Geochronological constraints on the Late Proterozoic to Cambrian crustal evolution of eastern Dronning Maud Land, East Antarctica: a synthesis of SHRIMP U-Pb age and Nd model age data

2008 ◽  
Vol 308 (1) ◽  
pp. 21-67 ◽  
Author(s):  
Kazuyuki Shiraishi ◽  
Daniel J. Dunkley ◽  
Tomokazu Hokada ◽  
C. Mark Fanning ◽  
Hiroo Kagami ◽  
...  
Keyword(s):  
East Antarctica ◽  
Crustal Evolution ◽  
Late Proterozoic ◽  
Dronning Maud Land ◽  
Geochronological Constraints ◽  
Nd Model Age

scholarly journals Grenville-age continental arc magmatism and crustal evolution in central Dronning Maud Land (East Antarctica): Zircon geochronological and Hf–O isotopic evidence

2020 ◽  
Vol 82 ◽  
pp. 108-127 ◽  
Author(s):  
Cheng-Cheng Wang ◽  
Joachim Jacobs ◽  
Marlina A. Elburg ◽  
Andreas Läufer ◽  
Robert J. Thomas ◽  
...  
Keyword(s):  
East Antarctica ◽  
Arc Magmatism ◽  
Crustal Evolution ◽  
Isotopic Evidence ◽  
Continental Arc ◽  
Dronning Maud Land ◽  
Continental Arc Magmatism

Geology of Gjelsvikfjella and western Mühlig-Hofmannfjella, Dronning Maud Land, east Antarctica

1990 ◽  
Vol 8 (2) ◽  
pp. 99-126 ◽  
Author(s):  
Y. Ohta ◽  
B. O. Tørudbakken ◽  
K. Shiraishi
Keyword(s):  
East Antarctica ◽  
Dronning Maud Land

Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica)

1997 ◽  
Vol 9 (1) ◽  
pp. 43-45 ◽  
Author(s):  
U. Wand ◽  
G. Schwarz ◽  
E. Brüggemann ◽  
K. Bräuer
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Water Column ◽  
Water Body ◽  
East Antarctica ◽  
Bacterial Sulphate Reduction ◽  
Chemical Stratification ◽  
Dronning Maud Land ◽  
Physical And Chemical ◽  
Vertical Gradients

Lake Untersee is the largest freshwater lake in the interior of East Antarctica. It is a perennially ice-covered, max. 169 m deep, ultra-oligotrophic lake. In contrast to earlier studies, we found clear evidence for physical and chemical stratification in the summer of 1991–92. However, the stratification was restricted to a trough, c. 500 m wide and up to 105 m deep, in the south-western part of the lake. There, the water body was distinctly stratified as indicated by sharp vertical gradients of temperature, pH, dissolved oxygen, and electrical conductivity. The water column was anoxic below 80 m. The chemical stratification is also indicated by changes of ionic ratios. Moreover, there was some evidence for methanogenesis and bacterial sulphate reduction in Lake Untersee.

scholarly journals U-PB AND SM-ND GEOCHRONOLOGICAL CONSTRAINTS ON THE CRUSTAL EVOLUTION AND BASEMENT ARCHITECTURE OF CEARÁ STATE, NW BORBOREMA PROVINCE, NE BRAZIL: IMPLICATIONS FOR THE EXISTENCE OF THE PALEOPROTEROZOIC SUPERCONTINENT "ATLANTICA"

2000 ◽  
Vol 30 (1) ◽  
pp. 102-106 ◽  
Author(s):  
ALLEN HUTCHESON FETTER ◽  
WILLIAM RANDALL VAN SCHMUS ◽  
TICIANO JOSÉ SARAIVA DOS SANTOS ◽  
JOSÉ ARAUJO NOGUEIRA NETO ◽  
MICHEL HENRI ARTHAUD
Keyword(s):  
Crustal Evolution ◽  
Borborema Province ◽  
Geochronological Constraints

