Lea-Grant Mine (Lea Grant Mine; Toothache Mine; Wild Turkey Mine; Juniper Mine; Jupiter Mine), Llanada, Central San Benito Mining District, San Benito County, California, USAi
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Latitude & Longitude (WGS84):
36° 33' 34'' North , 120° 50' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Three Rocks | 246 (2011) | 40.6km |
| Greenfield | 17,184 (2017) | 44.8km |
| Soledad | 25,003 (2017) | 46.0km |
| Mendota | 11,430 (2017) | 46.2km |
| King City | 13,902 (2017) | 46.3km |
A former Hg occurrence/mine located in secs. 1, 2, 11, 12, T16S, R10E, MDM, 8.7 km (5.4 miles) SE of Llanada, along the W canyon wall of Griswold Creek, on private land. Discovered in 1940. MRDS database stated accuracy for this location is 10 meters.
Mineralization is hosted in rocks of the Upper Cretaceous Panoche Formation (sandstone). The ore body is irregular. Local alteration includes induration of the Panoche rocks. Local rocks include Plio-Pleistocene and Pliocene loosely consolidated deposits and/or Upper Cretaceous marine rocks, unit 1 (Upper Great Valley Sequence).
Local geologic structures include local fracturing.
Workings include unspecified surface and underground openings with a length of 304.8 meters and an overall depth of 30.48 meters (the topo map reflects 1 adit symbol at this point).
Production statistics: Year: 1962 (period = to 1962): Hg (estimated): ^16-20 pounds Hg/ton (569 grams Hg per metric ton).
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
4 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Alunogen Formula: Al2(SO4)3 · 17H2O Colour: Pale yellow Description: Occurs as nodular crusts on mine tunnel walls. |
| ⓘ Cinnabar Formula: HgS Description: Occurs disseminated in fault breccia and silica-carbonate rock. References: |
| ⓘ Gypsum Formula: CaSO4 · 2H2O |
| ⓘ Metacinnabar Formula: HgS Description: Occurs disseminated in fault breccia and silica-carbonate rock. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Metacinnabar | 2.CB.05a | HgS |
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Alunogen | 7.CB.45 | Al2(SO4)3 · 17H2O |
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| O | Oxygen | |
| O | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| Al | Aluminium | |
| Al | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| S | Sulfur | |
| S | ⓘ Alunogen | Al2(SO4)3 · 17H2O |
| S | ⓘ Cinnabar | HgS |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| S | ⓘ Metacinnabar | HgS |
| Ca | Calcium | |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
| Hg | ⓘ Metacinnabar | HgS |
Other Databases
| Link to USGS MRDS: | 10103830 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
- Great Valley BasinBasin
USA
- California
- Diablo RangeMountain Range
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