New Geochronology for a Late Jurassic Porphyry System at Bonita Spring, South Jackson Mountains, Humboldt County, Nevada

EXTENDED ABSTRACT
The south Jackson Mountains form the backbone of a Mesozoic volcano-plutonic
continental margin arc complex which separates the Black Rock and Desert Valley
Tertiary extensional basins in northwestern Nevada (Figure 1). The Bonita property
is located in the south Jacksons in Humboldt County, and was staked in 2014 in order
to evaluate a cluster of historic iron, copper and gold workings spread over an area
of approximately 5 × 7 sq km and most commonly associated with iron oxide breccia.
The purpose of this paper is to provide new geochronological and whole-rock geochemical data for a newly recognized, earliest Late Jurassic polyphase plutonic complex and associated alkaline porphyry copper-gold hydrothermal system at Bonita.
Key Words: South Jackson range, Bonita, Happy Creek Volcanics, Late Jurassic, Geochronolgy, Copper-Gold Porphyry