Ladd Mine (Old Ladd Mine; Corral Hollow Mine; Carral Hollow Mine), Castle Rock, Ladd-Buckeye Mining District, San Joaquin County, California, USAi
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Latitude & Longitude (WGS84):
37° 36' 24'' North , 121° 29' 45'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Tracy | 87,075 (2017) | 16.0km |
| Mountain House | 9,675 (2011) | 20.1km |
| Livermore | 88,126 (2017) | 25.4km |
| Westley | 603 (2011) | 26.9km |
| Grayson | 952 (2011) | 28.3km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Livermore Valley Lithophiles | Livermore, California | 25km |
| Stockton Lapidary & Mineral Club | Stockton, California | 43km |
| Mother Lode Mineral Society | Modesto, California | 44km |
| Santa Clara Valley Gem & Mineral Society | San Jose, California | 46km |
A Mn-Fe-Ba-Al-silica mine located in secs. 2 & 11, T4S, R4E (MDM), 3.4 km (2.1 miles) S of Castle Rock (coordinates of record), about 13 road miles from Tracy. Discovered and first production in 1867. Owned by E. L. Lake,et al (100.00%), Lakewood, Ohio 44107 (1975). MRDS database stated accuracy for this location is 100 meters.
NOTE: Yale Peabody GNIS database, based on USGS topo maps, places this mine in San Joaquin Co. (area is near county line).
Mineralization is hosted in Late Cretaceous Franciscan Complex, Calaveras Group chert. The ore body strikes N45W and dips 75W at a thickness of 25 meters, a width of 35 meters, and a length of 250 meters. 2 ore beds lie in chert more than 200 feet in thickness which strikes NW and dips from 30 to 90 SW. The beds are folded in places. The 2 ore bodies are 125 feet apart. The lowest or East one is 800 feet long, with a maximum thickness of 35 feet, and consists of 1 to 16 feet of high-grade ore at its base with 2 to 30 feet of disseminated ore above. The upper ore body is 125 feet long, 100 feet maximum width, and 4 feet maximum thickness. 2 steep-angle faults have caused the black between the faukts to be displled 200 feet to the W. There are many minor faults present. The ore passes into carbonate and bementite at the lower level.
The ore bodies are 1.) sedimentary and lenticular in fotrm, and 2.) a shear zone. The primary mode of origin was sedimentation and the secondary mode was hydrothermal emplacement. Primary ore control was bedding and secondary was fracturing. There is no wallrock alteration. The iron ore is comprised of red, earthy hematite as shale. Local rocks include Franciscan Complex, unit 1 (Coast Ranges).
Workings include unspecified underground openings.
Analytical data results: Average 18% Mn (unsorted).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
8 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:
| ⓘ Bementite Formula: Mn7Si6O15(OH)8 References: |
| ⓘ Hausmannite Formula: Mn2+Mn3+2O4 References: |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Inesite ? Formula: Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O Description: Common. |
| ⓘ Kaolinite Formula: Al2(Si2O5)(OH)4 References: |
| ⓘ Manganite Formula: Mn3+O(OH) References: |
| ⓘ 'Psilomelane' References: |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Rhodochrosite Formula: MnCO3 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Hausmannite | 4.BB.10 | Mn2+Mn3+2O4 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Manganite | 4.FD.15 | Mn3+O(OH) |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Rhodochrosite | 5.AB.05 | MnCO3 |
| Group 9 - Silicates | |||
| ⓘ | Inesite ? | 9.DL.05 | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| ⓘ | Kaolinite | 9.ED.05 | Al2(Si2O5)(OH)4 |
| ⓘ | Bementite | 9.EE.05 | Mn7Si6O15(OH)8 |
| Unclassified | |||
| ⓘ | 'Psilomelane' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Bementite | Mn7Si6O15(OH)8 |
| H | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| H | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| H | ⓘ Manganite | Mn3+O(OH) |
| C | Carbon | |
| C | ⓘ Rhodochrosite | MnCO3 |
| O | Oxygen | |
| O | ⓘ Bementite | Mn7Si6O15(OH)8 |
| O | ⓘ Hausmannite | Mn2+Mn23+O4 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| O | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| O | ⓘ Manganite | Mn3+O(OH) |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rhodochrosite | MnCO3 |
| Al | Aluminium | |
| Al | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | Silicon | |
| Si | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Si | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Si | ⓘ Kaolinite | Al2(Si2O5)(OH)4 |
| Si | ⓘ Quartz | SiO2 |
| Ca | Calcium | |
| Ca | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Mn | Manganese | |
| Mn | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Mn | ⓘ Hausmannite | Mn2+Mn23+O4 |
| Mn | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| Mn | ⓘ Manganite | Mn3+O(OH) |
| Mn | ⓘ Rhodochrosite | MnCO3 |
| Fe | Iron | |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
Other Databases
| Link to USGS MRDS: | 10036233 |
|---|
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
- Sonoma-Livermore BasinBasin
USA
- California
- Diablo RangeMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060770004
