Clark Mountain thrust complex, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino County, California, USAi
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Latitude & Longitude (WGS84):
35° North , 115° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
Type:
KΓΆppen climate type:
Mindat Locality ID:
122753
Long-form identifier:
mindat:1:2:122753:9
GUID (UUID V4):
a80a1d37-487b-4644-83bc-a09e7f0e52c0
The Clark Mountain thrust complex is located at the intersection of the Mesozoic magmatic arc and the east Sierran and Sevier thrust belts. New U-Pb zircon ages for granitic rocks establish the timing of deformation within the thrust complex. The Pachalka thrust, structurally the highest fault in the complex, carries plutonic rocks eastward above Cambrian rocks. Hanging-wall and footwall rocks are mylonitic near the thrust. Hanging-wall plutonic rocks, previously considered Precambrian, are dated at 146 62 Ma and thus are Late Jurassic. Folds kinematically related to thrusting in footwall metasedimentary rocks are overturned eastward and cut by the Pachalka pluton dated at 142 Β± 7 Ma. This brackets thrusting and related deformation in structurally high levels of the complex to be latest Jurassic. The Ivanpah and Striped Mountain plutons in the Ivanpah Mountains have been dated at 147 Β± 7 Ma and 141 Β± 11 Ma, respectively. These plutons are cut by the Keaney-Mollusk Mine and Morning Star Mine thrusts, which are in turn cut by the middle to late Cretaceous Teutonia batholith. These data indicate that these thrusts are early to middle Cretaceous in age. - Geological Society of America Bulletin
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Clintonite Formula: CaAlMg2(SiAl3O10)(OH)2 |
| β Monticellite Formula: CaMgSiO4 |
| β Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| β | Monticellite | 9.AC.10 | CaMgSiO4 |
| β | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(β»4)β»[Si2O7]4[(SiO4)10]O(OH)9 |
| β | Clintonite | 9.EC.35 | CaAlMg2(SiAl3O10)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| H | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| O | Oxygen | |
| O | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| O | β Monticellite | CaMgSiO4 |
| O | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Mg | Magnesium | |
| Mg | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| Mg | β Monticellite | CaMgSiO4 |
| Mg | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | Aluminium | |
| Al | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| Al | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Si | Silicon | |
| Si | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| Si | β Monticellite | CaMgSiO4 |
| Si | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Ca | Calcium | |
| Ca | β Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
| Ca | β Monticellite | CaMgSiO4 |
| Ca | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
| Fe | Iron | |
| Fe | β Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 |
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References
