The neoarchean and palaeoproterozoic metamorphic evolution of the Limpopo Belt s Central Zone in southern Africa [Elektronische Ressource] : new insights from petrological investigations on amphibolite to granulite facies rocks / vorgelegt von Leo Jakob Millonig
139 pages

Découvre YouScribe en t'inscrivant gratuitement

Je m'inscris

The neoarchean and palaeoproterozoic metamorphic evolution of the Limpopo Belt's Central Zone in southern Africa [Elektronische Ressource] : new insights from petrological investigations on amphibolite to granulite facies rocks / vorgelegt von Leo Jakob Millonig

Découvre YouScribe en t'inscrivant gratuitement

Je m'inscris
Obtenez un accès à la bibliothèque pour le consulter en ligne
En savoir plus
139 pages
Obtenez un accès à la bibliothèque pour le consulter en ligne
En savoir plus

Description

The Neoarchean and Palaeoproterozoic metamorphic evolution of the Limpopo Belt’s Central Zone in southern Africa New insights from petrological investigations on amphibolite to granulite facies rocks Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades der Bayerischen Julius-Maximilians-Universität Würzburg vorgelegt von Leo Jakob Millonig aus Würzburg Würzburg 2009 Eingereicht am: 1. Gutachter: 2. Gutachter: der Dissertation 1. Prüfer: 2. Prüfer: der mündlichen Prüfung Tag der mündlichen Prüfung: Doktorurkunde ausgehändigt am: In memory of Prof. Dr. Harald Millonig Contents TThhee NNeeooaarrcchheeaann aanndd PPaallaaeeoopprrootteerroozzooiicc mmeettaammoorrpphhiicc eevvoolluuttiioonn ooff tthhee LLiimmppooppoo BBeelltt’’ss CCeennttrraall TThhee NNeeooaarrcchheeaann aanndd PPaallaaeeoopprrootteerroozzooiicc mmeettaammoorrpphhiicc eevvoolluuttiioonn ooff tthhee LLiimmppooppoo BBeelltt’’ss CCeennttrraall ZZZZoooonnnneeee iiiinnnn ssssoooouuuutttthhhheeeerrrrnnnn AAAAffffrrrriiiiccccaaaa.........................................................................................................................................................................................................................................................................................................................................

Informations

Publié par
Publié le 01 janvier 2009
Nombre de lectures 44
Poids de l'ouvrage 25 Mo

Extrait

The Neoarchean and Palaeoproterozoic metamorphic evolution
of the Limpopo Belt’s Central Zone in southern Africa
New insights from petrological investigations on amphibolite to granulite
facies rocks


Dissertation zur Erlangung
des naturwissenschaftlichen Doktorgrades
der Bayerischen Julius-Maximilians-Universität Würzburg




vorgelegt von

Leo Jakob Millonig
aus
Würzburg




Würzburg 2009



















Eingereicht am:

1. Gutachter:
2. Gutachter:
der Dissertation

1. Prüfer:
2. Prüfer:
der mündlichen Prüfung

Tag der mündlichen Prüfung:

Doktorurkunde ausgehändigt am:













