Pb, Nd, and Sr isotope mapping of Grenville-Age crustal provinces in Rodinia

C. D. Wareham; R. J. Pankhurst; R. J. Thomas; B. C. Storey; G. H. Grantham; J. Jacobs; B. M. Eglington

doi:10.1086/516051

Pb, Nd, and Sr isotope mapping of Grenville-Age crustal provinces in Rodinia

C. D. Wareham, R. J. Pankhurst, R. J. Thomas, B. C. Storey, G. H. Grantham, J. Jacobs, B. M. Eglington

British Antarctic Survey

Research output: Contribution to journal › Article › peer-review

103 Citations (Scopus)

Abstract

New Pb, Nd, and Sr isotope data are presented for geochemically similar, ~1.1-1.2 Ga, granitoids and tonalitic-granitic orthogneisses from Antarctica, southern Africa, and the Falkland Islands and adjoining plateau, areas originally within the supercontinents of Rodinia and Gondwana. These data support contentions for the presence of a Mesoproterozoic (~1.2 Ga) destructive plate margin running from Namaqua-Natal (southern Africa), through the displaced microplates of the Falkland Plateau and Falkland Islands, the Haag Nunatak crustal block (West Antarctica) and into western Dronning Maud Land (East Antarctica). The bulk of these granitoids represent juvenile Mesoproterozoic additions to the crust, except for in parts of East Antarctica (i.e., the Sverdrupfjella) where older (Paleoproterozoic or Archean) crust was involved in granitoid generation. Our isotope data permit plate reconstructions in which southern Africa, East Antarctica, and the Falkland Islands and plateau were adjacent within Rodinia.

Original language	English
Pages (from-to)	647-659
Number of pages	13
Journal	Journal of Geology
Volume	106
Issue number	6
DOIs	https://doi.org/10.1086/516051
Publication status	Published - 1998
Externally published	Yes

ASJC Scopus subject areas

Geology

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title = "Pb, Nd, and Sr isotope mapping of Grenville-Age crustal provinces in Rodinia",

abstract = "New Pb, Nd, and Sr isotope data are presented for geochemically similar, ~1.1-1.2 Ga, granitoids and tonalitic-granitic orthogneisses from Antarctica, southern Africa, and the Falkland Islands and adjoining plateau, areas originally within the supercontinents of Rodinia and Gondwana. These data support contentions for the presence of a Mesoproterozoic (~1.2 Ga) destructive plate margin running from Namaqua-Natal (southern Africa), through the displaced microplates of the Falkland Plateau and Falkland Islands, the Haag Nunatak crustal block (West Antarctica) and into western Dronning Maud Land (East Antarctica). The bulk of these granitoids represent juvenile Mesoproterozoic additions to the crust, except for in parts of East Antarctica (i.e., the Sverdrupfjella) where older (Paleoproterozoic or Archean) crust was involved in granitoid generation. Our isotope data permit plate reconstructions in which southern Africa, East Antarctica, and the Falkland Islands and plateau were adjacent within Rodinia.",

author = "Wareham, {C. D.} and Pankhurst, {R. J.} and Thomas, {R. J.} and Storey, {B. C.} and Grantham, {G. H.} and J. Jacobs and Eglington, {B. M.}",

year = "1998",

doi = "10.1086/516051",

language = "English",

volume = "106",

pages = "647--659",

journal = "Journal of Geology",

issn = "0022-1376",

publisher = "University of Chicago",

number = "6",

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TY - JOUR

T1 - Pb, Nd, and Sr isotope mapping of Grenville-Age crustal provinces in Rodinia

AU - Wareham, C. D.

AU - Pankhurst, R. J.

AU - Thomas, R. J.

AU - Storey, B. C.

AU - Grantham, G. H.

AU - Jacobs, J.

AU - Eglington, B. M.

PY - 1998

Y1 - 1998

N2 - New Pb, Nd, and Sr isotope data are presented for geochemically similar, ~1.1-1.2 Ga, granitoids and tonalitic-granitic orthogneisses from Antarctica, southern Africa, and the Falkland Islands and adjoining plateau, areas originally within the supercontinents of Rodinia and Gondwana. These data support contentions for the presence of a Mesoproterozoic (~1.2 Ga) destructive plate margin running from Namaqua-Natal (southern Africa), through the displaced microplates of the Falkland Plateau and Falkland Islands, the Haag Nunatak crustal block (West Antarctica) and into western Dronning Maud Land (East Antarctica). The bulk of these granitoids represent juvenile Mesoproterozoic additions to the crust, except for in parts of East Antarctica (i.e., the Sverdrupfjella) where older (Paleoproterozoic or Archean) crust was involved in granitoid generation. Our isotope data permit plate reconstructions in which southern Africa, East Antarctica, and the Falkland Islands and plateau were adjacent within Rodinia.

AB - New Pb, Nd, and Sr isotope data are presented for geochemically similar, ~1.1-1.2 Ga, granitoids and tonalitic-granitic orthogneisses from Antarctica, southern Africa, and the Falkland Islands and adjoining plateau, areas originally within the supercontinents of Rodinia and Gondwana. These data support contentions for the presence of a Mesoproterozoic (~1.2 Ga) destructive plate margin running from Namaqua-Natal (southern Africa), through the displaced microplates of the Falkland Plateau and Falkland Islands, the Haag Nunatak crustal block (West Antarctica) and into western Dronning Maud Land (East Antarctica). The bulk of these granitoids represent juvenile Mesoproterozoic additions to the crust, except for in parts of East Antarctica (i.e., the Sverdrupfjella) where older (Paleoproterozoic or Archean) crust was involved in granitoid generation. Our isotope data permit plate reconstructions in which southern Africa, East Antarctica, and the Falkland Islands and plateau were adjacent within Rodinia.

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DO - 10.1086/516051

M3 - Article

AN - SCOPUS:0032450452

SN - 0022-1376

VL - 106

SP - 647

EP - 659

JO - Journal of Geology

JF - Journal of Geology

IS - 6

ER -

Pb, Nd, and Sr isotope mapping of Grenville-Age crustal provinces in Rodinia

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