​± ​pumpellyite at Mt. Rocchetta. Fluid inclusion measurements show that rodingitization occurred at relatively high temperatures (264–334 ​°C at 500 ​bar and 300–380 ​°C at 1 ​kbar). Garnet, the first phase of rodingite to form, consists of abundant hydrogarnet component at Groppo di Gorro, whereas it is mainly composed of grossular and andradite at Mt. Rocchetta. The last stage of rodingitization is characterized by the vesuvianite formation. Hydrogarnet nucleation requires high Ca and low silica fluids, whereas the formation of vesuvianite does not need CO₂-poor fluids. The formation of calcite at Groppo di Gorro points to mildly oxidizing conditions compatible with hydrothermal fluids; the presence of andradite associated with serpentine and magnetite at Mt. Rocchetta suggests Fe³⁺-bearing fluids with fO₂ slightly higher than iron-magnetite buffer. We propose that the formation of the studied rodingite could be related to different pulses of hydrothermal fluids mainly occurring in an ocean-continent transitional setting and, locally, in an accretionary prism associated with intra-oceanic subduction.

来自外部利古里亚人（Groppo di Gorro和Mt. Rocchetta）的地幔体研究表明，由于软流圈起源的熔体渗入，早期的高温交代作用决定了复杂的演化过程，后来在较高温度下由热液流体的交代作用决定了这一过程。 ，具有形成的针铁矿。在格罗波迪戈罗（Groppo di Gorro），蛇纹石化和氯化过程完全消除了辉石岩的原石，而在山峰。橄榄石和辉石原石的Rocchetta遗迹被保留以防止蛇纹石化。绿柱石的共生物由Groppo di Gorro的透辉石+ vesuvianite +石榴石+方解石+亚氯酸盐和石榴石+ diopside +蛇纹石±vesuvianite±prehnite±亚氯酸盐芒特普利特山 罗切塔。流体包裹体测量结果表明，在相对较高的温度下（500bar时为264-334°C，在1kbar时为300-380°C）时发生了浸出作用。石榴石是形成的钙镁矾石的第一相，它在Groppo di Gorro含有丰富的水石榴石成分，而在Mt则主要由肉状和辐射状组成。罗切塔。灵藻化的最后阶段以维苏石的形成为特征。水榴石成核需要高钙和低硅酸液，而维苏石的形成不需要一氧化碳 灵芝化的最后阶段的特征是维苏石的形成。水榴石成核需要高钙和低硅酸液，而维苏石的形成不需要一氧化碳 灵芝化的最后阶段的特征是维苏石的形成。水榴石成核需要高钙和低硅酸液，而维苏石的形成不需要一氧化碳_2-流体不畅。在格罗波迪戈罗（Groppo di Gorro）形成的方解石表明与水热流体相容的轻度氧化条件。山中蛇纹石和磁铁矿伴有andradite的存在。的Rocchetta表明的Fe ³⁺荷瘤流体与˚F ö ₂比铁磁铁矿缓冲略高。我们认为，研究的钙镁矾的形成可能与热液的不同脉动有关，这些脉动主要发生在海陆过渡环境中，并且局部发生在与海洋俯冲有关的增生棱镜中。