Results 91 to 100 of about 1,938 (228)
Sedimentology, EarlyView.ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte +4 more
wiley +1 more source
Using Zircon Morphology to Understand Metasomatic Fluid Alteration During the Big Sky Orogeny
, 2017 Metasomatism is a metamorphic process that changes the bulk composition and morphology of a lithology. By understanding the differences between the protolith and altered rock, specifics about the composition of the fluid and its effects on the host rock ...
Curtis, Kelly
core +1 more source
, 2022 A granitic sample from the Danish island of Christiansø in the Ertholmene island group north of Bornholm is described petrographically and geochemically, and dated using U-Pb in zircon and titanite.
Stokholm, Mikael +3 more
core +1 more source
Ductile Extrusion Triggered by Continental Collision in NE Brazil
Terra Nova, EarlyView.ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser +6 more
wiley +1 more source
Geochemistry, Geophysics, GeosystemsIt is intriguing whether and how crust‐mantle interaction would proceed in continental subduction zones. Here, we report zircon U‐Pb ages and Hf isotopes, major and trace elements, and Sr‐Nd‐Mo isotopes for Late Paleozoic mafic igneous rocks from the ...
Qing‐Chen Yang +4 more
doaj +1 more source
, 2016 The understanding of zircon crystallization, and of the Ti-in-zircon thermometer, has been enhanced by Ti concentration measurements of zircon from a small, concentrically zoned pluton in south-eastern Australia, the Boggy Plain zoned pluton (BPZP ...
Wyborn, D, Williams, Ian, Ickert, Ryan
core +1 more source
Neoproterozoic Anatexis of 2.9 Ga Old Granitoids in the Goiás-Crixás Archean Block, Central Brazil: Evidence From New SHRIMP U-Pb Data and Sm-Nd Isotopes [PDF]
Geologia USP. Série Científica, 2003 The first SHRIMP U-Pb ages for granitoid rocks from the southern part of the Goiás-Crixás Archean Block (Caiçara andUvá complexes) are presented and discussed in combination with Sm-Nd isotopic data in order to elucidate the main aspectsof the geological
Márcio Martins Pimentel +5 more
doaj
Revista Mexicana de Ciencias GeológicasThe Acatlán Complex (AC) in southern Mexico is a critical lithodemic province for Paleozoic paleoreconstructions. It is mainly composed of low-grade volcano-sedimentary sequences, yet quantitative geothermobarometric data are scarce in the literature ...
Anthony Ramírez-Salazar +2 more
doaj +1 more source
Cadomian metabasites of the Eastern Pyrenees revisited
Geologica Acta, 2023 This study presents a new geochemical, petrological, and geochronological U-Pb dataset from Ediacaran metabasites and associated rocks of the Canigó and Cap de Creus massifs, Eastern Pyrenees. Metabasites are composed of calcic amphibole + plagioclase +
Núria Pujol-Solà +7 more
doaj
, 2009 In the southeastern part of the North Qaidam terrane, near Dulan, paragneiss hosts minor peridotite and UHP eclogite. Zircon geochronology and trace element geochemistry of three paragneiss samples (located within a ∼3 km transect) indicates that ...
Wooden, Joseph L. +3 more
core