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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04682naa a2200493 4500 | |
| 001 | oai:DiVA.org:ri-2709 | |
| 003 | SwePub | |
| 008 | 160907s2013 | |||||||||||000 ||eng| | |
| 009 | oai:gup.ub.gu.se/181035 | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-27092 URI |
| 024 | 7 | a https://doi.org/10.1080/00206814.2013.7807032 DOI |
| 024 | 7 | a https://gup.ub.gu.se/publication/1810352 URI |
| 040 | a (SwePub)rid (SwePub)gu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Cornell, David H.,d 1948u Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences4 aut0 (Swepub:gu)xcorda |
| 245 | 1 0 | a The Plat Sjambok Anorthosite and its tonalitic country rocks :b mesoproterozoic pre-tectonic intrusions in the Kaaien Terrane, Namaqua-Natal Province, southern Africa |
| 264 | c 2013-03-22 | |
| 264 | 1 | b Informa UK Limited,c 2013 |
| 338 | a print2 rdacarrier | |
| 520 | a The Plat Sjambok Anorthosite crops out near Prieska Copper Mines in the Namaqua-Natal Province of southern Africa. It is a massif-type anorthosite, previously regarded as a late-tectonic intrusion and part of the ca. 1100 Ma bimodal Keimoes Suite. Our new ion probe U-Pb zircon data show that the Plat Sjambok massif intruded at 1259 ± 5 Ma, before the 1220 Ma Namaqua collision events and is thus approximately 150 million years older than the Keimoes Suite. Despite the proximity to Prieska Mines, the anorthosite is located in the Kaaien Terrane close to the Brakbos Fault, which is the boundary with the Areachap Terrane in which Prieska Mines is situated. We dated the Nelspoortjie Tonalite, the main country rock of the Plat Sjambok Anorthosite, by laser ablation ICPMS at 1273 ± 13 Ma. Both intrusions thus originated concurrently with the 1286-1241 Ma volcanic rocks of the Areachap Group, which developed in a subduction-related arc setting, prior to its collision with the Kaaien Terrane and Kaapvaal Craton. Metamorphic zircon rims in the Plat Sjambok Anorthosite give an age of 1122 ± 7 Ma, a time that corresponds to a quiet period in the Areachap Terrane. We propose a tectonic model in which formation of the Nelspoortjie Tonalite and Plat Sjambok Anorthosite was driven by intrusions from the mantle into a back-arc related tensional environment within the Kaaien Terrane, possibly situated above an Archaean crustal tongue. This led to heating in a thickened crustal setting in which the tonalite originated as a partial melt of amphibolite. The anorthosite then formed as a mixture of mantle-derived gabbro and Archaean crustal rocks, which explains the 2100-2600 Ma zircon-Hf crustal residence ages and the Sm-Nd trend towards an old crustal source. The anorthosite and its country rocks were only juxtaposed with the Prieska Copper Mining District by late-tectonic uplift and transpressional movements on the Brakbos Fault towards the end of the Namaqua tectogenesis. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Materialteknikx Annan materialteknik0 (SwePub)205992 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Materials Engineeringx Other Materials Engineering0 (SwePub)205992 hsv//eng |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskap0 (SwePub)1052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciences0 (SwePub)1052 hsv//eng |
| 653 | a anorthosite | |
| 653 | a Archaean crustal tongue | |
| 653 | a Hf isotopes | |
| 653 | a Mesoproterozoic | |
| 653 | a Namaqua-Natal | |
| 653 | a Prieska Copper Mines | |
| 653 | a tonalite | |
| 653 | a zircon U-Pb dating | |
| 653 | a Namaqua–Natal; Mesoproterozoic; anorthosite; tonalite; zircon U-Pb dating; Hf isotopes; Archaean crustal tongue; Prieska Copper Mines | |
| 700 | 1 | a Brander, Linusu Gothenburg University,Göteborgs universitet,RISE,CBI Betonginstitutet AB,University of Gothenburg, Sweden,Institutionen för geovetenskaper,Department of Earth Sciences4 aut0 (Swepub:gu)xbrali |
| 700 | 1 | a Zack, Thomas,d 1968u Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences4 aut0 (Swepub:gu)xzackt |
| 700 | 1 | a Kristoffersen, Magnusu University of Oslo, Norway4 aut |
| 710 | 2 | a Göteborgs universitetb Institutionen för geovetenskaper4 org |
| 773 | 0 | t International Geology Reviewd : Informa UK Limitedg 55:12, s. 1471-1489q 55:12<1471-1489x 0020-6814x 1938-2839 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-2709 |
| 856 | 4 8 | u https://doi.org/10.1080/00206814.2013.780703 |
| 856 | 4 8 | u https://gup.ub.gu.se/publication/181035 |
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