The age, petrogenesis and emplacement of the dalmatian granite, h.u. sverdrupfjella, dronning maud land, antarctica

G. H. Grantham; A. B. Moyes; D. R. Hunter

doi:10.1017/S0954102091000238

The age, petrogenesis and emplacement of the dalmatian granite, h.u. sverdrupfjella, dronning maud land, antarctica

G. H. Grantham, A. B. Moyes, D. R. Hunter

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

32 Citations (Scopus)

Abstract

The ~470 Ma Dalmatian Granite forms sheet–like bodies intruded discordantly into orthogneisses, paragneisses and calcareous rocks belonging to the ~1000 Ma Jutulrora, Sveabreen and Fuglefjellet formations respectively. The Dalmatian Granite is muscovite + biotite bearing. Two varieties are recognized, one that is magnetite–bearing and another that is characterized by tourmaline nodules. At some localities, development of the tourmaline-bearing variety is spatially associated with the presence of carbonates. Physical conditions of emplacement for the Dalmatian Granite are estimated to be approximately 700°C and 6kbar with pH₂0 = P_load*. The emplacement of the granite is considered to have occurred syntectonically during D₃approximately 470 Ma ago. The granites are therefore similar in age to Pan African age granites in Mozambique as well as Ross Orogeny age granites in the Transantarctic Mountains.

Original language	English
Pages (from-to)	197-204
Number of pages	8
Journal	Antarctic Science
Volume	3
Issue number	2
DOIs	https://doi.org/10.1017/S0954102091000238
Publication status	Published - Jun 1991
Externally published	Yes

Keywords

Pan African
Ross Orogeny
granite
syn-tectonic

ASJC Scopus subject areas

Oceanography
Ecology, Evolution, Behavior and Systematics
Geology

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title = "The age, petrogenesis and emplacement of the dalmatian granite, h.u. sverdrupfjella, dronning maud land, antarctica",

abstract = "The ~470 Ma Dalmatian Granite forms sheet–like bodies intruded discordantly into orthogneisses, paragneisses and calcareous rocks belonging to the ~1000 Ma Jutulrora, Sveabreen and Fuglefjellet formations respectively. The Dalmatian Granite is muscovite + biotite bearing. Two varieties are recognized, one that is magnetite–bearing and another that is characterized by tourmaline nodules. At some localities, development of the tourmaline-bearing variety is spatially associated with the presence of carbonates. Physical conditions of emplacement for the Dalmatian Granite are estimated to be approximately 700°C and 6kbar with pH20 = Pload*. The emplacement of the granite is considered to have occurred syntectonically during D3approximately 470 Ma ago. The granites are therefore similar in age to Pan African age granites in Mozambique as well as Ross Orogeny age granites in the Transantarctic Mountains.",

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AU - Moyes, A. B.

AU - Hunter, D. R.

PY - 1991/6

Y1 - 1991/6

N2 - The ~470 Ma Dalmatian Granite forms sheet–like bodies intruded discordantly into orthogneisses, paragneisses and calcareous rocks belonging to the ~1000 Ma Jutulrora, Sveabreen and Fuglefjellet formations respectively. The Dalmatian Granite is muscovite + biotite bearing. Two varieties are recognized, one that is magnetite–bearing and another that is characterized by tourmaline nodules. At some localities, development of the tourmaline-bearing variety is spatially associated with the presence of carbonates. Physical conditions of emplacement for the Dalmatian Granite are estimated to be approximately 700°C and 6kbar with pH20 = Pload*. The emplacement of the granite is considered to have occurred syntectonically during D3approximately 470 Ma ago. The granites are therefore similar in age to Pan African age granites in Mozambique as well as Ross Orogeny age granites in the Transantarctic Mountains.

AB - The ~470 Ma Dalmatian Granite forms sheet–like bodies intruded discordantly into orthogneisses, paragneisses and calcareous rocks belonging to the ~1000 Ma Jutulrora, Sveabreen and Fuglefjellet formations respectively. The Dalmatian Granite is muscovite + biotite bearing. Two varieties are recognized, one that is magnetite–bearing and another that is characterized by tourmaline nodules. At some localities, development of the tourmaline-bearing variety is spatially associated with the presence of carbonates. Physical conditions of emplacement for the Dalmatian Granite are estimated to be approximately 700°C and 6kbar with pH20 = Pload*. The emplacement of the granite is considered to have occurred syntectonically during D3approximately 470 Ma ago. The granites are therefore similar in age to Pan African age granites in Mozambique as well as Ross Orogeny age granites in the Transantarctic Mountains.

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The age, petrogenesis and emplacement of the dalmatian granite, h.u. sverdrupfjella, dronning maud land, antarctica

Abstract

Keywords

ASJC Scopus subject areas

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