Drill Intercept Database Guide: How to Filter Noise Before You Rank Discoveries

> Key takeaway: A drill intercept database is only useful if you filter it before you trust it.

Last Updated: 2026-03-02 | Reading Time: 8 min | Data Source: Mining Terminal live drill intercept snapshot

Quick summary

• Mining Terminal currently stores 905,104 drill intercept rows.
• Raw gram-meter rankings can be polluted by proxy commodities, unusual units, and interval outliers.
• The highest-value drill product is not a raw leaderboard. It is a filtered discovery monitor.

Why raw drill rankings mislead

The current dataset includes:

| Signal | Count |
| --- | --- |
| Rows with proxy/non-core commodities | 1,611 |
| Rows with grade above 10,000 | 2,012 |
| Rows with interval above 1,000m | 318 |
| Rows with gram-meters above 1,000,000 | 130 |

That does not mean the data is bad. It means the data is heterogeneous, and heterogenous datasets need rules.

A practical filtering framework

1. Filter by commodity family first

Do not compare gas-equivalent or radioactivity-style rows directly against conventional hard-rock drill hits if the goal is equity discovery ranking.

2. Normalize the unit context

A spectacular-looking grade can still be the wrong comparison set if the unit or underlying proxy variable is different from the rest of your screen.

3. Review long-interval outliers separately

Very large intervals may be valid, but they should be reviewed in a separate bucket before being mixed into a ranking product.

4. Cross-check the source filing type

In our latest sample of 400 documents classified as drilling news releases, 8 had no drill intervals at all.

Live outlier examples

| Company | Commodity | Hole | Interval m | Grade | Gram-meters |
| --- | --- | --- | --- | --- | --- |
| Lakes Blue Energy NL | Gas | Wombat-5 | 200.00 | 358200.00 ppm | 71,640,000 |
| Lakes Blue Energy NL | Gas | Wombat-5 | 91.00 | 651200.00 ppm | 59,259,200 |
| Whitebark Energy Ltd | Methane | IVY 10 | 5600.00 | 5600.00 ppm | 31,360,000 |
| Firefly Metals | Gas Equivalent | Turnbull #3H | 1146.05 | 13870.00 mscfe/d | 15,895,700 |
| NexGen Energy Ltd. | Radioactivity | AR-17-117c1 | 151.50 | 61000.00 cps | 9,241,500 |
| Firefly Metals | Gas Equivalent | Turnbull #2H | 1564.58 | 5890.00 mscfe/d | 9,215,400 |
| NexGen Energy Ltd. | Radioactivity | AR-17-114c2 | 139.00 | 61000.00 cps | 8,479,000 |
| NexGen Energy Ltd. | Radioactivity | AR-17-116c2 | 111.00 | 61000.00 cps | 6,771,000 |

What a premium drill product should do

• Remove or separately classify proxy commodities
• Flag extreme unit and interval outliers
• Tie discovery rows back to filing quality and issuer cadence
• Publish filtered watchlists instead of raw dumps

FAQ

What is the best metric for ranking drill results?

There is no universal best metric. Gram-meters can be useful, but only inside a comparable commodity and unit set.

Why do some top drill rows look strange?

Because extracted datasets can include proxy commodities, energy-style rows, or unit mismatches that need filtering.

Should investors trust raw drill leaderboards?

No. Use them as a starting point, then filter by commodity, unit context, and filing quality.

Bottom line

The value of a drill intercept database is not the row count alone. It is the quality of the filtering rules wrapped around it.