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Zenith Minerals defines lithium brine drill targets at Mexican project

The company has used ground-based magnetotelluric geophysical surveys to identify conductive zones.
Mexican flag in front of domed building
The Zacatecas project is in San Luis Potosi State of central Mexico

Zenith Minerals Ltd (ASX:ZNC) has identified two strong conductive zones using ground-based magnetotelluric (MT) geophysical surveys at its Zacatecas lithium brine project in Mexico.

The company this month will begin the permitting process for drill testing.

The Zacatecas project is part of the American lithium joint venture with Bradda Head Ltd, where Bradda is confirming an initial 55% interest by spending US$5 million on exploration.

Robust drill targets at depth

Surveying indicated a conductive layer beneath the Illescas salt lake, between 200-400 metres thick and 2.5 kilometres in length.

The second target was defined at the San Vicente-San Juan salt lake concession, with the target zone between 100-200 metres in thickness at a depth of 50-300 metres below surface.

Survey results show strong conductive zones considered by the JV to be robust drill targets.

The results are interpreted to support the presence of significant thicknesses of basin-fill sediments.

Lithium brines to 2.1% lithium have been reported from small-scale salt production solar evaporation ponds on an adjacent salt lake 10 kilometres west of Zacatecas.

READ: Zenith Minerals drills out widespread near-surface lithium in Arizona

MT geophysical surveys have been successfully used by other lithium brine explorers in Nevada and South America to detect lithium bearing saline brines, which are expressed as conductive layers within deep sediment sequences in salt lakes.

The Zacatecas brine targets are considered by Zenith to be most similar to those hosted in the immature salt lake systems such as Clayton Valley, host to the USA’s only lithium brine operation.

Systematic surface geochemical sampling by Zenith on salt pans covering the Zacatecas tenure returned highly anomalous lithium in surface sediments up to 1046ppm.

This is comparable to and higher than those from competitor lithium brine projects in Mexico and the USA.

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