“Dallasite”的意思、由来-开放百科全书

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Dallasite

释义

References

{{about|a type of rock found in British Columbia|the definition of someone from Dallas, Texas|Dallas, Texas}}Dallasite is a breccia made of subequant to rectangular or distinctly elongate, curvilinear shards that represent the spalled rims of pillow basalt (see: Hyaloclastite). This material is commonly partly altered to chlorite, epidote, quartz and carbonate, for which the local term 'dallasite' has been coined.^[1] The stone dallasite is named after Dallas Road, Victoria, British Columbia. It is considered the unofficial stone of British Columbia's capital city.^[2] Dallasite is found in Triassic volcanic rocks of Vancouver Island and is considered the third most important gem material in British Columbia.^[3]

References

1. ^[https://www.researchgate.net/publication/266289964_High-Mg_Lavas_in_the_Karmutsen_Flood_Basalts_Northern_Vancouver_Island_NTS_092L_Stratigraphic_Setting_and_Metallogenic_Significance]{{citation|title=High-Mg Lavas in the Karmutsen Flood Basalts, Northern Vancouver Island (NTS 092L): Stratigraphic Setting and Metallogenic Significance|date=2008|author=Nixon, G.T., Larocque, J., Pals, A., Styan, J., Greene, A.R., and Scoates, J.S.}}
2. ^{{citation | author = Hudson Rick| title = A Field Guide to Gold, Gemstone and Mineral Sites of British Columbia. Volume 2. Orca Book Publishers.| date = 1999}}
3. ^{{citation | author = VanLandingham, Sam L.| title = Geology of world gem deposits| date = 1985}}

4 : Rocks|Gemstones|Geology of British Columbia|Breccias

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