Results 51 to 60 of about 21,553 (228)

Sedimentary Provenance Changes Constrain the Eocene Initial Uplift of the Central Pamir, NW Tibetan Plateau

Frontiers in Earth Science, 2021
The Pamir Plateau region of the Northwestern Tibetan Plateau forms a prominent tectonic salient, separating the Tajik and Tarim basins. However, the topographic evolution of the Pamir Plateau remains elusive, despite the key role of this region played in
Ping Wang, Ping Wang, Dongliang Liu, Dongliang Liu, Haibing Li, Haibing Li, Marie-Luce Chevalier, Marie-Luce Chevalier, Yadong Wang, Jiawei Pan, Jiawei Pan, Yong Zheng, Yong Zheng, Chenglong Ge, Chenglong Ge, Mingkun Bai, Mingkun Bai, Shiguang Wang   +17 more
doaj   +1 more source

Zircon dissolution in a ductile shear zone, Monte Rosa granite gneiss, northern Italy [PDF]

, 2008
The sizes, distributions and shapes of zircon grains within variably deformed granite gneiss from the western Alps have been studied. Zircon shows numerous indicators of a metamorphic response in both the host gneiss and a 5 cm wide continuous ductile ...
Dal Piaz, Engi, Ewing, Hanchar, Hunziker, J. C. Martin, Keller, Kretz, Liati, Moller, Pawlig, Rubin, T. J. Dempster, Varva, Z. K. Shipton   +14 more
core   +1 more source

Metamictization and chemical durability of detrital zircon

American Mineralogist, 2001
We have investigated the effect that metamictization has on the weathering of zircon in detrital continental sediments and tropical soils of the Amazon basin, Brazil. The degree of radiation damage in the near-surface region of the zircon grains was determined by Raman microprobe. In each of the four series investigated (i.e., sediment, podzol, topsoil,
Balan, Etienne, Neuville, Daniel-R., Trocellier, Patrick, Fritsch, Emmanuel, Muller, Jean-Pierre, Calas, Georges   +5 more
openaire   +2 more sources

ReMoDe – Recursive modality detection in distributions of ordinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The detection of the number of modes in distributions of ordinal data is relevant for applied researchers across disciplines, from uncovering polarization to detecting incidence groups in clinical symptom scales. Yet, established modality detection methods are either purely descriptive or not developed for ordinal data.
Madlen Hoffstadt, Lourens Waldorp, Javier Garcia‐Bernardo, Han van der Maas   +3 more
wiley   +1 more source

Testing the fidelity of zircon as a provenance indicator in fluvial‐fan successions: An example from the Palaeogene Colton Formation, Central Utah, USA

The Depositional Record
The stratigraphic, spatial and temporal variability of detrital zircon age populations in continental sedimentary successions is a critical tool in understanding palaeodrainage networks and how these systems distributed detritus within sedimentary basins.
Davide Carraro, Sean P. Gaynor, Dario Ventra, Alexey Ulyanov, Andrea Moscariello   +4 more
doaj   +1 more source

Cadomian/Pan-African consolidation of the Iberian Massif assessed by its detrital and inherited zircon populations: is the ~610Ma age peak a persistent Cadomian magmatic inheritance or the key to unravel its Pan-African basement?

Geologica Acta, 2022
This work assessed the age distribution of Cadomian/Pan-African orogenic events (550-590 and 605-790Ma, respectively) in several zones of Iberian Massif by means of detrital and inherited zircon analysis compilation. Detrital zircon age spectra show that
Martim Chichorro, Ana Rita Solá, Telmo M. Bento dos Santos, João Lains Amaral, Lourenço Crispim   +4 more
doaj   +1 more source

From source to sink in central Gondwana: Exhumation of the Precambrian basement rocks of Tanzania and sediment accumulation in the adjacent Congo basin [PDF]

, 2016
Apatite fission track (AFT) and (U-Th)/He (AHe) thermochronometry data are reported and used to unravel the exhumation history of crystalline basement rocks from the elevated (>1000 m above sea level) but low-relief Tanzanian Craton.
Brown, Roderick, de Wit, Maarten J., Kasanzu, Charles Happe, Linol, Bastien, Persano, Cristina, Stuart, Finlay M.   +5 more
core   +1 more source

Palaeowinds and depositional conditions from Holocene loess in Sweden and Finland

Boreas, EarlyView.
The nature of deglacial and Holocene wind regimes in Fennoscandia is debated, as is the degree to which wind‐blown loess deposits exist in the region. Loess deposits in Fennoscandia are often relatively thin, discontinuous and less well‐sorted than typical loess, and questions remain over the degree of their post‐depositional reworking and the impact ...
Calum J. Edward, Thomas Stevens, Anu Kaakinen, Jukka‐Pekka Palmu, Juha‐Pekka Lunkka, Ramona Schneider, Bjarne Almqvist   +6 more
wiley   +1 more source

Recycling of Paleoproterozoic and Neoproterozoic crust recorded in Lower Paleozoic metasandstones of the Northern Gemericum (Western Carpathians, Slovakia): Evidence from detrital zircons

Geologica Carpathica, 2019
U–Pb (SHRIMP) detrital zircon ages from the Early Paleozoic meta-sedimentary rocks of the Northern Gemericum Unit (the Smrečinka Formation) were used to characterize their provenance.
Vozárová Anna, Rodionov Nickolay, Šarinová Katarína   +2 more
doaj   +1 more source

A review of U-Pb detrital zircon systematics from Cambrian- Lower Devonian rocks of the Moroccan Meseta

Geogaceta, 2022
U-Pb geochronological analysis of detrital zircon grains is a powerful tool to decipher the pre-Mesozoic paleogeography. In this work, we present a sediment provenance study based on a compilation of 41 Cambrian-Early Devonian siliciclastic samples from
Cristina Accotto, David Martínez Poyatos, Antonio Azor, Antonio Jabaloy-Sánchez   +3 more
doaj   +1 more source