In memory of
Prof. Dr. Harald Millonig Contents

TThhee NNeeooaarrcchheeaann aanndd PPaallaaeeoopprrootteerroozzooiicc mmeettaammoorrpphhiicc eevvoolluuttiioonn ooff tthhee LLiimmppooppoo BBeelltt’’ss CCeennttrraall TThhee NNeeooaarrcchheeaann aanndd PPaallaaeeoopprrootteerroozzooiicc mmeettaammoorrpphhiicc eevvoolluuttiioonn ooff tthhee LLiimmppooppoo BBeelltt’’ss CCeennttrraall
ZZZZoooonnnneeee iiiinnnn ssssoooouuuutttthhhheeeerrrrnnnn AAAAffffrrrriiiiccccaaaa................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 3333
1 Abstract ....................................................................................................................................... 3
2 Zusammenfassung ........................................................................................................................ 4
3 Introduction................................................................................................................................. 6
4444 GGGGeeeeoooollllooooggggiiiiccccaaaallll sssseeeettttttttiiiinnnngggg ooooffff tttthhhheeee LLLLiiiimmmmppppooooppppoooo BBBBeeeelllltttt........................................................................................................................................................................................................................................................................................................................................................................ 7777
5 Analytical techniques...................................................................................................................11
Mahalapye Complex................................................................................................................... 12
6 Geological overview.....................................................................................................................12
7777 PPPPeeeettttrrrrooooggggrrrraaaapppphhhhyyyy aaaannnndddd MMMMiiiinnnneeeerrrraaaallll CCCChhhheeeemmmmiiiissssttttrrrryyyy....................................................................................................................................................................................................................................................................................................................................................................................11114444
7.1 Si-undersaturated sillimanite-garnet-cordierite gneiss (sample Ma3a).............................................. 15
7.2 Si-undersaturated sillimanite-garnet-cordierite gneiss (sample Ma3c).............................................. 19
7.3 Garnet-biotite-plagioclase gneiss (samples Ma1h/Ma1i).................................................................. 24
8 P-T pseudosections......................................................................................................................28
8.1 Sillimanite-garnet-cordierite gneiss (sample Ma3a) ......................................................................... 28
8.2 Sillimanite-garnet-cordierite gneiss (sample Ma3c) ......................................................................... 33
8.3 Garnet-biotite-plagioclase gneiss (samples Ma1h/Ma1i).................................................................. 38
9 Summary: Metamorphic evolution of the Mahalapye Complex......................................................40
Phikwe Complex ........................................................................................................................ 41
11110000 GGGGeeeeoooollllooooggggiiiiccccaaaallll oooovvvveeeerrrrvvvviiiieeeewwww....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................44441111
11 Petrography and Mineral Chemistry.............................................................................................44
11.1 Garnet-biotite amphibolite (sample SP1)........................................................................................ 44
11.2 Garnet-pyroxene amphibolite (sample SP7a) .................................................................................. 46
11.3 Garnet-biotite-sillimanite-cordierite gneiss (sample SP8) ................................................................ 48
11.4 Garnet-plagioclase-biotite gneiss (sample SP9c) .............................................................................. 51
11.5 Garnet-cordierite-orthoamphibole fels (samples SP9d/SP9e)........................................................... 53
12 P-T pseudosections......................................................................................................................57
12.1 Garnet-biotite-sillimanite-cordierite gneiss (sample SP8) ................................................................ 57
12.2 Garnet-cordierite-orthoamphibole fels (sample SP9d)..................................................................... 62
12.3 Garnet-pyroxene amphibolite (sample SP7a) .................................................................................. 67
13 Geothermobarometry ..................................................................................................................70
13.1 Garnet-biotite amphibolite (sample SP1)........................................................................................ 71
13.2 Garnet-pyroxene amphibolite (sample SP7a) .................................................................................. 72
13.3 Garnet-biotite-sillimanite-cordierite gneiss (sample SP8) ................................................................ 74
13.4 Garnet-plagioclase-biotite gneiss (sample SP9c) .............................................................................. 74
13.5 Garnet-cordierite-orthoamphibole fels (samples SP9d/SP9e)........................................................... 75
13.6 Geothermobarometric results from the Phikwe Complex................................................................ 76
11114444 SSSSuuuummmmmmmmaaaarrrryyyy:::: MMMMeeeettttaaaammmmoooorrrrpppphhhhiiiicccc eeeevvvvoooolllluuuuttttiiiioooonnnn ooooffff tttthhhheeee PPPPhhhhiiiikkkkwwwweeee CCCCoooommmmpppplllleeeexxxx............................................................................................................................................................................................................................................77779999 *Bulai Pluton area (Beit Bridge Complex) ................................................................................... 80
1155 AAbbssttrraacctt ............................................................................................................................................................................................................................................................................8800 1155 AAbbssttrraacctt ............................................................................................................................................................................................................................................................................8800
16 Introduction................................................................................................................................80
16.1 The Bulai Pluton - pre-, syn- and post-intrusive features................................................................. 81
17 Petrography, Bulk Rock and Mineral Chemistry ...........................................................................85
17.1 Analytical techniques...................................................................................................................... 85
17.2 Sample Description ............................................................................................

  • Univers Univers
  • Ebooks Ebooks
  • Livres audio Livres audio
  • Presse Presse
  • Podcasts Podcasts
  • BD BD
  • Documents Documents