Editor's Note: The Drill Down is a weekly summary of the best drill results reported by companies in SNL's coverage space, as aggregated by SNL Metals & Mining. This edition is a special two-week summary due to the recent Easter holiday.
An assay from Fission Uranium's Patterson Lake South property in Saskatchewan took the top spot for the two weeks ended April 3. Additional highlights include a tin result from the Democratic Republic of the Congo and a zinc interval from Turkey.
Uranium
Fission Uranium Corp. reported the best drill result for the two-week period, from its Patterson Lake South property in northwestern Saskatchewan.
Highlights from drill hole PLS15-343 at the R600W zone included an interval of 44.0 meters grading 3.36% U3O8 from a depth of 107.0 meters. The result, valued at US$133,632 by SNL Metals & Mining, included a 9.0-meter subinterval grading 14.74% U3O8 from 121.0 meters.
Fission Uranium noted that the drill hole was the first at the R600W zone to encounter large amounts of strong anomalous radioactivity. Assays for follow-up drilling at the zone, which hit similarly wide intercepts of strong radioactivity, are pending.
Tin
Valued at US$50,965 by SNL, the top tin interval was one posted by Alphamin Resources Corp. from its wholly owned Bisie tin project in the Democratic Republic of the Congo.
Recent metallurgical drilling at Bisie intersected 26.45 meters grading 9.20% tin from 66.0 meters in drill hole METBGC017, including an 8.75-meter subinterval grading 24.49% tin from 83.70 meters. The company incorporated metallurgical drill results in an 
updated resource estimate for Bisie, with 119,240 tonnes of tin in the indicated category and 42,800 tonnes of tin in the inferred category.
Alphamin Resources also announced a new discovery at Bisie, dubbed The Wedge, located immediately to the south of and adjacent to current resources, with drill results including 20.0 meters grading 4.31% tin from 83.0 meters. The company aims to define a measured resource for the new zone as part of a further resource update slated for June.
Zinc
Exploration drilling at Pasinex Resources Ltd. 's 50%-owned Pinargozu property in Adana, Turkey, yielded the best zinc result. The operation is a joint venture with Turkish mining company Akmetal Madencilik Sanayi ve Ticaret AS.
Assays from eight diamond drill holes recently completed at Pinargozu included a highlight of 35.50 meters grading 37.72% zinc from 113.0 meters in drill hole PPS15_004, which was evaluated at US$28,931 by SNL.
The result is the best intercept at Pinargozu to date according to the company and included a subinterval of 31.50 meters grading 42.38% zinc from 115.0 meters. Drilling is ongoing at Pinargozu and has also kicked off on the neighboring Akkaya property.
Copper
Cornerstone Capital Resources Inc. reported the No. 1 copper assay for the two-week period, from its early stage Cascabel project located in Esmeraldas, Ecuador.
The company holds a 15% interest in Cascabel, financed through to completion of a feasibility study, with SolGold Plc owning the remaining 85% stake.
Recent drilling confirmed that high-grade copper-gold mineralization extends to the northwest, with highlights including an interval of 446.0 meters grading 0.38% copper and 0.36 g/t of gold from a depth of 394.0 meters in drill hole CSD-15-010. SNL gave the result a value of US$16,585.
Cornerstone Capital noted that the drill hole had been temporarily suspended at a depth of 969.05 meters due to technical difficulties. Once resolved, drilling will resume, focused on extending high-grade mineralization intersected in two previous drill holes.
Gold
A result from Odin Mining & Exploration Ltd. 's early stage Cangrejos property in El Oro, Ecuador, was the top gold interval.
The company reported that results from a phase-one campaign, comprising nine holes totaling 3,540 meters, extended mineralization and also indicated continuity of mineralization at Cangrejos. Better results included 405.10 meters grading 0.66 g/t of gold and 0.09% copper from surface in drill hole C14-47, which was valued at US$12,176 by SNL.
Odin Mining & Exploration plans to incorporate the results in an NI 43-101-compliant resource estimate and has initiated a scoping-level metallurgical test program along with a conceptual project siting and environmental study.
Silver
Evaluated at US$7,686 by SNL, the top silver assay was one reported by Kootenay Silver Inc. from its Promontorio property in Sonora, Mexico.
The first six holes of an ongoing phase-two drill program focused on the La Negra discovery all intercepted significant widths and grades of mineralization to reaffirm results from the company's phase-one discovery program. La Negra is located approximately 6.5 kilometers to the north of the Promontorio deposit.
Drilling intersected 180.0 meters grading 66.12 g/t of silver, 0.062 g/t of gold and 0.22% lead from surface in drill hole LN-31-15, including a 1.0-meter subinterval grading 3,040.0 g/t of silver, 0.434 g/t of gold and 0.24% lead. Kootenay Silver is focused on expanding known mineralization while defining the limits and geometry of the diatreme breccia zone.