Topic
Gondwana
About: Gondwana is a research topic. Over the lifetime, 6078 publications have been published within this topic receiving 263050 citations. The topic is also known as: Gondwanaland.
Papers published on a yearly basis
Papers
More filters
Book•
01 Feb 1994
TL;DR: In this paper, the authors studied the structure and state of the Central Andean Crustal Structure of the Southern Central Andes (CASC) in the Andean Arc of Northern Chile (17.5 -22 S).
Abstract: Structure and State of the Lithosphere.- The Lithospheric Structure of the Central Andes (20 - 26 S) as Inferred from Interpretation of Regional Gravity.- Variation in the Crustal Structure of the Southern Central Andes Deduced from Seismic Refraction Investigations.- Crustal High Conductivity Zones in the Southern Central Andes.- Geothermal Structure of the Central Andean Crust - Implications for Heat Transport and Rheology.- Large- and Fine-Scale Geochemical Variations Along the Andean Arc of Northern Chile (17.5 -22 S).- Partial Melting in the Lower Crust: New Constraints on Crustal Contamination Processes in the Central Andes.- State of In Situ Stress in Northern Chile and in Northwestern Argentina.- Large Events, Seismic Gaps, and Stress Diffusion in Central Chile.- Geological Evolution.- Tectonic Development of the North Chilean Andes in Relation to Plate Convergence and Magmatism Since the Jurassic.- K-Ar and Fission Track Mineral Age Determinations of Igneous Rocks Related to Multiple Magmatic Arc Systems Along the 23 S Latitude of Chile and NW Argentina.- Geothermal and Tectonic Evolution of the Eastern Cordillera and the Subandean Ranges of Southern Bolivia.- Sedimentary and Structural Evolution of the Salar de Atacama Depression.- The Purilactis Group of Northern Chile: Boundary Between Arc and Backarc from Late Cretaceous to Eocene.- Early Jurassic to Early Cretaceous Magmatism in the Coastal Cordillera and the Central Depression of North Chile.- Sediment Accumulation and Subsidence History in the Mesozoic Marginal Basin of Northern Chile.- Jurassic Cretaceous Palaeogeographic Evolution of the Chilean Andes at 23 -24 S Latitude and 34 -35 S Latitude: A Comparative Analysis.- The Southern Andes Between 39 and 44 S Latitude: The Geological Signature of a Transpressive Tectonic Regime Related to a Magmatic Arc.- Terranes of Southern Gondwanaland and Their Control in the Andean Structure (30 -33 S Latitude).- Some Isotopic and Geochemical Constraints on the Origin and Evolution of the Central Andean Basement (19 -24 S).- The Late Carboniferous to Triassic Volcanic Belt in Northern Chile.- Geodynamic Evolution of the Early Palaeozoic Continental Margin of Gondwana in the Southern Central Andes of Northwestern Argentina and Northern Chile.- The Nitrate Deposits of Chile.- Petrochemical Factors Governing the Metallogeny of the Bolivian Tin Belt.- Maps of the Central Andean Segment Between 20 and 26 S.- Comments on the Geological and Geophysical Maps.- Enclosure.- 1 Geological Map.- 2 Bouguer Anomaly and Epicenters.- 3 Residual Gravity Anomaly (each at the scale 1:1 000 000 covering the area 20 -26 latitude and 63 -71 30'W longitude).
83 citations
TL;DR: The Permian System of eastern Australia provides a unique record of this transition along a high-latitude, open marine shelf as discussed by the authors, and the record also spans temperate to polar palaeolatitudes, providing an opportunity to examine environmental changes along a latitudinal transect.
83 citations
TL;DR: Pb zircon data from five igneous suites confirm previous studies that demonstrated widespread Pan-African magmatism in the Granulite Terrain of southern India as mentioned in this paper.
83 citations
TL;DR: In this paper, high-pressure granulites were found as blocks within the Paleozoic sedimentary rocks of the North Lhasa terrane, which is the northern boundary of the Indian continent.
82 citations
TL;DR: In this article, geothermobarometric, radiogenic isotopic and thermochronologic data are used to track the influence of an ancient continental margin (Western Province) on development of an adjacent Carboniferous-Cretaceous magmatic arc (Outboard median batholith) in Fiordland, New Zealand.
Abstract: [1] Geothermobarometric, radiogenic isotopic and thermochronologic data are used to track the influence of an ancient continental margin (Western Province) on development of an adjacent Carboniferous-Cretaceous magmatic arc (Outboard Median Batholith) in Fiordland, New Zealand. The data show a record of complicated Mesozoic Gondwana margin growth. Paragneiss within the Outboard Median Batholith is of Carboniferous to Jurassic age and records burial to middle crustal depths in Late Jurassic–Early Cretaceous during subduction-related plutonism and arc thickening. In contrast, Western Province metasedimentary rocks in the area of study immediately west of the Outboard Median Batholith are Late Cambrian–Early Ordovician in age, recrystallized at the amphibolite facies in the Late Devonian–Early Carboniferous and exhibit no evidence for Mesozoic textural or isotopic reequilibration. A phase of deformation, between 128 and 116 Ma deformed, exhumed, and cooled the Outboard Median Batholith to greenschist facies temperatures, while large parts of the Western Province underwent ≥9 kbar metamorphic conditions. Zircon grains from Mesozoic inboard plutons are isotopically more evolved (ɛHf(t) = +2.3 to +4.0) than those in the Outboard Median Batholith (ɛHf(t) = +9.4 to +11.1). The contrasting zircon Hf isotope ratios, absence of S-type plutons or Proterozoic–Early Paleozoic inherited zircon, and the apparent absence of Early Paleozoic metasedimentary rocks indicates that the Outboard Median Batholith is unlikely to be underlain by the Western Province continental lithosphere. The new data are consistent with the Outboard Median Batholith representing an allochthonous (although not necessarily exotic) arc that was juxtaposed onto the Gondwana continental margin along the intervening Grebe Mylonite Zone.
82 citations