Overview

Mine Type	Underground
Stage	Permitting
Commodities	Zinc Lead Gold Silver Copper Tin
Mining Method	Sub-level stoping Cut & Fill Transverse stoping Sub-level open stoping (SLOS)
Backfill type	...
Mine Life	...
Snapshot	The Lagoa Salgada project is a high-grade polymetallic project, demonstrating a typical mineralization endowment of zinc, copper, lead, tin, silver, and gold. Extensive exploration upside potential lies both near deposit and at prospective step-out targets across the large 7,209-hectare property concession. July 15, 2024 - Ascendant Resources Inc. files the successful submission of additional and revised information as part of the final stage in the Environmental Impact Assessment (“EIA”) process for its Lagoa Salgada project.

Deposit type

• VMS

Summary:

From a genetic point of view the Lagoa Salgada deposit is considered a polymetallic Volcanogenic Massive Sulfide (VMS). These deposits arise from the association between volcanic events and hydrothermal activity in a submarine environment.

In the Lagoa Salgada deposit, sub seafloor alteration affected rhyodacite with phenocrysts of quartz and feldspar and a rhyodacite with quartz phenocrysts intercalated with a sandstone (Matos et al. 2000). The true thickness of the Lagoa Salgada lithostratigraphic sequence is difficult to determine, as there are disruptions and repetitions of the volcaniclastic units due to the presence of inverse faults.

The mineralization types are different for each sector of the Lagoa Salgada deposit. They all show different typologies and modes of occurrence although all the mineralization domains are polymetallic.

NORTH SECTOR
The north sector of this deposit shows four distinct mineralization domains, namely the gossan, the transition massive sulfides, the primary massive sulfides, and the stringer zone. The gossan (Gos) mineralization results from the supergene alteration of the primary massive sulfides after intense oxidation and weathering when the primary mineralization was exposed to the paleosurface. The net effect of the supergene effect is the enrichment of less mobile elements such as Au Ag, Sn and Pb.

The transitional massive sulfides (tMS) zone is also the result of a supergene process. Some of the metals leached in the relatively shallower oxidizing levels and precipitated immediately below more reductive conditions (below the paleo water table). This domain is particularly rich in Cu, Pb and Ag.

The primary massive sulphides (pMS) result from the extraction of metals from deeper volcanic rocks that, by dissolution in the aqueous solutions through the interaction between water and rock. These were transported and subsequently cooled, causing the precipitation of metals such as Cu, Pb, Zn and Sn in the case of the Lagoa Salgada and creating massive sulphide lenses due to the circulation of hydrothermal fluids.

The stringer (Str) domain is characterized by stockwork polymetallic mineralization occurring in intermediate-basic volcanic rocks at the bottom of the primary massive sulphides. From a metallogenetic point of view, these were the corridors that fed the massive sulphide lens.

SOUTH SECTOR
The mineralization style at the south sector of the Lagoa Salgada deposit is different from the north showing two distinct domains, the semi-massive sulphides (sMS) zone, and the fissure remobilization (FR) mineralization zone.

The first sMS mineralization which is only present in the esV lithologies is characterized by semi massive pyritic intercalated with volcanic rocks. It is believed that the esV lithology is the lateral equivalent of the north sectors massive sulphides, representing a distal volcanogenic massive sulphide related facies. Both units have been tectonically packed into sub-vertical lenses following the latest stage of deformation.

An important fact to retain about the FR domain is that the hosting rocks between the three corridors still carry some lower grade but potentially economic mineralization. The 3 corridors represent some higher-grade zones within a broader envelope of mineralized iV rocks. The FR domain is polymetallic with Cu, Zn, Pb, and Ag; however, Cu (chalcopyrite) and Zn (in sphalerite) are predominant. From a genetic point of view, the occurrence of this mineralization occurred through a post-orogenic percolation of the mineralized fluids induced by an epigenetic hydrothermal alteration in the iV rocks.

Mining Methods

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Comminution

Crushers and Mills

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Processing

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Production

Operational metrics

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Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Jul 28, 2023
.......................	.......................		Jul 28, 2023
.......................	.......................		Sep 3, 2024