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5 results for “Detrital zircon geochronology”
Episodic evolution of a protracted convergent margin revealed by detrital zircon geochronology in the Greater Caucasus
<p class="MsoNormal">Convergent margins play a fundamental role in the construction and modification of Earth's lithosphere and are characterized by poorly understood episodic processes that occur during the progression from subduction to terminal collision. On the northern margin of the active Arabia-Eurasia collision zone, the Greater Caucasus Mountains provide an opportunity to study a protracted convergent margin that spanned most of the Phanerozoic and culminated in Cenozoic continental collision. However, the main episodes of lithosphere formation and deformation along this margin remain enigmatic. Here, we use detrital zircon U-Pb geochronology from Paleozoic and Mesozoic (meta)sedimentary rocks in the Greater Caucasus, along with select zircon U-Pb and Hf isotopic data from coeval igneous rocks, to link key magmatic and depositional episodes along the Caucasus convergent margin. Devonian to Early Carboniferous rocks were deposited prior to Late Carboniferous accretion of the Greater Caucasus crystalline core onto the Laurussian margin. Permian to Triassic rocks document a period of northward subduction and forearc deposition south of a continental margin volcanic arc in the Northern Caucasus and Scythian Platform. Jurassic rocks record the opening of the Caucasus Basin as a back-arc rift during southward migration of the arc front into the Lesser Caucasus. Cretaceous rocks have few Jurassic-Cretaceous zircons, indicating a period of relative magmatic quiescence and minimal exhumation within this basin. Late Cenozoic closure of the Caucasus Basin juxtaposed the Lesser Caucasus arc to the south against the crystalline core of the Greater Caucasus to the north and led to the formation of a hypothesized terminal suture. We expect this suture to be within ~20 kilometers of the southern range front of the Greater Caucasus because all analyzed rocks to the north exhibit a provenance affinity with the crystalline core of the Greater Caucasus.</p>
Episodic evolution of a protracted convergent margin revealed by detrital zircon geochronology in the Greater Caucasus
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Disentangle the Sediment Mixing from Geochemical Proxies and Detrital Zircon Geochronology
<p>Supplementary Data of the Manuscript titled 'Disentangle the Sediment Mixing from Geochemical Proxies and Detrital Zircon Geochronology '</p>
Data from: Holocene Sediment Provenance Evolution in the Northern South China Sea Inferred from Detrital Zircon Geochronology
<p>The supporting information here provides the AMS <sup>14</sup>C geochronological data of core sediments (Table S1) and LA-ICP-SF-MS U-Pb results of detrital zircon grains (Table S2) within this study.</p>
Late Permian-Early Triassic intracontinental tectonic inversion in the Junggar Basin, NW China: New insights from detrital zircon geochronology and seismic reflection data
<p>The detrital zircon U-Pb isotope data from the Mahu sag is included in the Supporting Information.</p>
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