Tectono-magmatic evolution of the younger Gardar southern rift, South Greenland /
- 出版日期：2013.
- 出版者：Geological Survey of Denmark and Greenland, Danish Ministry of Climate, Energy and Building,
- 页数：124 pages :
- 出版地：Copenhagen :
- 第一责任说明：Brian G.J. Upton.
- 尺寸：30 cm
- 分类号：a254
- ISBN：9788778713667(pbk.) :
MARC全文
02h0061463 20150326133120.0 150316s2013 dk ab frb |000|||eng | 9788778713667(pbk.) : CNY300.00 AU@ eng rda AU@ NTE ; UKMGB ; MUU ; OCLCF ; IUL ; YDXCP ; CNNGL n-gl--- a254 Upton, Brian G. J., author. Tectono-magmatic evolution of the younger Gardar southern rift, South Greenland / Brian G.J. Upton. Copenhagen : Geological Survey of Denmark and Greenland, Danish Ministry of Climate, Energy and Building, 2013. 124 pages : color illustrations, color maps ; 30 cm atext btxt 2rdacontent aunmediated bn 2rdamedia avolume bnc 2rdacarrier Geological Survey of Denmark and Greenland bulletin, 1604-8156 ; 29 Includes bibliographical references (pages 116-124) Introduction -- The older gian dyke complex, Tuttutooq -- The younger giant dyke complex -- Central complexes and late dykes -- Emplacement mechanisms and tectonics -- Evolution of the magmatic system of the younger Gardar southern rift. The Mesoproterozoic Gardar province in South Greenland comprises some of the Earth's best exposed and best preserved alkaline intrusive complexes. The province was formed by continental rifting and associated magmatism during a long interval (1300-1140 Ma). Of the two parallel Gardar rift zones, the southern zone underwent a separate evolution during the younger Gardar period (1185-1140 Ma). This bulletin describes this mega-volcanic system with rifting, magma generation, emplacement and crystallisation in giant dykes and central intrusions. The primitive basic magmas evolved by fractionation into extreme compositions, and some intrusions, in particular the famous Ilimaussaq complex, contain accumulations of rare and exotic elements such as zirconium, niobium, rare earths and uranium. Many rocks show spectacular features of igneous layering and accumulation of crystals which recount the processes in the magma chambers. A modern analogue to the Gardar system is the Kenya Rift. The author, Brian Upton, has worked with the Gardar province for more than 50 years. His knowledge is based on extensive field work, laboratory studies and comparative studies in other alkaline provinces. Rifts (Geology) ; Geology, Structural ; Magmatism Greenland. ; Greenland. ; Greenland. Geological Survey of Denmark. Geological Survey of Denmark and Greenland bulletin ; 29. aCN b010001 010001 P 253.94 G29 v29 ; rCNY300.00 gljx1503