Lockne crater (Lockne impact structure), Östersund, Jämtland County, Swedeni
| Regional Level Types | |
|---|---|
| Lockne crater (Lockne impact structure) | Impact Crater |
| Östersund | Municipality |
| Jämtland County | County |
| Sweden | Country |
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Latitude & Longitude (WGS84):
63° 0' 0'' North , 14° 48' 59'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Other/historical names associated with this locality:
Lockne impact crater
Lockne is a 7.5km-wide impact structure that formed circa 455 Ma when an L-chondritic asteroid impacted mixed sedimentary and crystalline target rocks that were under a shallow epicontinental sea (500m deep) at the time. The feature and its surrounding impactite deposits were covered by Caledonian thrust nappes that also partly folded them. Erosion has breached much of the overthrust rocks to show the impact site. Impactites include the Loftarstone (graywacke-like arenite with carbonate grains), Lockne Breccia (polymictic but mostly limestone clasts), Resurge deposits, Ynntjämen Breccia (monomictic, matrix-supported with calcareous-argillaceous matrix) and the Tandsbyn Breccia (monomictic crystalline ejecta).
This crater has been suggested to be a doublet with the nearby smaller Målingen Crater, 16 km (9.9 mi) apart.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Anorthite Formula: Ca(Al2Si2O8) |
| ⓘ Anorthite var. Bytownite Formula: (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ Anorthite var. Labradorite Formula: (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ 'Fayalite-Forsterite Series' |
| ⓘ Lingunite Formula: (Na,Ca)AlSi3O8 |
| ⓘ 'Maskelynite' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | Anorthite | 9.FA.35 | Ca(Al2Si2O8) |
| ⓘ | var. Bytownite | 9.FA.35 | (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ | var. Labradorite | 9.FA.35 | (Ca,Na)[Al(Al,Si)Si2O8] |
| ⓘ | Lingunite | 9.FA.70 | (Na,Ca)AlSi3O8 |
| Unclassified | |||
| ⓘ | 'Maskelynite' | - | |
| ⓘ | 'Fayalite-Forsterite Series' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Anorthite | Ca(Al2Si2O8) |
| O | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| O | ⓘ Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| O | ⓘ Fayalite-Forsterite Series | |
| O | ⓘ Lingunite | (Na,Ca)AlSi3O8 |
| Na | Sodium | |
| Na | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Na | ⓘ Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Na | ⓘ Lingunite | (Na,Ca)AlSi3O8 |
| Mg | Magnesium | |
| Mg | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Al | Aluminium | |
| Al | ⓘ Anorthite | Ca(Al2Si2O8) |
| Al | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Al | ⓘ Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Al | ⓘ Lingunite | (Na,Ca)AlSi3O8 |
| Si | Silicon | |
| Si | ⓘ Anorthite | Ca(Al2Si2O8) |
| Si | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Si | ⓘ Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Si | ⓘ Fayalite-Forsterite Series | |
| Si | ⓘ Lingunite | (Na,Ca)AlSi3O8 |
| Ca | Calcium | |
| Ca | ⓘ Anorthite | Ca(Al2Si2O8) |
| Ca | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Anorthite var. Bytownite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Ca | ⓘ Anorthite var. Labradorite | (Ca,Na)[Al(Al,Si)Si2O8] |
| Ca | ⓘ Lingunite | (Na,Ca)AlSi3O8 |
| Fe | Iron | |
| Fe | ⓘ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Fayalite-Forsterite Series | |
Other Regions, Features and Areas containing this locality
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References
Lindström, Maurits, Sturkell, Erik F. F., Törnberg, Roger, Ormouml;, Jens (1996) The marine impact crater at Lockne, central Sweden. GFF, 118 (4) 193-206 doi:10.1080/11035899609546255
Ormö, J., Sturkell, E.F.F., Törnberg, R. (1996) Magnetic model of the Lockne impact crater, central Sweden. GFF, 118. 100-101 doi:10.1080/11035899609546421
STURKELL, ERIK F. F. (1998) Resurge morphology of the marine Lockne impact crater,
Jämtland, central Sweden. Geological Magazine, 135 (1) 121-127 doi:10.1017/s0016756897007875
STURKELL, Erik, ORMÖ, Jens, NÕLVAK, Jaak, WALLIN, Åsa (2000) Distant ejecta from the Lockne marine-target impact crater, Sweden. Meteoritics & Planetary Science, 35 (5) 929-936 doi:10.1111/j.1945-5100.2000.tb01482.x
DALWIGK, Ilka von, ORMÖ, Jens (2001) Formation of resurge gullies at impacts at sea: The Lockne crater, Sweden. Meteoritics & Planetary Science, 36 (3) 359-369 doi:10.1111/j.1945-5100.2001.tb01879.x
Lindström, M., Shuvalov, V., Ivanov, B. (2005) Lockne crater as a result of marine-target oblique impact. Planetary and Space Science, 53 (8) 803-815 doi:10.1016/j.pss.2005.02.005
Frisk, Åsa M., Ormö, Jens (2007) Facies distribution of post-impact sediments in the Ordovician Lockne and Tvären impact craters: Indications for unique impact-generated environments. Meteoritics & Planetary Science, 42 (11) 1971-1984 doi:10.1111/j.1945-5100.2007.tb00554.x
Alwmark, Carl, Schmitz, Birger (2007) Extraterrestrial chromite in the resurge deposits of the early Late Ordovician Lockne crater, central Sweden. Earth and Planetary Science Letters, 253 (1) 291-303 doi:10.1016/j.epsl.2006.10.034
Sturkell, Erik, Ormö, Jens, Lepinette, Alain (2013) Early modification stage (preresurge) sediment mobilization in the Lockne concentric, marine-target crater, Sweden. Meteoritics & Planetary Science, 48 (3) 321-338 doi:10.1111/maps.12058
Alwmark, C.; Alwmark‐Holm, S.; Ormö, J.; Sturkell, E. (2014) Shocked quartz grains from the Målingen structure, Sweden—Evidence for a twin crater of the Lockne impact structure. Meteoritics & Planetary Science, 49 (6). 1076-1082 doi:10.1111/maps.12314
Agarwal, Amar, Kontny, Agnes, Greiling, Reinhard O. (2015) Relationships among magnetic fabrics, microfractures and shock pressures at an impact crater: A case study from Lockne crater, Sweden. Journal of Applied Geophysics, 114. 232-243 doi:10.1016/j.jappgeo.2015.01.010
Lockne crater, Östersund, Jämtland County, Sweden