Lilly Prospect, Nome Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Lilly Prospect | Prospect |
| Nome Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 40' 42'' North , 165° 28' 37'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Nome | 3,806 (2018) | 20.0km |
Location: The Lilly prospect is at an elevation of about 850 feet on the divide between the headwaters of Twin Mountains Creek and Bangor Creek. It is about one-quarter mile south of hill 992, in the NW1/4SE1/4 section 28, T. 9 S., R. 34 W., of the Kateel River Meridian. It was included in locality 36 of Cobb (1972 [MF 463], 1978 [OFR 78-93]). The prospect is locality 9 of Hummel (1962 [MF 247]) and it is located to within 500 feet.
Geology: The Lilly prospect consists of pyrite and arsenopyrite in quartz veins and disseminated in silicified graphitic marble and schist near old prospect pits that probably are just east of the Rodine fault (Bundtzen and others, 1994). Soil samples in the area contain as much as 335 ppb gold and 1,650 ppm arsenic. In 1991, Kennecott Exploration Company cut two 2,000-foot-long backhoe trenches aligned north-south extending through the site (C.C. Hawley, Cindy Buxton, and Duane Olson, written communication, 1992). In addition to anomalous soil values near the old prospect, a vein zone that strikes east-northeast was discovered about 2,000 feet to the south. Soils over the vein zone contain more than 600 ppb gold and more than 4,000 ppm arsenic. The zone apparently contains local concentrations of free gold that were mined in a hill-slope placer deposit less than one-half mile southeast of the Lilly area (NM190). The Lilly lode was briefly described by Cathcart (1922, p. 252).
Workings: Exploration includes early 1900's prospect pits and more than 2,000 feet of trenches cut here in 1991 by Kennecott Exploration Company.
Age: Mid-Cretaceous or younger; postdates mid-Cretaceous regional metamorphism.
Alteration: Silicification; introduction of arsenopyrite into schist.
Commodities (Major) - Au
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
5 valid minerals.
Detailed Mineral List:
| ⓘ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 |
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | Oxygen | |
| O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | ⓘ Quartz | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | NM189 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
- Nome ComplexAccretionary Complex
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