Highlights:
– Purple Mountain Mining has recognized uncovered garnet skarn within the Mammoth and Greenstone fields, two of the three areas that make up the corporate’s wholly owned Pioneer Tungsten Mission in Montana, USA.
– The Pioneer Tungsten Mission is comprised of three declare areas, Greenstone, Mammoth and Misplaced Creek, situated alongside the japanese fringe of Torrey Batrice Mountain and regionally characterised by large garnet skarns containing limestone as much as 25 meters thick. These native skarns are identified to include tungsten (W) mineralization as scheelite (CaWO4).
– Purple Mountain submitted 24 rock chip samples collected from mammoth and greenstone for multi-element evaluation to substantiate the presence of tungsten mineralization in surface-exposed garnet skarns inside the firm’s claims.
– Evaluation outcomes of the primary sampling can be accessible by the top of June
– Magnetic modeling research reveal subsurface magnetic materials beneath the Greenstone and Mammoth claims, interpreted to symbolize a shallow extension of the granodiorite supply of skarn mineralization, and point out that the Purple Mountain declare has clear geological potential for limestone-based tungsten-bearing garnet skarn mineralization at shallow depths under uncovered quartzite.
– Purple Mountain’s Pioneer Tungsten Mission possession encompasses comparable geology and is adjoining to the possession bought by Almonti Industries (market capitalization: AUD 6.6 billion) in November 2025 and hosts the Gentung tungsten deposit, with mineral assets of 6.83 million tonnes @ 0.315% WO3. So are the Ivanhoe and Misplaced Creek mines, that are estimated to have produced a mixed 680,000 tons of tungsten ore within the Fifties and Nineteen Seventies.
– Additional reconnaissance mapping and floor sampling is deliberate for June, and the Firm expects that constructive assay outcomes will allow it to maneuver rapidly to check drilling of down-dip extensions of the skarn mineralization in a number of concessions.
The Pioneer Tungsten Mission consists of three teams of claims: the Greenstone, Mammoth, and Misplaced Creek concessions alongside the japanese margin of Torrey Batrice Mountain (Determine 1*), all of which report tungsten-bearing garnet skarn mineralization. Big garnet skarns as much as 25 meters thick are identified to happen within the adjoining floor. These skarns include tungsten (W) mineralization as scheelite (CaWO4), with regionally detected concentrations of 0.5% or extra WO3.
Along with the publicity of garnet skarn on the floor, the Purple Mountain declare additionally has clear geological potential for limestone-based tungsten-bearing garnet skarn mineralization at shallow depth under the overlying quartzite unit, and magnetic modeling performed by Arrow Geosciences signifies subsurface magnetic materials, interpreted to symbolize granodiorite, the supply of the skarn mineralization.
Reconnaissance mapping confirms garnet skarn in mammoth and greenstone
In late Could, as a part of Purple Mountain’s due diligence course of, our U.S. discipline crews accomplished a three-day discipline reconnaissance to the Mammoth and Greenstone undertaking areas. Throughout the go to, the crew was in a position to visually verify the presence of uncovered garnet skarn in each mammoth and greenstone (Determine 2*) and picked up 24 rock chip samples of skarn and different altered materials (Determine 3, Determine 4, Appendix 1)*. These have been submitted for multi-element evaluation and outcomes are anticipated by the top of June. The first function of this reconnaissance sampling is to measure the tungsten content material of skarn samples to supply an preliminary indication of the potential of Purple Mountain’s declare to host economically vital garnet skarn-hosted tungsten mineralization, in addition to the estimated 680,000 tons of tungsten ore mined at Ivanhoe and Misplaced Creek within the Fifties and Nineteen Seventies. Mineralization comprising Almonty’s Gentung tungsten deposit. The mineral useful resource of this layer is estimated at 6.83 million tonnes at 0.315% WO3.
Magnetic modeling exhibits shallow granodiorite beneath mammoth and greenstone
Airborne magnetic and radiometric magnetic information from the 2023 USGS Butte Extension within the Boulder-Butte area of Montana clearly exhibits a robust magnetic response from the Uphill Creek granodiorite, whereas the Grayling Lake granite and Torrey-Butrice Mountain subsedimentary host rocks are nonmagnetic (Determine 5*).
Sturdy magnetic distinction permits the margin of the Uphill Creek granodiorite, the fluid supply of the tungsten-bearing garnet skarn mineralization on this space, to be mapped subsurface utilizing magnetic information. As seen in Determine 5A, Gentung’s tungsten mineral useful resource of 683 tons, situated roughly 200 m deep at an almost flat interface between limestone and granodiorite within the Snowcrest Mountain Vary, is expressed as a magnetic excessive, successfully mapping the comparatively shallow subsurface extent of the granodiorite. Related magnetic options lengthen effectively past the floor margin of the granodiorite underlying the Purple Mountain Mammoth (Determine 5A*) and Greenstone (Determine 5B*) claims, suggesting the same subsurface extent that will type skarn mineralization. In distinction, the Misplaced Creek granodiorite margin (Fig. 5C*) typically seems to dip very steeply from the floor.
To raised perceive the geometry of the Uphill Creek granodiorite, Purple Mountain collaborated with Arrow Geosciences to create a 3D mannequin of magnetic susceptibility from USGS magnetic datasets throughout the corporate’s three declare areas. To appropriate for granodiorite’s magnetism, Arrow used digital composite magnetization depth (VRMI) to finish its inversion. Information are inverted utilizing 25m cells with topographic management offered by the globally accessible Shuttle Radar Topography Mission (SRTM) dataset, with a spatial decision of roughly 30m.
