Matches in SemOpenAlex for { <https://semopenalex.org/work/W4386829498> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W4386829498 abstract "Paleomagnetic records of middle Neoproterozoic (820-780 Ma) rocks display high amplitude directional variations that lead to large discrepancies in paleogeographic reconstructions. Hypotheses to explain these data include rapid true polar wander, a geomagnetic field geometry that deviates from a predominantly axial dipole field, a hyper-reversing field (> 10 reversals/Ma), and/or undiagnosed remagnetization. To test these hypotheses, we collected 1057 oriented cores over a 85 m stratigraphic succession in the Laoshanya Formation (Yangjiaping, Hunan, China). High precision U-Pb dating of two intercalated tuff layers constrain the age of the sediments between 809 and 804 Ma. Thermal demagnetization isolates three magnetization components residing in hematite which are not time-progressive but conflated throughout the section. All samples possess a north and downward directed component (in geographic coordinates) at temperatures up to 660°C that is ascribed to a Cretaceous overprint. Two components isolated above 660°C reveal distinct directional clusters: one is interpreted as a depositional remanence, while the other appears to be the result of a mid-Paleozoic (460-420 Ma) remagnetization, which is likely widespread throughout South China. The high-temperature directions are subtly dependent on lithology; microscopic and rock magnetic analyses identify multiple generations of hematite that vary in concentration and distinguish the magnetization components. A comparison with other middle Neoproterozoic paleomagnetic studies in the region indicates that the sudden changes in paleomagnetic directions, used elsewhere to support the rapid true polar wander hypothesis (ca. 805 Ma), are better explained by mixtures of primary and remagnetized components, and/or vertical axis rotations." @default.
- W4386829498 created "2023-09-19" @default.
- W4386829498 creator A5009704473 @default.
- W4386829498 creator A5031503613 @default.
- W4386829498 creator A5033923457 @default.
- W4386829498 creator A5036709175 @default.
- W4386829498 creator A5045179332 @default.
- W4386829498 creator A5051392952 @default.
- W4386829498 creator A5076892906 @default.
- W4386829498 creator A5077316743 @default.
- W4386829498 creator A5079740180 @default.
- W4386829498 creator A5091664546 @default.
- W4386829498 date "2023-09-18" @default.
- W4386829498 modified "2023-10-01" @default.
- W4386829498 title "Middle Neoproterozoic (Tonian) polar wander of South China: Paleomagnetism and ID-TIMS U-Pb geochronology of the Laoshanya Formation" @default.
- W4386829498 doi "https://doi.org/10.22541/essoar.169504475.59949183/v1" @default.
- W4386829498 hasPublicationYear "2023" @default.
- W4386829498 type Work @default.
- W4386829498 citedByCount "0" @default.
- W4386829498 crossrefType "posted-content" @default.
- W4386829498 hasAuthorship W4386829498A5009704473 @default.
- W4386829498 hasAuthorship W4386829498A5031503613 @default.
- W4386829498 hasAuthorship W4386829498A5033923457 @default.
- W4386829498 hasAuthorship W4386829498A5036709175 @default.
- W4386829498 hasAuthorship W4386829498A5045179332 @default.
- W4386829498 hasAuthorship W4386829498A5051392952 @default.
- W4386829498 hasAuthorship W4386829498A5076892906 @default.
- W4386829498 hasAuthorship W4386829498A5077316743 @default.
- W4386829498 hasAuthorship W4386829498A5079740180 @default.
- W4386829498 hasAuthorship W4386829498A5091664546 @default.
- W4386829498 hasConcept C109428209 @default.
- W4386829498 hasConcept C114749048 @default.
- W4386829498 hasConcept C115260700 @default.
- W4386829498 hasConcept C121332964 @default.
- W4386829498 hasConcept C12294951 @default.
- W4386829498 hasConcept C127313418 @default.
- W4386829498 hasConcept C13106087 @default.
- W4386829498 hasConcept C151730666 @default.
- W4386829498 hasConcept C155058782 @default.
- W4386829498 hasConcept C189479680 @default.
- W4386829498 hasConcept C199635899 @default.
- W4386829498 hasConcept C202746551 @default.
- W4386829498 hasConcept C2781121502 @default.
- W4386829498 hasConcept C2781148125 @default.
- W4386829498 hasConcept C32546565 @default.
- W4386829498 hasConcept C49015763 @default.
- W4386829498 hasConcept C505970983 @default.
- W4386829498 hasConcept C62520636 @default.
- W4386829498 hasConcept C77928131 @default.
- W4386829498 hasConceptScore W4386829498C109428209 @default.
- W4386829498 hasConceptScore W4386829498C114749048 @default.
- W4386829498 hasConceptScore W4386829498C115260700 @default.
- W4386829498 hasConceptScore W4386829498C121332964 @default.
- W4386829498 hasConceptScore W4386829498C12294951 @default.
- W4386829498 hasConceptScore W4386829498C127313418 @default.
- W4386829498 hasConceptScore W4386829498C13106087 @default.
- W4386829498 hasConceptScore W4386829498C151730666 @default.
- W4386829498 hasConceptScore W4386829498C155058782 @default.
- W4386829498 hasConceptScore W4386829498C189479680 @default.
- W4386829498 hasConceptScore W4386829498C199635899 @default.
- W4386829498 hasConceptScore W4386829498C202746551 @default.
- W4386829498 hasConceptScore W4386829498C2781121502 @default.
- W4386829498 hasConceptScore W4386829498C2781148125 @default.
- W4386829498 hasConceptScore W4386829498C32546565 @default.
- W4386829498 hasConceptScore W4386829498C49015763 @default.
- W4386829498 hasConceptScore W4386829498C505970983 @default.
- W4386829498 hasConceptScore W4386829498C62520636 @default.
- W4386829498 hasConceptScore W4386829498C77928131 @default.
- W4386829498 hasLocation W43868294981 @default.
- W4386829498 hasOpenAccess W4386829498 @default.
- W4386829498 hasPrimaryLocation W43868294981 @default.
- W4386829498 hasRelatedWork W2008947219 @default.
- W4386829498 hasRelatedWork W2009900653 @default.
- W4386829498 hasRelatedWork W2030407912 @default.
- W4386829498 hasRelatedWork W2051997415 @default.
- W4386829498 hasRelatedWork W2056229468 @default.
- W4386829498 hasRelatedWork W2072819303 @default.
- W4386829498 hasRelatedWork W2129228217 @default.
- W4386829498 hasRelatedWork W2345978047 @default.
- W4386829498 hasRelatedWork W4251503598 @default.
- W4386829498 hasRelatedWork W4381885084 @default.
- W4386829498 isParatext "false" @default.
- W4386829498 isRetracted "false" @default.
- W4386829498 workType "article" @default.