---
title: "Tertiary Minerals Reports Highest-Grade Silver-Copper Intersection at Mushim"
publisher: "Share Talk"
author: "sharetalk"
published: "2026-09-17T07:00:45+00:00"
modified: "2026-09-17T07:00:45+00:00"
date: 2026-09-17
canonical: "https://www.share-talk.com/tertiary-minerals-reports-highest-grade-silver-copper-intersection-at-mushim/"
category: "Mining"
categories: ["Mining"]
tags: ["COPPER", "Exploration", "Gold Project", "Jacks", "mineral", "Mushima North Project", "Nevada", "Project", "Richard Belcher", "Share Talk", "Tertiary Minerals", "TYM", "USA", "Zambia"]
image: "https://i0.wp.com/www.share-talk.com/wp-content/uploads/2026/09/4a2f8d7d-3827-4396-b74f-2c42fdc5bab6.png?fit=1727%2C911&quality=80&ssl=1"
format: "news"
language: "en-GB"
---

# Tertiary Minerals Reports Highest-Grade Silver-Copper Intersection at Mushim

**Published:** September 17, 2026
**Author:** sharetalk
**Categories:** Mining
**Tags:** COPPER, Exploration, Gold Project, Jacks, mineral, Mushima North Project, Nevada, Project, Richard Belcher, Share Talk, Tertiary Minerals, TYM, USA, Zambia
**Featured image:** ![](https://i0.wp.com/www.share-talk.com/wp-content/uploads/2026/09/4a2f8d7d-3827-4396-b74f-2c42fdc5bab6.png?fit=1727%2C911&quality=80&ssl=1)

---

[Tertiary Minerals plc (AIM: TYM)](https://www.investegate.co.uk/announcement/rns/tertiary-minerals--tym/mushima-north-highest-grade-ag-cu-intersection/9776254) has reported its **highest-grade silver-copper intersection to date** from the Discovery Zone at the **Mushima North Project in Zambia**, with new drilling also extending mineralisation beyond the current Exploration Target boundary.

Hole **26TMNRC-066 returned 82m at 107g/t silver equivalent from just 8m depth**, including **37m at 191g/t silver equivalent from 53m**. The hole ended in mineralisation, indicating the system remains open at depth.

Further drilling returned **5m at 1.01% copper, 164g/t silver and 0.15% zinc**, equivalent to 227g/t silver, while the programme also delivered a new project-high certified silver assay of **659g/t**.

Tertiary said the results strengthen the case for expanding the known mineralised footprint and support its ongoing work towards a **JORC-compliant Mineral Resource Estimate**. Results from 29 holes have now been released from the Phase 4 programme.

The current Exploration Target stands at **15-30 million tonnes grading 40-60g/t silver equivalent**, with mineralisation remaining open to the northwest, southwest and at depth.

Investors should note that the reported widths are **downhole intersections and true widths remain unknown**, while the silver-equivalent figures assume 100% recovery and are illustrative only. Further certified laboratory results are expected in the coming weeks.

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