Work

Detrital zircon geochronology and whole-rock geochemistry of the 1.8–1.7 Ga Xiong’er volcanic-sedimentary succession in the southern North China craton and their implications for basin evolution

Year: 2024

Type: article

Abstract: The Xiong’er volcanic-sedimentary succession in the southern North China Craton (NCC) documents crucial data regarding the geological evolution of the supercontinent Columbia (Nuna). Previous researches largely focused on the volcanic rocks in the Xiong’er succession, while the paleo-tectonic significance of its sedimentary rocks has not been explored. LA-ICP-MS detrital zircon U-Pb dating and whole-rock geochemistry of the interlayered sedimentary units within the succession are conducted to ascertain the provenance and tectonic driver of the basin infill. New chronological constraint suggests the deposition of the succession persisted until ca. 1710 Ma, temporally aligned with the initial deposition of the overlying Ruyang Group. Normalized rare earth elements (REE) and classification diagrams indicate derivation predominantly from felsic sources with supplementary input from mafic sources. Detrital zircon U-Pb ages indicate a major 2.5 Ga provenance from the proximal latest Archean and Paleoproterozoic metamorphic complexes and a subordinate ca. 2.3 ∼ 1.8 Ga provenance from adjacent regions. Notably, an elevated ca. 1.8 ∼ 1.7 Ga detrital zircon peak in the uppermost section of the succession implies contributions from coeval granites and volcanogenic rocks. Integrating these observations with the stratigraphic progression, the Xiong’er succession is interpreted as a magma-rich syn -rift basin infill and we hypothesize the existence of a “breakup unconformity” separating the syn -rift Xiong’er Group from the overlying post-rift Ruyang Group.

Source: Precambrian Research

DOI: 10.1016/j.precamres.2024.107608

Authors: Fengbo Sun, Yuting Wu, Taiping Zhao, Deshun Zheng, Peng Peng

Institutions: Henan Polytechnic University, Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, Institute of Geology and Geophysics

Language: English

Topic: Geological and Geochemical Analysis

Subfield: Geophysics

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,380

Funder: National Natural Science Foundation of China