Response of trace and rare earth elements to environmental changes in a stalagmite from southern India for the last deglaciation

Raza, Waseem; Sawant, Sariput; Ahmad, Syed Masood; Sarma, Drona Srinivasa; Babu, E.V.S.S.K.

doi:10.1016/j.quaint.2023.09.003

Cited by 2 publications

(1 citation statement)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to the proxies of oxygen and carbon isotopes and trace elements in stalagmites, understanding the significance of organic matter in stalagmite paleoclimate reconstruction through modern cave monitoring and deciphering the signal transmission and mechanisms of organic matter in karst systems is particularly important. Long-term monitoring studies in caves have primarily focused on stable isotopes (δ 18 O, δ 13 C) [12][13][14][15][16] and trace elements (Mg, Ca Ba Sr) as representatives of inorganic geochemical processes with climatic implications [17][18][19][20]; relatively less attention has been paid to organic geochemical processes [3,[21][22][23][24]. Currently, the modern monitoring of organic matter in caves has been limited in duration, with the majority of studies focused on investigating the mechanisms behind the formation of fluorescent luminescence laminae in stalagmites [10,25,26].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Influencing Factors of Dissolved Organic Matter in Cave Drip Water—A Case Study from Furong Cave, Southwest China

He,

Li,

et al. 2024

Water

View full text Add to dashboard Cite

Understanding the hydrological processes of dissolved organic matter (DOM) in the surface karst zone is crucial for the utilization and safety of groundwater resources. However, research on DOM in drip water from karst caves is limited. In this study, continuous monitoring was conducted for four years at four drip water monitoring sites (MP1, MP2, MP3, and MP9) in Furong Cave, Southwest China. The three-dimensional fluorescence excitation–emission spectroscopy (3D-EEM) and fluorescence region integration (FRI) methods were employed, along with correlation analysis, to investigate the spectral characteristics, composition, sources, and influencing factors of the DOM in the drip water of Furong Cave. The results indicated that (1) the three-dimensional fluorescence peaks in the drip water were classified into six categories: A, B, C, T, Ti, and M. (2) The dominant source of the drip water DOM is endogenous organic matter. (3) The FRI analysis indicates a relatively high proportion of Type II substances in the drip water, predominantly composed of tryptophan-like substances. (4) The DOM in the drip water of Furong Cave was influenced by various factors, including the mixing effect of “new” and “old” water, water residence time in karst systems, and water–rock interactions (WRI), resulting in the complex responses of drip rates and DOM to surface precipitation and temperature at different drip water sites. This study provides a reference for comparative research on DOM in cave drip water in karst regions, which contributes to a better understanding of the migration mechanism of DOM in karst aquifers under different climate and karst ecological conditions.

show abstract