Ana Cabral Gardner

REGULATION

Former Sigma co-CEO fired for trading shares during blackout

The miner didn’t specify the reason for Calvyn Gardner’s departure in January

24 November 2023

ENERGY MINERALS

Sigma announces resignation of COO

Shares down over 8%

09 October 2023

ENERGY MINERALS

Sigma gets green lithium premium

Premium pricing with first shipment

26 May 2023

ENERGY MINERALS

Sigma begins lithium production

Newest lithium producer

17 April 2023

ENERGY MINERALS

EPA proposes tougher emissions standards

Standards mean more metal demand sooner

13 April 2023

BASE METALS

Sigma grows Brazilian resource

Sigma increases mineral resource at Brazilian Grota do Cirilo lithium project by about 46%

24 June 2022

BASE METALS

Sigma soars as it releases Grota do Cirilo studies

Sigma's Brazilian Grota do Cirilo's NPV (8%) is $5.1b and IRR is 589% as stock soars to record high

30 May 2022

FROM THE CAPITAL

Sigma lithium puts ESG ahead of money

Focus on the E may have come at the expense of the G

17 June 2021

RESOURCE STOCKS

Hot Ground, High Hopes: Gorilla Gold's Exploration Heats Up

Resource updates, metallurgical tests, and momentum building

PARTNER CONTENT

TPDC & Energetech-Tantel Sign MOU to Boost Tanzania's Energy Hub and Gas Economy Goals

The partnership aims to position Tanzania as a leading regional energy and gas development

RESOURCE STOCKS

Mt Malcolm Mines Strikes Gold at Golden Crown

High-grade intercepts, structural clarity, and the path toward a maiden resource

RESOURCE STOCKS

Golden Signals: Gorilla Mines Targets Growth at Mulwarrie

From first hits to future plans, what Gorilla Gold sees beneath Mulwarrie

A growing series of reports, each focused on a key discussion point for the mining sector, brought to you by the Mining Journal Intelligence team.

A growing series of reports, each focused on a key discussion point for the mining sector, brought to you by the Mining Journal Intelligence team.

editions

Mining Journal Intelligence’s Project Pipeline Index 2025

View our 50 top mining projects, handpicked using a unique, objective selection process from an expanded database of 600+ global assets.

editions

Mining Journal Intelligence: Investor Sentiment Report 2025

Exclusive insights into the plans, priorities and preferences of 130+ mining investors and top factors influencing investment decisions in 2025.

editions

Mining Journal Intelligence World Risk Report 2024 (feat. MineHutte ratings)

A detailed analysis of mining investment risks across 117 jurisdictions globally, assessed across six risk categories and an industrywide survey.

editions

ESG Mining Company Index: Benchmarking the Future of Sustainable Mining

The ESG Mining Company Index report provides an in-depth evaluation of ESG performance of 61 of the world's largest mining companies. Using a robust framework, it assesses each company across 9 meticulously weighted indicators within 6 essential pillars.