Geopacific Resources (ASX:GPR) has posted a scoping study for its PNG-based gold project called Woodlark. The company calculates Woodlark to have a pre-tax value of $625M at a A$2.9K gold price. Pre-tax IRR is calculated at 40.5%. Revenue across the 12Y LOM – “undiscounted” – is calculated at A$3.3B, with a pre-tax cashflow of A$1.3B. This is compared to a pre-production capital estimate of A$326M for mine development, a gold plant and other infrastructure costs. Geopacific noted on Tuesday that volatility in the gold spot price, a lot of it upward in recent history, only makes the project loo…