The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2026
Filed:
Nov. 09, 2022
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, CN;
Shitou Wu, Beijing, CN;
Yueheng Yang, Beijing, CN;
Hao Wang, Beijing, CN;
Lei Xu, Beijing, CN;
Chao Huang, Beijing, CN;
Liewen Xie, Beijing, CN;
Abstract
The present disclosure discloses an in situ U—Pb dating method for calcite, including: cutting a calcite sample to prepare an epoxy resin sample target; placing the sample in a laser ablation sample chamber, and adjusting a position of the sample in an optical axis direction; conducting line scanning ablation on the sample target, and measuring ion signal intensity data ofCa,Sr,La, andU; conducting two-dimensional (2D) element imaging to obtain a 2D element content distribution map; according to the 2D element content distribution map, determining a high-U analysis target area, conducting point ablation on the high-U target area, and measuring ion signal intensity data ofPb,Pb, andU; and after the element signal data is obtained, calculatingPb/Pb andU/Pb fractionation coefficients, correcting ratios of an unknown sample, constructing a Tera-Wasserbug diagram, and calculating age data and an initial Pb isotope (Pb/Pb) composition of the calcite sample.