High-temperature wood silicification: constraints from fluid and carbonaceous inclusions in quartz from Qitai, NW China.

ABSTRACT: Silicified wood serves as a crucial geological archive, recording significant information about palaeoenvironment, palaeoecology, palaeontology and diagenetic conditions. However, temperature and pressure conditions of silicification remain poorly constrained. In this study, we analysed primary fluid and carbonaceous material inclusions in quartz from silicified wood in the Qitai Silicified Forest, Xinjiang. Microthermometry and Raman spectroscopic studies reveal the methane-bearing silicification fluids, with salinities of 12.05-14.87 wt% NaCl equiv., densities ranging from 0.94 to 0.96 g/cm³, homogenization temperatures in the range of 238-257 °C, and provide the converting temperatures of 285 ± 30 °C for carbonaceous inclusions. Silicification temperatures are constrained to

SUBMITTER: Liu W 

PROVIDER: S-EPMC12673128 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature