Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"anatectic"”.
-
LITHIUM ENRICHMENT IN ANATECTIC PEGMATITES: NEW INSIGHTS FROM THE THERMOMETAMORPHIC AUREOLE OF THE ADAMELLO BATHOLITH
… them from melting and influencing the local anatectic processes. Crd-bearig migmatites leucosomes are compositionally similar to anatectic melts obtained by phase equilibria modelling, connected to fluid-assisted melting and defined as unfractionated, while the leucosomes dominated by Kfs-Bt …
-
Mineral Equilibrium Constraints on the Feasibility of Diffusively-Fluxed Melting in the Continental Crust
… to the influx of water has been recognised in anatectic amphibolite-facies composite grey gneisses, metagreywackes and low-pressure metapelites, and has consequently been proposed as an alternative mechanism for granite generation and crustal differentiation. Water-fluxed melting is recognised …
-
Impact of accessory minerals on the distribution of trace elements in the continental crust: an integrated petrologic and phase equilibria modeling study of migmatites, The
… to assess the behavior of accessory minerals in anatectic melts: a natural migmatite study, and modeling of theoretical melts generated through migmatization of metasedimentary rocks. Detailed in situ textural and mineral chemical characterization of migmatitic paragneiss from the Larsemann …
-
The New York-Alabama Magnetic Lineament: its reflection character and relationship to the Grenville front
… profiles. The thick crust might be the locus of anatectic melting following Grenville collision. The emplacement of granitic or granodioritic magmas provides an explanation for the density, magnetic susceptibility, and difference in reflectivity of the wedge-shaped block. The New York - Alabama …
-
Mineralogical, chemical and isotopic diversity in plutonic rock suites from the Coastal Maine Magmatic Province:the role of source region heterogeneity, tectonic setting and magmatic processes
… minerals on the initial Pb isotopic signature of anatectic granites. Their initial Pb isotopic composition reflects (a) the age, type, modal distribution, and heterogeneity in the initial U and Th content of the accessory phase(s) present in the source, (b) variation in melt composition and …
-
Quantifying Crustal Assimilation in Historical to Recent (1329-2005) Lavas at Mt. Etna, Italy: Insights from Thermodynamic Modeling
… trends, 5% of wallrock was stoped and 12% of anatectic melt was assimilated; percentages are relative to the starting mass of the magma body. Based on these modeling outcomes, I propose that the post-1971 alkali enrichment signature is due to both crustal contamination and mantle …
-
Satellite Remote Sensing Investigations into Changing Ice-shelf Extents in the Eastern Weddell Sea Sector of Antarctica
… retreat or collapse, as observed at the Anatectic Peninsula. However, further research is needed into the what affect warming might have on the large-scale atmospheric processes governing changes to the surface winds and related sea-ice concentration anomalies, so that better predictions …
-
Geologic and petrologic evidence for granulite facies partial melting in the Garies-Platbakkies supracrustal gneiss belt, Namaqualand metamorphic complex, South Africa
… emplaced in the succession. A wide variety of anatectic granites crop out as sills, dykes and pods varying in size between a few metres and a few hundred metres. These bodies commonly truncate pre-existing foliations. The metamorphosed supracrustal succession contains gneissic equivalents of …
-
EVOLUTION OF THE EASTERN ALPS FROM THE PALEOZOIC ONWARD: CONSTRAINTS AND INSIGHTS FROM THE (ULTRA)BASIC ECLOGITIC COMPLEX OF MILCHENKAR ÖTZTAL-STUBAI COMPLEX (EASTERN ALPS, TYROL, AUSTRIA)
… event in the OSC pre-dating the widespread anatectic plutonism of Ordovician age. This would be consistent with a protracted active margin scenario for the Proto-Alpine Cadomian terranes (e.g., von Raumer et al., 2013) in those times, also supported by subduction-related magmatism and …
-
The geochemistry of the Atlanta Lobe of the Idaho Batholith in the western United States, Cordillera
… mid-Proterozoic T6M. They are modelled as anatectic melts at the base of a thinned, isotopically distinct region of a trace element enriched lower crust similar to the source of the Cretaceous granitoids to leave a mafic granulitic residue without garnet leading to distinctly higher Y and …