Hola Mick, my friend this is not the same prospect I know, but it is from Marmoto which is part of the same belt & system of mineralisation and which has reported approx 14.4 million ounces.. The following tech report was compiled for the latest expansion project and being dated this year we can consider it to be relevant. Also you will notice it is very similar topography.. And though it may not set the house on fire for some the area has consistently produced 20-30'000 ounces per year for the last 15 years... NPV on current expansion alone is $256m... What more do people want?
And apologies for the resource ref error it is from the original doc.. 8H
NI 43-101 Technical Report Pre-Feasibility Study Marmato Project Colombia Effective Date: March 17, 2020 Report Date: August 17, 2020 Report Prepared for Caldas Gold Corp. 401 Bay Street, Suite 2400 Toronto, Ontario, Canada M5H 2Y4 Report Prepared by SRK Consulting (U.S.), Inc. 1125 Seventeenth Street, Suite 600 Denver, CO 80202 SRK Project Number: 557200.030
1.2 Geology and Mineralization The local geology is dominated by porphyritic dacitic and andesitic intrusions, which host themineralization at Marmato. The intrusions are characterized by quartz, hornblende, biotite and zoned SRK Consulting (U.S.), Inc.NI 43-101 Technical Report – Marmato Project Page 2MMS/KD Marmato_PFS_NI43-101_557200-030_Rev08.docx August 2020plagioclase phenocrysts in a finely crystalline quartz-plagioclase groundmass, with variations inphenocryst proportion and sizes between intrusions. A total of five different porphyry units have beenidentified.The Marmato gold deposit consists of a structurally controlled epithermal vein system with a mineralassemblage dominated by pyrite, arsenopyrite, black iron (Fe) rich sphalerite, pyrrhotite, chalcopyriteand electrum in the Upper Zone (UZ), and a mesothermal veinlet system with a mineral assemblagedominated by pyrrhotite, chalcopyrite, bismuth minerals and visible gold in the MDZ.
The mineralization in the current mine consists of three distinct phases, a first phase characterized bythe mesothermal vein/veinlet mineralization, which defines the MDZ, followed by an epithermal lowsulfidation style, superimposed by an epithermal intermediate sulfidation phase. Gold‐silvermineralization is mainly hosted by a pyrite+sphalerite vein to veinlet system fitting in a sinistraltranspressional shearing system, associated with intermediate argillic alteration within the hostporphyryitic rocks. Approximately 92% of the gold/silver-bearing particles are intergrown with sulfidesor occur at sulfide gangue grain boundaries. Current mining in the area is via narrow undergroundstoping of the higher-grade vein mineralization.The MDZ mineralization consists of a network of thin, less than 5 centimeters (cm), sulfide veinlets,mainly pyrrhotite+chalcopyrite, hosted in weak argillic and deeper potassic alteration which is relatedto a previous event and rimmed by a thin sodium-calcitic alteration halo, which is related to themineralization. Recent geological reports on MDZ (Sillitoe, 2019) concluded: • Gold grade distribution in the Zona Baja (MDZ) mineralized orebody is unrelated to thepresence of distinct porphyry phases and is entirely dependent on the intensity of structurallylocalized veinlets • Potassic alteration, represented chiefly by biotite, is progressively better preserved at depth inthe Zona Baja, raising the possibility that early potassic alteration could also be gold bearing,but further work is required to confirm this theory • Gold distribution appears to be exclusively a product of veinlet intensity and orientation relatedto structural controls during orogenesis. The veinlets responsible for much of the Zona Bajagold are those containing quartz, pyrrhotite and traces of chalcopyrite and having prominentalbite alteration halos • The presence of visible gold is also noted in the core and, as expected, relates to increasedassay values when presentMineralization occurs in parallel, sheeted and anastomosing veins (vein domain), all of which follow aregional structural control, with minor veins forming splays of the main structures (splays) which oftenhave limited strike or dip extent. The upper vein domain intersects broader zones of intense veinletmineralization (termed porphyry domain in this Technical Report) that is hosted by a lower grademineralized porphyry stock. In addition, a discrete, relatively high-grade core (feeder zone) to the maindeeper mineralization termed locally as the MDZ.The upper portion of the MDZ has been exposed in Level 21 of the existing Caldas mining operations,while deeper sections have been observed in drillcore, both of which have been confirmed as differentstyles of mineralization. The lowest levels of the mine have currently intersected a combination of theporphyry domain, where the gold is associated with pyrite veinlets, and the MDZ where gold isassociated with pyrrhotite. There is a transition zone existing between the two domains, which is observed to some extent in the current mine workings with overprinting of the epithermal system onthe MDZ. The vertical extent of the transition is not clearly defined from the current drilling. Currently,underground mining at the Caldas-operated mine remains focused on the vein structures located inthe central portion (Zona Baja) of the Marmato deposit. Diamond drilling indicates that the veins typically range between 0.5 and 5 m wide and extend for 250to 1,000 m along strike and 150 to 750 m down dip. These observations are supported by undergroundmining which has confirmed that individual vein structures have good geological continuity and canextend for 100 to 800 m along strike and 100 to at least 300 m down dip. Between 2017 and 2020,CGM has worked on updating the quantity of the underground channel sampling captured in thedatabase, which has increased the information available to model the vein domains.The broad zones of veinlet mineralization in the porphyry domain was modelled initially by SRK in2017 and typically varied from 10 to 230 m wide, reaching up to 340 m wide in areas of significantveinlet accumulation, while extending with good geological continuity for between 200 m andapproximately 950 m along strike and between 100 and 900 m down dip. SRK has updated thesedomains during the 2019 geological modelling process using more discrete zones and application ofan indicator grade shell approach using a 0.5 grams per tonne (g/t) gold (Au) cut-off grade (CoG).At depth within the central portion of the deposit, SRK has noted a zone of elevated grades which hasbeen referred to as the higher grade MDZ (more than 2 g/t Au). This zone is indicated to be continuousalong strike for approximately 500 m and has a confirmed down dip extent that reaches up to 800 m,with a thickness that varies between 35 and 150 m. It is possible that the main MDZ mineralization isbounded within a series of faults but limited drilling at the edges of the deposit make confirmationdifficult to assess at this stage. To avoid the potential for volumetric “blow-outs”, SRK has used thefaults as a hard boundary in the geological domaining process.
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