Objectives:    

Procedure:

Stake a claim on Eureka Gulch:

1.  Use the USGS 1 inch = 1 mile topographic map to locate Eureka Gulch (Map 1).  Gather information from the map needed to fill out a state mining claim notice.  Assume your land status research indicates no pre-existing claim, the site is open to staking, and you have established the four cornerposts.

2.  Use a ruler and pencil to divide “quarter” the section, then quarter the quarters.  This shows the maximum number of claims in the section (16).  Each is 1320 x 1320 feet.  Identify the claim outline which contains Eureka Gulch.

3.  Fill in the Claim name/number (make up your own, but make it short and simple).

4.  Fill in the Discovery Date and the Location Posting Date.  Make sure the discovery date precedes the posting date.

5.  Fill in the dimensions of the claim.  It is the size of a standard mining claim.

6.  Fill in the meridian (Kateel River);  township,  range,  section,  and quarter section by looking at the map.

7.  Fill in the “recording district”  (Cape Nome).

8.  Fill in the name and address of the locator (you).

9.  Sign on the line that says “signature” and check the box underneath which says “owner”.

10. Where it says “claim sketch”, black in the box which applies to the claim (use the example map to the right).

Design a soil sampling program location and estimate a budget:

A stream sediment survey was completed last season (Map 2), but the samples were only analyzed for arsenic.  A client wishes to drill for gold in this area by conducting a soil survey.  As project geologist you are asked to select the best location for a grid sampling project, complete the project, select a site for one diamond drill hole, and supervise the drilling.  The grid spacing should be 100 meters x 100 meters for adequate coverage to define a drill target.  Make the sample grid 2000 meters (north-south) by 4000 meters (east-west).  Client will hire a team of 4 Geotechs to conduct the soil sampling.  The drill hole will be drilled to a depth of 300 feet.  Estimate the cost of the soil sampling program, and the cost of the drilling program.

1.  Plot the arsenic values of stream sediments (Table 1) at the appropriate locations on the stream sediment sample location map. 

2.  Choose 500 ppm as an arbitrary threshold value, ie, all values above 500 ppm are considered anomalous.  Draw a red circle around the anomalous sample locations to highlight them.

3.  Draw the outline of the soil grid using the scale provided.  Position the grid to encompass the anomalies with the highest values, as well as the anomalies which are located furthest upstream.

4.  Use the dollar figures below to estimate the total exploration program budget.

Item	Cost	Other Information
Geotech	$150/day	Soil sampling rate = 20 / day
Project geologist	$300/day
Base Camp cost	$350/day
Misc. Field Supplies	$2500
Sed and Soil Sample geochem	$15/sample
Diamond drilling	$32/foot	Drilling rate = 100 feet / day
Diamond drill mobe/demobe	$4500	$6500
Core sample geochem	$18/sample	Samples will be 2 foot intervals.

MAP  1 Download Map in PDF format

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Download Claim in PDF format

 

Table 1

Location	As (ppm)	Location	As (ppm)
1	68	25	186
2	50	26	<10
3	70	27	42
4	50	28	35
5	45	29	65
6	325	30	2000
7	<10	31	70
8	400	32	700
9	88	33	680
10	142	34	92
11	192	35	142
12	130	36	925
13	82	37	125
14	600	38	160
15	198	39	110
16	280	40	130
17	48	41	95
18	92
19	85
20	135
21	400
22	750
23	950
24	138

Download Map 2 in PDF format