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Record #155782:
- #155782
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MARC recordRapid maturation and stabilisation of middle Archaean continental crust: the Akia terrane, southern West Greenland / Adam A. Garde, Clark R.L. Friend, Allen P. Nutman, Mogens Marker.
| Title: | Rapid maturation and stabilisation of middle Archaean continental crust: the Akia terrane, southern West Greenland / Adam A. Garde, Clark R.L. Friend, Allen P. Nutman, Mogens Marker. |
| Author(s): | Garde, Adam A. Friend, Clark R. L. Nutman, Allen P. Marker, Mogens. |
| Date: | 2000. |
| In: | Geological Society of Denmark. Bulletin. (2000.), Vol. 47(1) (2000) |
| Abstract: | New ion probe U-Pb zircon analyses of 12 samples of grey orthogneiss, granite and post-kinematic diorite, supported by Sm-Nd isotope geochemistry, document middle Archaean accretional history and provide new evidence about location of northern boundary. Zircon populations and inherited zircon show that magnetic accretion of new continental crust, dominated by intrusion of tonalite sheets occurred between 3050 and 3000 Ma, around and within c. 3220 Ma continental core. Metamorphic maximum was contemporary with upright, angular folds of Paakitsoq deformation phase. Relative chronology is well established, but zircons yielded indistinguishable ages of emplacement, showing that crustal growth occurred in several short-lived events. |
| Notes: | Geological Society of Denmark. Bulletin. Vol. 47(1) :1-27 (2000). |
| Keywords: | 54.027 -- Isotope analysis. 551.1/.4 -- Geology. 551.24 -- Geotectonics. B -- Geology and soil sciences. (*3) -- Arctic regions. (*38) -- Greenland. (*384.66) -- Nuuk/Godthab. |
| SPRI record no.: | 155782 |
LDR 01800naa#a2200000#a#4500 001 SPRI-155782 005 20240419011033.0 007 ta 008 240419s2000####xx#ab#|##|###|0||#0|eng#d 035 ## ‡aSPRI-155782 040 ## ‡aUkCU-P‡beng‡eaacr 245 00 ‡aRapid maturation and stabilisation of middle Archaean continental crust :‡bthe Akia terrane, southern West Greenland /‡cAdam A. Garde, Clark R.L. Friend, Allen P. Nutman, Mogens Marker. 260 ## ‡a[S.l.] :‡b[s.n.],‡c2000. 300 ## ‡ap. 1-27 :‡bdiags., tables, maps. 500 ## ‡aGeological Society of Denmark. Bulletin. Vol. 47(1) :1-27 (2000). 520 3# ‡aNew ion probe U-Pb zircon analyses of 12 samples of grey orthogneiss, granite and post-kinematic diorite, supported by Sm-Nd isotope geochemistry, document middle Archaean accretional history and provide new evidence about location of northern boundary. Zircon populations and inherited zircon show that magnetic accretion of new continental crust, dominated by intrusion of tonalite sheets occurred between 3050 and 3000 Ma, around and within c. 3220 Ma continental core. Metamorphic maximum was contemporary with upright, angular folds of Paakitsoq deformation phase. Relative chronology is well established, but zircons yielded indistinguishable ages of emplacement, showing that crustal growth occurred in several short-lived events. 650 07 ‡a54.027 -- Isotope analysis.‡2udc 650 07 ‡a551.1/.4 -- Geology.‡2udc 650 07 ‡a551.24 -- Geotectonics.‡2udc 650 07 ‡aB -- Geology and soil sciences.‡2local 651 #7 ‡a(*3) -- Arctic regions.‡2udc 651 #7 ‡a(*38) -- Greenland.‡2udc 651 #7 ‡a(*384.66) -- Nuuk/Godthab.‡2udc 700 1# ‡aGarde, Adam A. 700 1# ‡aFriend, Clark R. L. 700 1# ‡aNutman, Allen P. 700 1# ‡aMarker, Mogens. 773 0# ‡7nnas ‡tGeological Society of Denmark. Bulletin. ‡gVol. 47(1) (2000) ‡wSPRI-73282 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240419