Crown Prince East high‑grade hits: pit design and dilution notes for mine planners
Reviewed by Tom Sullivan

First reported on Australian Mining
30 Second Briefing
High‑grade reverse circulation drilling intercepts at New Murchison Gold’s Crown Prince East pit are building confidence ahead of open‑pit mining, with recent hits including multiple narrow high‑grade zones that extend known mineralisation down‑dip and along strike from the existing Crown Prince pit. The company has already completed the first production blast at Crown Prince, integrating the new data into short‑term mine planning and grade control for the East pit. For geotechs and mine planners, the results support pit shell optimisation, potential cut‑back designs and tighter dilution control in the early mining phase.
Technical Brief
- Integration of new RC data into short‑term planning implies rapid turnaround of assay, survey and geological modelling workflows.
- Spatial extension of mineralisation along strike and down‑dip will likely require updated geotechnical domains for pit wall design.
- Early confirmation drilling at the satellite East pit reduces reliance on conservative dilution and recovery factors in initial cashflow models.
- For similar narrow‑vein open pits, such pre‑mining RC programmes typically tighten blast design, ore–waste boundary definition and stockpile management.
Our Take
New Murchison Gold’s recent reports of Crown Prince production outperforming feasibility forecasts suggest that additional high-grade material at Crown Prince East could further strengthen project cash flow and shorten payback for this Western Australian gold asset.
With the Lydia project already flagged in our coverage as a potential new ore feed source for Crown Prince, strong results at Crown Prince East point to New Murchison Gold building a multi-source ore pipeline that can smooth grade profiles and reduce reliance on any single pit or underground panel.
Among gold-tagged project stories in our database, Crown Prince in Australia stands out for the rapid sequence from discovery drilling to above-plan production, signalling that regulators, contractors and infrastructure in this region are currently enabling relatively fast project execution for mid-tier gold operators.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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