The Mineral Evolution database is currently under development.
The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.
Locality Name:Långdal Mine, Boliden, Skellefte Mining District, Skellefteå, Västerbotten County, SwedenOldest recorded age at locality: 2500Youngest recorded age at locality: 541mindat Locality ID: 18571mindat URL:http://www.mindat.org/loc-18571.htmlTectonic Settings: Total number of sublocalities beneath "Långdal Mine, Boliden, Skellefte Mining District, Skellefteå, Västerbotten County, Sweden": 0Total number of bottom-level sublocalities: 0Latitude: 64°49'32"NLongitude: 20°13'41"EDecimal Degree (lat, lon): 64.825555555556,20.228055555556
A
This mineral is Anthropogenic.
G
This mineral is directly dated.
B
This mineral is reported as having this age.
Y
This mineral is using an age reported as an element mineralization period.
O
This mineral is using an age calculated from all data at the locality.
R
The age displayed for this mineral originates from a different, non-child locality.
P
The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.
This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.Elements at this locality, including sub-localities: AgAlAsCaCuFeHKMgOPbSSbSiTeWZnElements from minerals reported directly at this locality: Ag Al As Ca Cu Fe H K Mg O Pb S Sb Si Te W Zn Structural Groups for minerals in this locality:
U-Pb zircon dating of volcanic rocks and early orogenic intrusives in the Los, Bergslagen, and Skellefte districts yields ages of 1.87-1.90 Ga (Welin et al, 1980, Åberg et al. 1984; Åberg and Strömberg 1984; Wilson et al. 1985; Welin 1987; Claesson and Lundqvist 1990). Dating ofvo1canic rocks in central and southern Finland have also yielded U-Pb zircon ages of 1.87-1.90 Ga (Ah o 1979; Helovuori 1979; Patchett and Kouvo 1986; Welin 1987). This indicates that deposition of vo1canic rocks occurred over a time interval of about 30 M yrs in the central part of the Baltic Shield.
Age is suspected to be approximately 1870 Ma, during which an extensional period of tectonic activity weakened the mantle and provided access for heavier materials to ascend upwards
Peperitic contact with supracrustal lithologies in its area suggest that the age of the Bjurvattnet sample should be considered as the minimum age for the deepest part of the volcanic pile.