Ann: Gold Extraction Results from Ema and Tres Estados, page-105

re leaching :THat's a valid question that was raised in a previous post.Heap leaching is a well established method (? the past 15 years) and is considered for major deposits (eg AEE's Haggan deposit)- here's a recent article:
http://www.mining.com/heap-leach-minings-breakthrough-technology/
Here's the crux:
The main advantages of HL technology are, as follows:

• lower CAPEX and OPEX
• rapid payback
• no tailings disposal
• simple design and equipment
• less environmental concerns
• quick construction phase
• lower energy and water requirements
• applicable to low-grade ore, tailings and waste stockpiles

Currently, HL technology is successfully used to extract gold, silver, copper, nickel, uranium, and even iodine.
There's still many steps for BBX to take,but the indications are that BBX has a pathway headed in the right direction.