Yerington District, Nevada: new porphyry system petrogeochronology

摘要

The Yerington District, Nevada, provides a first-order control on porphyry copper deposit (PCD) models (Seedorff 2005; Sillitoe 2010; Dilles 1987) and the mag-matic-hydrothermal transition (Carter et al. 2019) as, due to tectonic tilting, it exposes a ca. 8 km deep section from volcanic to plutonic environments through no less than 4 PCDs. The general sequence of pluton emplacement, from McLeod to Bear to Luhr Hill granite, that culminated in PCD formation, has long been established (Dilles and Wright 1988) and provides the basis for more recent numerical models for batho-lith construction and mineralisation (Schopa et al. 2017). Based on macro- to micro-scale field-based and textural observations, and new high precision CA-ID-TIMS zircon U-Pb age determinations, we have revised this petrogeochronological framework.