The oxide gold mineralisation at Diba is predominantly found in saprolite
within 50m of surface and across a compact 800m x 600m area which has been drilled to date.
Please refer to the technical report "Preliminary Economic Assessment of the Eagle Mountain Saprolite
Gold Project, Guyana" dated September 12, 2014.
A significant portion of high grade saprolite
within the deposit is amenable to the Rotary Kiln Electric Furnace (RKEF) process route to produce ferro-nickel, potentially providing a further high-grade feed source for the Araguaia project;
Production is expected to decrease to 560,000 ounces in 2020 and 450,000 ounces in 2021 as the Tapado Oeste pit and Yanacocha laybacks are mined out and Merian transitions from saprolite
to hard rock.
It exports saprolite
and limonite ore to processors in China and Japan, and sells limonite ore to downstream processing plant affiliates.
Arc Minerals' geologist described the higher grade intersections from its widely spaced drilling at Cheyeza as located within a black saprolite
thought to be the result of deep oxidation and supergene processes have formed an apparent sub-surface, secondary oxide tabular shaped body, that appears to have been influenced meteoric waters.
'The combined effects of the company focusing more on shipments of its higher value saprolite
ore, a stronger US dollar and the increase in the company's share of profits from its investments in Coral Bay and Taganito processing plants resulted in a significant improvement in earnings during the period,' NAC said.
and saprock materials are not included in the current processing plan, as they respond poorly to the concentration processes.
At this site, the iron sandstone layer occurs in sandy cover deposits of unknown age, a few metres above the top of the arkose-derived saprolite
. The Menkao site is situated near the edge of the Plateau des Batekes, an extensive plateau area that corresponds to a region with a thick sequence of Cenozoic deposits as surface formation.
The Property has three known gold bearing areas, specifically the alluvial areas, the saprolite
, and the underlying hard-rock.
PGMC has been supplying Baosteel Resources with low-grade limonite ore to high-grade saprolite
since 2014, according to FNI.
 proposed typical [beta] values for bored piles in granite saprolite
constructed with different methods: the 95% confidence range of [beta] is 0.2-0.4 for piles constructed by grabbing/reverse circulation drilling (RCD) underwater with/without temporarycasing, 0.4-0.8 for piles postgrouted after construction by grabbing underwater with temporary casing, and 0.1-0.2 for piles constructed by RCD under bentonite.