Latest Limestone News

Fulcrum Lithium has staked 41 additional claims around its Alkali Flats project in Nevada and reported up to 79% lithium extraction from acid-free roast and water-leach tests. The results improve on earlier water-leach work, although they remain below the company’s 93% to 96% sulfuric-acid benchmark and come from scoping-level tests.

Estrella Resources has delivered a 27,371-tonne manganese stockpile and a maiden 621-million-tonne limestone resource in Timor-Leste, but the operational progress came alongside a $23.98 million FY2026 loss and a $21.13 million impairment of Western Australian assets. The next test is whether the manganese stockpile can become cash and whether Werumata can move beyond an Inferred resource.

Cassius Mining reported a deeper FY2026 loss, negative net assets and a material uncertainty over its ability to continue as a going concern. The company is relying on further funding, a possible Ghana arbitration award and progress at its Soalara limestone project to support its next phase.

GreenX Metals has put a conceptual copper-silver target at Tannenberg and a major Poland arbitration award at the centre of its next phase. The annual report also shows the cost of that strategy: a $12.34 million loss, a $4.42 million project impairment and continued reliance on equity funding.

Estrella Resources has identified copper-bearing porphyritic diorite and gold at nine locations around Timor-Leste’s Laleno Dome, strengthening the case for a broader intrusion-related system. The geological signal is encouraging, but drilling approval and representative follow-up work remain outstanding.

BOA Resources has returned high-grade copper intersections from all six initial RC holes at Ricci Lee, including 14 metres at 2.49% copper and 15 metres at 2.25%. Assays from 40 further RC holes and 92 aircore holes across five other prospects remain pending.

Viking Mines has identified several wide zones of visually confirmed scheelite in ongoing RC drilling at its Linka tungsten project in Nevada, including 22 metres across a 24-metre horizon. The encouraging visual results remain unassayed, leaving laboratory results as the next critical test of grade and continuity.

Estrella Resources has expanded its Timor-Leste exploration footprint by 100km2 while securing conditional approval to export a 100-tonne manganese sample to an Indonesian customer. The company is also preparing 3,000 metres of drilling and a possible upgrade to part of its 621Mt Werumata limestone resource.

Viking Mines has hit 14 metres at 0.56% WO3 in the first assay from maiden drilling at its Linka tungsten project in Nevada. The result confirms mineralisation below historic workings, although a duplicate sample returned a lower grade and no resource has yet been defined.

Evion has identified a previously unmined 200m by 200m prospect at its Carp Fluorspar Project in Nevada, just 300m from the historic South Pit. Assays are pending, with geophysical surveys and a potential maiden drilling programme next in line.

OD6 Metals has significantly increased the Mammoth fluorspar target footprint at its Quinn Project in Nevada, revealing broad, high-grade mineralisation with assays up to 85.9% CaF2 and preparing for drilling to define the system's scale.

Greenvale Energy has updated assay data for its 9km uranium paleochannel target at the Thunderball Project in the Northern Territory, confirming anomalous uranium readings and progressing permitting for maiden drilling.