The post-tectonic and post-orogenic mafic rocks from the Spanish Central System (SCS) (Iberian Massif) include dyke swarms of shoshonitic (microgabbros) and alkaline (lamprophyres and diabases) geochemical affinity, which register the nature of the metasomatic lithospheric mantle under central Spain. Such magmas sometimes show a direct (or indirect) relationship with the formation of orogenic and intrusion-related gold deposits, which are relatively abundant in the Iberian Massif. The noble and base metal composition of these intrusions shows Primitive Mantle-normalized patterns characterized by positive Au and Co anomalies and fractionated platinum group elements (PGE): from lower Ir-group PGE (IPGE; Ir–Ru) to higher Pd-group PGE (PPGE; Rh–Pt–Pd). The low contents of PGE, together with the base metal contents of pyrite (which is the dominant sulphide phase in the alkaline dykes), is in accordance with low degrees of mantle partial melting and the early segregation of sulphides during magma differentiation. The scarcity of PGE mineral deposits in the Iberian Massif could be explained in part by the apparent lack of PGE enrichment in the Iberian lithospheric mantle. On the contrary, the positive Au anomaly of the SCS mafic dykes represents relatively high Au contents, similar to (and higher than) those of mafic rocks derived from metasomatized subcontinental lithospheric mantle underlying Au-endowed cratons. Several geochemical features point to subduction-related metasomatism of either oceanic or continental nature as the main source of Au enrichment. The Au re-fertilization of the lithospheric mantle under central Spain makes it a potential source in the formation of gold mineralizations.

西班牙中央系统（SCS）（伊比利亚地块）的构造后和造山后镁铁质岩石包括钾玄岩（微辉长岩）和碱性（灯斑岩和辉绿岩）地球化学亲和力的岩脉群，它们记录了交代岩石圈地幔的性质。西班牙中部。此类岩浆有时表现出与造山运动和侵入相关金矿床的形成有直接（或间接）关系，这些金矿床在伊比利亚地块相对丰富。这些侵入体的贵金属和贱金属成分显示出原始地幔标准化模式，其特征是正 Au 和 Co 异常以及分馏铂族元素 (PGE)：从较低的 Ir 族 PGE（IPGE；Ir-Ru）到较高的 Pd 族 PGE （PPGE；Rh-Pt-Pd）。PGE含量低，与黄铁矿（碱性岩脉中主要的硫化物相）的贱金属含量一起，与地幔部分熔融程度低和岩浆分异过程中硫化物的早期分离相一致。伊比利亚地块中铂族元素矿床的稀缺部分可以通过伊比利亚岩石圈地幔中明显缺乏铂族元素富集来解释。相反，南海基性岩脉的正Au异常代表相对较高的Au含量，与赋金克拉通交代化的次大陆岩石圈地幔衍生的基性岩相似（且更高）。一些地球化学特征表明，海洋或大陆性质的俯冲相关交代作用是金富集的主要来源。