The magnetic modeling outcomes are summarized in Determine 6. This end result confirms Purple Mountain’s preliminary interpretation of USGS magnetic information and signifies a ridge of magnetic materials that’s interpreted to be a subsurface extension of the Uphill Creek granodiorite related to the Gentung tungsten useful resource. Useful resource definition drilling confirmed its existence at a depth of roughly 200 m. Related subsurface magnetic options are situated at drillable depths under the Mammoth and Greenstone declare areas of Purple Mountain, the latter space exhibiting a spatial relationship between excessive magnetic fields on the floor and mapped garnet skarns. In distinction, the modeled magnetic fringe of the granodiorite at Misplaced Creek may be very steeply dipping. Mammoth’s magnetic mannequin additionally exhibits a central “gap” that’s interpreted as an intrusion of later non-magnetic Grayling Lake granite into Uphill Creek granodiorite.
Additional floor sampling deliberate earlier than focused drilling
Purple Mountain plans to conduct further floor geological mapping and sampling throughout all three Pioneer Tungsten Mission declare areas throughout June, and as famous above, multi-element evaluation outcomes for the 24 samples already collected are anticipated by the top of this month.
If the tungsten floor evaluation yields constructive outcomes, the Firm anticipates that it is going to be able to quickly set drilling targets to check the subsurface extent of outcrop skarn mineralization at a number of targets throughout this Northern Hemisphere summer time and intends to behave as expeditiously as attainable to safe the required environmental and regulatory approvals with the objective of executing the deliberate drilling program as rapidly as attainable.
Pioneer Mission Geology
The Pioneer Tungsten Mission’s claims cowl three separate areas: Greenstone, Mammoth, and Misplaced Creek Overlook, the place the japanese margin of the Uphill Creek granodiorite has direct floor contact with the Snowcrest Vary Vary (Determine 1). The Purple Mountain declare consists of tungsten-bearing skarn mineralization that was mapped and sampled in the midst of the final century, in addition to quite a few historic options which can be nonetheless seen immediately. This declare additionally sits proper subsequent to the declare bought by Almonti Industries (NASDAQ:ALM) (TSE:AII) (ASX:AII) (FRA:ALI1) in November 2025. So are the Ivanhoe and Misplaced Creek mines, that are estimated to have produced a complete of 680,000 tons of tungsten ore within the Fifties and from 1970 to 1975.
Torrey Batrice is a big advanced that types the core of the Pioneer Mountains in southwestern Montana. The composition of deep rocks ranges from gabbro to granite, however is primarily granodiorite in composition. Tungsten mineralization happens alongside the whole japanese contact of the Pioneer Batholith the place it contacts mid-Paleozoic carbonate-rich sedimentary rocks (Fig. 1), however to this point vital mineralization, occurring in scheelite-bearing large garnet skarns, has solely been discovered the place Snowcrest Vary limestone contacts Uphill Creek granodiorite. Importantly, there isn’t a skarn improvement or tungsten mineralization related to the Lake Grayling Granite. As a result of this granite is truncated, it’s youthful than the Mammoth Prospect granodiorite and related skarn mineralization.
Historical past of tungsten manufacturing
The earliest report of tungsten mineralization hosted in garnet skarns round Mount Torrey Batrice dates to the early Fifties, pushed by the U.S. federal authorities’s Strategic Metals Reserve Program, with vital manufacturing recorded on the Ivanhoe and Misplaced Creek mines (Determine 1). Exploration for tungsten befell across the Ivanhoe mine (also called Brown’s Lake mine) from 1951 to 1953, with copper, silver and gold mined in 1928 and 1929, with a manufacturing of 5.7 tonnes of copper. 647 ounces of silver and 1 ounce of gold. Open-pit tungsten manufacturing on the Ivanhoe Mine started in October 1953 and was first shut down in 1957. Whole manufacturing throughout this era was 567 thousand tons, with a median grade of 0.35% WO3. Related skarn tungsten mineralization was mined by Minerals Engineering Firm from 1952 to 1956 in a sequence of facet holes and small open pits on the Misplaced Creek Mine, roughly 5 km southeast of Ivanhoe. The full manufacturing recorded at Misplaced Creek throughout this era is nineteen thousand tons with a median grade of 0.18% WO3. Each mines remained idle till 1971, when Basic Electrical bought the land and rebuilt a manufacturing unit in Ivanhoe, which operated till 1975. Small quantities of tungsten manufacturing from greenstone mines had been additionally recorded within the Fifties, with manufacturing of 900 kg of screened ore containing 1.2% WO3. The full manufacturing of tungsten ore within the space from the Fifties to the Nineteen Seventies is estimated at roughly 680,000 tons.
*For the total launch, together with tables and figures, please see under.
https://investorhub.redmountainmining.com.au/funds/7574526
About Purple Mountain Mining Restricted:
Purple Mountain Mining Restricted (ASX:RMX) is a mineral exploration and improvement firm. Purple Mountain has a portfolio of crucial minerals and gold tasks in the USA, Canada and Australia. Purple Mountain is advancing the Armidale Antimony Gold Mission in New South Wales, the Utah Antimony Mission within the Antimony Mining District of Utah, the US, the Fly Lake Gold Mission, and lithium tasks within the US.
sauce:
Purple Mountain Mining Restricted
contact:
mauro piccini
firm secretary
