Joma

Overview

Massive, brecciated, disseminated, minor veins, 0.04 km thick. Double arc, dish-shaped body dips steeply SW and W, leveling off to nearly horizontal at 200 m depth, 1,200-1,500 m lateral extension, 55 m wide (plan). Contains 32-35% S. Stratigraphy may be inverted. Back arc marginal basin or off-axes ensialic intraplate incipient rift or ensimatic mid-oceanic ridge (mid-ocean ridge tholeiitic affinity).

Geological Context

Tectonic Setting: Bimodal-mafic in oceanic arc

Resources & Operations

Operator: 0

Production Start: 1972

Data Provenance

Source: USGS MRDS