Newly found Tonian metamorphism in Akebono Rock, eastern Dronning Maud Land, East Antarctica

2021 ◽  
Author(s):  
Sotaro Baba ◽  
Kenji Horie ◽  
Tomokazu Hokada ◽  
Mami Takehara ◽  
Atsushi Kamei ◽  
...  
Keyword(s):  
East Antarctica ◽  
Dronning Maud Land

Tectono-magmatic evolution of the Karoo and Kerguelen plumes and their impact onto magmatism of the East Antarctica

2021 ◽  
Author(s):  
Nadezda Sushchevskaya ◽  
German Leitchenkov ◽  
Boris Belyatsky
Keyword(s):  
Melting Process ◽  
Oceanic Lithosphere ◽  
East Antarctica ◽  
Igneous Provinces ◽  
Igneous Province ◽  
Dronning Maud Land ◽  
Tectonic Development ◽  
Characteristic Features ◽  
Intrusive Activity ◽  
Lambert Glacier

<p>The Mesozoic Karoo-Maud and Kerguelen plumes had a significant influence on Gondwana and the oceanic lithosphere. Jurassic magmatism, formed under the influence of a huge Karoo plume at 184–178 Ma ago, covered large areas of the Dronning Maud Land in East Antarctica. Later, 130 – 0 m.y. ago, under the influence of the Kerguelen plume, magmatism formed in the area of the Lambert glacier, and the Gaussberg volcano (Quaternary time) appeared, located on the coast opposite the Kerguelen archipelago. We assume that the Karoo mantle plume initiated the formation of a “mega-apophyses” from the main plume manifestation area within the Karoo province in the southeastern African continet (ca. 2000 km in diameter). These mega-apophyses are represented by the Ferrar Igneous Province (ca. 3000 km long area of intrusive activity along the Transantarctic Mountains) and a supposed igneous province (ca. 1500 km long) covering the East Antarctic coast between the Lazarev and Cosmonauts Seas. Based on petrological and geochemical studies, the characteristic features of magmas of the Karoo, Dronning Maud Land, and Ferrar igneous provinces have been determined, which indicate that for all magmas associated with Karoo and Kerguelen plumes, the main source of melt enrichment is a mantle source with characteristics of the EM-II component (most typically for magmas of the Ferrar Province). It reflects the properties of an enriched, fluid-rich, ancient continental mantle, metasomatized at the early stages of the tectonic development of the region and involved in the melting process. A rarer admixture of the ancient lithospheric component (EM-I, with <sup>206</sup>Pb/<sup>204</sup>Pb = 16.5 and <sup>143</sup>Nd/<sup>144</sup>Nd = 0.5122) was revealed in both plumes. The existence of mantle plumes in the Southern Hemisphere and their long-term development had a significant impact on the structure and evolution of the East Antarctica.</p>

scholarly journals Genesis of Ferropotassic A-Type Granitoids of Mühlig-Hofmannfjella, Central Dronning Maud Land, East Antarctica

Antarctica ◽  
2006 ◽  
pp. 45-54 ◽  
Author(s):  
Mervin J. D’Souza ◽  
A. V. Keshava Prasad ◽  
Rasik Ravindra
Keyword(s):  
East Antarctica ◽  
Dronning Maud Land

Late Neoproterozoic–Cambrian magmatism in Dronning Maud Land (East Antarctica): U–Pb zircon geochronology, isotope geochemistry and implications for Gondwana assembly

2020 ◽  
Vol 350 ◽  
pp. 105880
Author(s):  
Cheng-Cheng Wang ◽  
Joachim Jacobs ◽  
Marlina A. Elburg ◽  
Andreas Läufer ◽  
Synnøve Elvevold
Keyword(s):  
Isotope Geochemistry ◽  
East Antarctica ◽  
Zircon Geochronology ◽  
Dronning Maud Land ◽  
Late Neoproterozoic
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