Results 51 to 60 of about 1,245 (182)

Miocene paleogeography of northwest Colombia: A review of the sedimentary and magmatic evolution of the Amagá Basin a century after Grosse’s work

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales, 2023
In 1918, the geologist Emile Grosse was commissioned to conduct geological studies in the Amagá Basin, Antioquia, Colombia. In 1923, Grosse finished a comprehensive cartographic work that became the cornerstone for the geology of the northwest (NW ...
Sebastian Zapata, Juan Sebastián Jaramillo-Ríos, Gladys Eliana Botello, Astrid Siachoque, Laura Cristina Calderon-Día, Agustín Cardona, Christy Till, Victor Valencia   +7 more
doaj   +1 more source

A zircon petrochronologic view on granitoids and continental evolution

Earth and Planetary Science Letters, 2020
Abstract Temporal trends in granitoid chemistry and thermometry constrain major global changes in magmatism, tectonism or crustal thickness in the continents. Our study relies on zircon geochronology and trace element geochemistry on four new detrital rocks (two modern sediments and two Archean metasedimentary rocks) and a global compilation of ...
C. Balica, M.N. Ducea, G.E. Gehrels, J. Kirk, R.D. Roban, P. Luffi, J.B. Chapman, A. Triantafyllou, J. Guo, A.M. Stoica, J. Ruiz, I. Balintoni, L. Profeta, D. Hoffman, L. Petrescu   +14 more
openaire   +3 more sources

Petrology and geochronology of rutile

, 2017
Rutile (TiO2) is an important accessory mineral that, when present, offers a rich source of information about the rock units in which it is incorporated. It occurs in a variety of specific microstructural settings, contains significant amounts of several
Kooijman, E., Zack, Thomas,, Kooijman, Ellen,   +2 more
core   +1 more source

The In Vacuo Release of Ar from Minerals: 4—Polymineralic Samples

Geosciences
The in vacuo release of Ar and other noble gases is well understood for single minerals. However, natural samples, even those seemingly pure under the optical microscope, mostly consist of mm-to-µm scale intergrowths of different minerals.
Igor M. Villa
doaj   +1 more source

Paleoproterozoic Reworking of Archean Crust and Extreme Back‐Arc Metamorphism in the Enigmatic Southern Trans‐Hudson Orogen

Geophysical Research Letters
The crustal evolution of the southernmost ∼2000–1800 Ma Trans‐Hudson orogen (THO) is enigmatic due to burial by Phanerozoic sediments. We provide new insights through petrochronologic analysis of a paragneiss drill core sample.
Ian W. Hillenbrand, Amy K. Gilmer, Michael L. Williams, A. Kate Souders, Michael J. Jercinovic, Heather A. Lowers, Jorge A. Vazquez   +6 more
doaj   +1 more source

Building the Andean Crust at ∼35°S: Arc Geochemistry Reveals Cretaceous Thinning and Rapid Neogene Thickening

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Quantification of the timing and mechanisms of crustal thickening in Cordilleran orogenic hinterlands remains challenging. We address this in the Andes using whole‐rock geochemistry and zircon petrochronology from a >70 Myr volcanic record in the Tinguiririca valley of Chile (∼35° ${}^{\circ}$S), which captures a pivotal transition from ...
Chance B. Ronemus, Caden J. Howlett, Peter G. DeCelles, Barbara Carrapa, Andrés Echaurren, Matías Barrionuevo, Jesse G. Mosolf, Michelle L. Foley, Mihai N. Ducea   +8 more
wiley   +1 more source

High-P metamorphism in the Mesoproterozoic: Petrochronological insights from the Grenville Province

Precambrian Research, 2023
In the Grenville Province, high-P rocks that are discontinuously exposed along the margin of the allochthonous belt preserve the record of deep crustal processes and are an essential puzzle piece to understanding Mesoproterozoic geodynamics. The Manicouagan Imbricate zone (MIZ) is one of the three high-P domains from the Grenville Province.
Lotout, Caroline, Indares, Aphrodite, Vervoort, Jeffrey, Deloule, Etienne   +3 more
openaire   +2 more sources

Variations in the P‐T‐t of Deformation in a Crustal‐Scale Shear Zone in Metagranite

Geochemistry, Geophysics, Geosystems, 2020
Deformation in crustal‐scale shear zones occurs over a range of pressure‐temperature‐time (P‐T‐t) conditions, both because they may be vertically extensive structures that simultaneously affect material from the lower crust to the surface, and because ...
T. K. Cawood, J. P. Platt
doaj   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, Volume 38, Issue 4, Page 266-277, August 2026.
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, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Petrochronology of Accessory Minerals in relation to Metamorphism and Fluid-Flow across the Albany-Fraser Orogen and Eucla Basement, Western Australia [PDF]

, 2019
Petrochronology of uranium-bearing accessory minerals (zircon, monazite, rutile and titanite) across the Albany-Fraser Orogen and Eucla basement was undertaken to provide insight into transient metamorphism and fluid-flow events and their link to ...
Chard, Julian Alexander
core   +1 more source