The Ivrea Zone of NW Italy records the polyphased evolution of a magmatic sulfide mineral system, which occurred at multiple stages over a >80 Ma time interval. Between 290 and 250 Ma, a series of hydrated and carbonated ultramafic alkaline pipes containing Ni-Cu-PGE-(Te-Au) mineralisation was emplaced in the lower continental crust. At 200 Ma, a subsequent mineralising event occurred in association with the emplacement of the La Balma-Monte Capio (LBMC) intrusion. Modelling of the LBMC parental magma shows derivation from up to 60% partial melting of an anhydrous depleted juvenile mantle outside of garnet stability. The inferred composition of the parental melt is consistent with magmatism associated with the Central Atlantic Magmatic Province (CAMP). However, its tellurium-enriched composition together with the S-C-O isotope signature of the associated magmatic sulfide mineralisation (δ³⁴S = +0.53 to +1.00‰; δ¹³C = −10.41 to −4.07‰; δ¹⁸O = +6.57 to +13.74‰) cannot be reconciled with the CAMP source. It is argued that the geochemical and isotopic signature of the LBMC intrusion reflects interaction and mixing of a primitive magma sourced from a juvenile source with localised domains enriched in carbonate and metal-rich sulfides located in the lower crust, consistent with the composition of the Permo-Triassic pipes. We propose that this interaction resulted in sulfide-supersaturation and enrichment in volatiles and metals of the LBMC magma. Upwards magma transport may have been facilitated by devolatisation of magmatic carbonate from the pipes and the generation of a CO₂ supercritical fluid that acted as buoyancy aid for the dense sulfide liquid. Evidence of this magmatic interaction informs on the first-order processes that control enhanced metallogenic fertility along the margins of lithospheric blocks. The scenario depicted here is consistent with reactivation and enrichment of a Gondwana margin Ni-Cu-PGE-(Te-Au) mineral system during the breakup of Pangea.

意大利西北部的伊夫雷亚地区记录了岩浆状硫化物矿物系统的多相演化，该演化是在> 80 Ma的时间间隔内分多个阶段发生的。在290至250 Ma之间，在下部大陆壳中安放了一系列含有Ni-Cu-PGE-（Te-Au）矿化作用的水合碳酸盐化的超镁铁碱性管。在200 Ma处，随后发生的矿化事件与La Balma-Monte Capio（LBMC）侵入的入侵有关。LBMC父母岩浆的模型表明，石榴石稳定性之外，无水贫化的少年地幔有高达60％的部分融化作用。推测的母体熔体组成与中大西洋岩浆省（CAMP）相关的岩浆作用一致。然而，³⁴ S = +0.53至+ 1.00‰; δ ¹³ C = -10.41 -4.07到‰; δ ¹⁸ O = 6.57到13.74 +‰）不能与CAMP源进行协调。有人认为，LBMC侵入岩的地球化学和同位素特征反映了来自少年来源的原始岩浆与位于下部地壳中富含碳酸盐和富含金属的硫化物的局部区域的相互作用和混合，这与Permo的成分一致-三叠纪管道。我们认为这种相互作用导致了LBMC岩浆的硫化物过饱和和富集。岩浆碳酸盐从管道中脱挥发分和CO ₂的产生可能促进了岩浆的向上传输。用作稠密硫化物液体的浮力助剂的超临界流体。这种岩浆相互作用的证据表明，一阶过程控制着岩石圈块边缘增强的成矿能力。这里描述的情景与在Pangea破裂期间冈瓦纳边缘的Ni-Cu-PGE-（Te-Au）矿物系统的重新活化和富集相一致。