Gold enrichment at the crustal or mantle source has been proposed as a key ingredient in the production of giant gold deposits and districts. However, the lithospheric-scale processes controlling gold endowment in a given metallogenic province remain unclear. Here we provide the first direct evidence of native gold in the mantle beneath the Deseado Massif in Patagonia that links an enriched mantle source to the occurrence of a large auriferous province in the overlying crust. A precursor stage of mantle refertilisation by plume-derived melts generated a gold-rich mantle source during the Early Jurassic. The interplay of this enriched mantle domain and subduction-related fluids released during the Middle-Late Jurassic resulted in optimal conditions to produce the ore-forming magmas that generated the gold deposits. Our study highlights that refertilisation of the subcontinental lithospheric mantle is a key factor in forming large metallogenic provinces in the Earth's crust, thus providing an alternative view to current crust-related enrichment models.The lithospheric controls on giant gold deposits remain unclear. Here, the authors show evidence for native gold in the mantle from the Deseado Massif in Patagonia demonstrating that refertilisation of the lithospheric mantle is key in forming metallogenic provinces.

中文翻译：

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羽-俯冲作用相互作用形成了大的含金省。

有人提出在地壳或地幔源富集金是生产巨型金矿床和地区的关键因素。但是，在给定的成矿省，控制岩石gold赋的岩石圈规模过程仍不清楚。在这里，我们提供了巴塔哥尼亚Deseado地块下方地幔中原生金的第一个直接证据，该地幔将丰富的地幔源与上覆地壳中一个大型含铁省的发生联系起来。在侏罗纪早期，羽状熔体对地幔的前体化作用产生了富含金的地幔源。侏罗纪中晚期侏罗纪期间释放的富地幔区域和俯冲相关流体的相互作用，为产生金矿的成矿岩浆提供了最佳条件。我们的研究强调，次大陆岩石圈地幔的金属化是在地壳中形成大型成矿省的关键因素，从而为当前与地壳相关的富集模型提供了另一种观点。巨球金矿床的岩石圈控制尚不清楚。在这里，作者们展示了巴塔哥尼亚Deseado地块中地幔中天然金的证据，表明岩石圈地幔的转体化是形成成矿省的关键。