Magnesium and strontium systematics in tropical speleothems from the Western Pacific

Sinclair, D. J.; Banner, Jay L.; Taylor, Frederick W.; Partin, J. W.; Jenson, John W.; Mylroie, John E.; Goddard, Ethan A.; Quinn, T. M.; Jocson, John; Miklavič, Blaž

doi:10.1016/j.chemgeo.2011.10.008

Cited by 116 publications

(126 citation statements)

References 69 publications

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“…PCP is the calcite that precipitates from the parent water before it reaches the stalagmite (Fairchild and Baker, 2012). According to a theoretical derivation, the slope of ln(Mg / Ca) vs. ln(Sr / Ca) should equal 0.88 ± 0.13 if PCP is dominating (Sinclair et al, 2012). In these datasets, calculated slopes were close to zero, as there were no consistent relationships between these two variables in either speleothem (r = 0 to −0.1 over all key periods of interest; Supplement Fig.…”

Section: Mairs Cave Speleothem Mg / Ca and Sr / Camentioning

confidence: 99%

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

et al. 2017

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Abstract. Terrestrial data spanning the Last Glacial Maximum (LGM) and deglaciation from the southern Australian region are sparse and limited to discontinuous sedimentological and geomorphological records with relatively large chronological uncertainties. This dearth of records has hindered a critical assessment of the role of the Southern Hemisphere mid-latitude westerly winds on the region's climate during this time period. In this study, two precisely dated speleothem records for Mairs Cave, Flinders Ranges, are presented, providing for the first time a detailed terrestrial hydroclimatic record for the southern Australian drylands during 23-15 ka. Recharge to Mairs Cave is interpreted from the speleothem record by the activation of growth, physical flood layering, and δ 18 O and δ 13 C minima. Periods of lowered recharge are indicated by 18 O and 13 C enrichment, primarily affecting δ 18 O, argued to be driven by evaporation of shallow soil/epikarst water in this water-limited environment. A hydrological driver is supported by calcite fabric changes. These include the presence of laminae, visible organic colloids, and occasional dissolution features, related to recharge, as well as the presence of sediment bands representing cave floor flooding. A shift to slower-growing, more compact calcite and an absence of lamination is interpreted to represent reduced recharge.

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Section: Mairs Cave Speleothem Mg / Ca and Sr / Camentioning

confidence: 99%

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

et al. 2017

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“…It is noticeable that Mg and Sr intensities were much higher in coralloids than in moonmilk. So far it should be also noticed that strontium and magnesium were considered as elements of major interest in the composition of speleothems [8]- [10]. Actually, the presence of strontium is directly linked to the growth rate of speleothems and was consequently used as an indicator of the growth speed [8].…”

Section: Photonic Methods and Resultsmentioning

confidence: 99%

Photons and electrons for the study of a white veil covering some walls in prehistoric caves

et al. 2017

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Our research deals with the evolution of wall surfaces in prehistoric caves. The focus of this paper is dedicated to the structural and chemical characterization of a white concretion partially covering some walls in caves. In one of the caves, a non-ornate one which became a laboratory-cave (the Leye cave at Marquay, Dordogne, France) located in the Vézère valley, a set of physical methods has been proposed and tested on the first samples taken: SEM-EDXS, cathodoluminescence and laser-based techniques such as Raman spectroscopy and Laser Induced Breakdown Spectroscopy and LIBS. Thus two facies mainly composed of calcium carbonate crystals have been determined: moonmilk and coralloids. The identification of theses crystalline phases is the first step of an ambitious research project that plans to understand the development of unexpected layers on the cave walls of the famous ornate caves listed as part of the UNESCO cultural heritage sites. This first set of data provides good insight to the structure and the physico-chemical composition of the involved materials. Future works will be dedicated to bring knowledge about the facies chronology, the climatic conditions of environment (temperature, CO<sub>2 </sub>rate and air velocities) over a long period.

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“…Mineralogy, depositional environment and digenesis can impact the concentration of trace elements in carbonates. Concentrations of the trace elements can also be changed during diagenetic recrystallization (Rollinson, 1993;Finch and Allison, 2007;Sinclair et al, 2012) making variations in trace composition a good indicator or source (Muhs et al, 1995). The specific line locations for the peaks used are highlighted on Fig.…”

Section: Tablementioning

confidence: 98%

Source provenance of carbonate grains in the Wahiba Sand Sea, Oman, using a new LIBS method

Pease

Tchakerian

2014

Aeolian Research

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Magnesium and strontium systematics in tropical speleothems from the Western Pacific

Cited by 116 publications

References 69 publications

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

Photons and electrons for the study of a white veil covering some walls in prehistoric caves

Source provenance of carbonate grains in the Wahiba Sand Sea, Oman, using a new LIBS method

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Magnesium and strontium systematics in tropical speleothems from the Western Pacific

Cited by 116 publications

References 69 publications

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

Photons and electrons for the study of a white veil covering some walls in prehistoric caves

Source provenance of carbonate grains in the Wahiba Sand Sea, Oman, using a new LIBS method

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Product

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Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)

Hydroclimate of the Last Glacial Maximum and deglaciation in southern Australia's arid margin interpreted from speleothem records (23–15 ka)