Premium
A New Zircon U–Pb Age of 107.15 Ma for the Dongshan Formation, Boli Basin, Northeast China
Author(s) -
ZHANG Sheng,
FANG Shi,
SHAO Hongjun,
WANG Silin,
ZHAO Yun,
PING Shuaifei
Publication year - 2020
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14521
Subject(s) - china , christian ministry , beijing , chinese academy of sciences , zircon , geography , geochemistry , geology , archaeology , political science , law
Many studies have focused on the Cretaceous evolution of NE China, including the 973 Scientific Exploration Well Work program, which completed two drill holes in this area. The Cretaceous Basin Group of eastern NE China is highly altered, so the evolution, controlling factors and interpretation of the Early Cretaceous Dasanjiang Basin are controversial, and fundamental aspects of the rocks are poorly understood. The Boli Basin is the largest Cretaceous basin within NE China, but the temporal and spatial extent of Mesozoic strata within this basin, especially the Dongshan Formation, are not wellknown. Gu (1982) assigned the Dongshan Formation to the Late Jurassic or Late Jurassic–Early Cretaceous, based on paleontological evidence. Zheng et al. (1983) also used paleontological evidence to constrain its age to the Early Cretaceous (125–113 Ma). Ren et al. (2005) and Li et al. (2006) inferred an age of 107.1–101.7 Ma, based on biostratigraphy, paleomagnetic data and sequence stratigraphy. These indirect and incompatible age estimates for the Dongshan Formation have yet to be reconciled, so unambiguous constraints on the timing of deposition of the Dongshan Formation within the Boli Basin are required. In this study, zircon U–Pb dating of a sample from the 855 drill core, eastern Boli Basin, provides a new constraint on the age of the Dongshan Formation (107.15 ± 0.65 Ma) and new limits on the spatial extent of the Dongshan Formation within the eastern Boli Basin.