Abstract The study of sedimentary mélanges holds pivotal importance in understanding orogenic processes and unveiling geodynamic mechanisms. In this study, we present findings on zircon U‐Pb isotopes and whole‐rock elemental data concerning the recently uncovered Zongzhuo Formation sedimentary mélanges within the Dingri area. Field observations reveal the predominant composition of the Zongzhuo Formation, characterized by a matrix of sandstone‐mudstone mixed with sand‐conglomerates within native blocks exhibiting soft sediment deformation. Moreover, exotic blocks originating from littoral–neritic seas display evidence of landslide deformation. Our study identifies the depositional environment of the Zongzhuo Formation in Dingri as a slope turbidite fan, with its provenance traced back to the passive continental margin. Notably, this contrasts with the Zongzhuo Formation found in the Jiangzi–Langkazi area. Based on existing data, we conclude that the Zongzhuo Formation in the Dingri area was influenced by the Dingri–Gamba fault and emerged within a fault basin of the passive continental margin due to Neo‐Tethys oceanic subduction during the Late Cretaceous period. Its provenance can be attributed to the littoral–neritic sea of the northern Tethys Himalaya region. This study holds significant implications for understanding the tectonic evolution of Tethys Himalaya and for reevaluating the activity of the Dingri–Gamba fault, as it controls the active deposition of the Zongzhuo Formation.

10.1111/1755-6724.15170

Cite

Citations (0)

Quaternary sediment in the Yichang area: Implications for the formation of the Three Gorges of the Yangtze River

Geomorphology (2006)

Fang Xiang Lidong Zhu Chengshan Wang Xixi Zhao Hongde Chen

Three gorges

Alluvial fan

Yangtze river

Deposition

10.1016/j.geomorph.2006.03.027

Cite

Citations (54)

CLAY MINERALS INDICATORS OF PALEOCLIMATE CHANGES OF CHENGDU PLAIN SINCE 4 kaBP

Marine Geology & Quaternary Geology (2007)

Lidong Zhu

By the analyses of the X-ray diffraction,contents of clay minerals of the sediments from Jinsha site IT6814 of Chengdu are measured.The results show that the main types of the clay minerals are illite,chlorite,illite-montmorillonite and kaolinite.Analyses and study on these clay mineral types and contents show that Chengdu plain can be divided into five phases.Climate in Chengdu plain went from temperate-cool and a little dry to warm and moist.The temperature decreased abruptly since 2 500 aBP.And the influence of the ancient activity on the clay mineral is low.So the ingredient and content of clay mineral may be taken as the climatic indicator.

Illite

Paleoclimatology

Source

Cite

Citations (2)

The Origin and Geochemical Characteristics of Maokou Formation Silicalites in the Eastern Sichuan Basin

Acta Geological Sinica (2010)

Lidong Zhu

Silicalites are distributed widely in the Middle Permian Maokou Formation in the eastern Sichuan basin.Detailed observation in the field and the contents of major elements,REE and isotope of silicalites suggest that the Maokou Formation silicalites were hydrothermal origin and were deposited under platform-basin facies environments.The silicalites are characterized by relatively high contents (80.09%～97.91%) of SiO2 and enrichment of Fe and Mn,with a ratio of Al/(Al+Fe+Mn) being 0.30 and average total REE of 8.72×10-6.δCe values range from 0.39 to 0.81 with a negative anomly.δEu of 0.35～5.85,changes from no obvious anomaly to positive anomaly.δ30Si is from 0.2‰ to 1.2‰ that is very similar to that of hydrothermal quartz.δ18O calculation also indicates that the paleotemperatures of the sea water was 34～89℃ during the formation of the silicalites.The formation of hydrothermal silicalites is closely related to volcanic activities and faulting,the mixed fluid of seawater and magmatic fluid was heated and dissolved a large voluminous of SiO2,and other minerals,which erupted along faults in the form of spring and then deposited in adjacent areas.

Isotopes of strontium

Source

Cite

Citations (10)

Late Paleozoic-Mesozoic subduction and accretionary processes of the Tethys in southeastern Gangdese: record of temporal and spatial transitions from the Paleo-Tethys to Neo-Tethys

Episodes (2024)

Yao Zhong Wenguang Yang Lidong Zhu Hongliang Zhang Long Xie

Tethys Ocean

10.18814/epiiugs/2024/024019

Cite

Citations (1)