The elemental content of Niue Island soils as an indicator of their origin

Whitehead, N. E.; Hunt, John L.; Leslie, David M.; Rankin, P. C.

doi:10.1080/00288306.1993.9514572

Cited by 21 publications

(25 citation statements)

References 37 publications

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“…Soil mineral content consists primarily of gibbsite, goethite, crandallite, and boehmite (Whitehead et al, 1993). Wheeler et al (1999) summarized Niue dolomite textures and geochemistry: upper dolomites (À20 to +40 m above sea level) are calcian to stoichiometric, with major element composition ranging from 40.2 to 46.7 Mg mol%, 93 to 286 ppm Sr, and 144 to 462 ppm Na (n = 91) (Table A1).…”

Section: Site Descriptionmentioning

confidence: 99%

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A two-year automated dripwater chemistry study in a remote cave in the tropical south Pacific: Using [Cl−] as a conservative tracer for seasalt contribution of major cations

Tremaine

Sinclair

Stoll

et al. 2016

Geochimica et Cosmochimica Acta

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Stalagmite Mg/Ca and Sr/Ca ratios are commonly interpreted as proxies for past hydrologic conditions and are often used to supplement carbon and oxygen stable isotope records. While the processes that control these element ratios, including water-rock interaction, dripwater residence time, and upstream precipitation of calcite, are well understood in continental caves, there have been few investigations of dripwater Element/Ca (X/Ca) evolution in coastal marine caves where seasalt can have a strong influence on the incoming Mg/Ca ratio.We instrumented a marine cave on the remote South Pacific island of Niue to record daily cave microclimate, as well as weekly-integrated drip rates, dripwater oxygen and hydrogen isotopes, and dripwater chemistry over a period of twenty-two months. Using chloride as a conservative tracer for sea-spray, we calculate that seasalt input accounts for a large portion of dripwater Na, SO 4 , and Mg (89%, 93%, and 85% respectively) and a smaller portion of the Ca and Sr (19% and 17%). During the second year of this study a gradual decrease (by $18%) in dripwater chlorinity was observed, suggesting that an epikarsthosted seasalt aerosol inventory was being diluted over time. Minor element to calcium ratios for B, K, Cl, SO 4 , Mg, Na, Sr, and Fe all strongly covary over the observation period, suggesting that although sea-spray plays a significant role in modulating incoming drip chemistry, prior calcite precipitation (PCP) dominates chemical evolution within the epikarst. During a prolonged drought episode, evaporative enrichments in dripwater dD and d 18 O (+4‰ and 0.5‰, respectively) were observed to coincide with increased cation and anion concentrations, strong Ca removal via PCP, and increases in Sr/Ca and Mg/Ca ratios (28% and 34%, respectively), suggesting that concomitant enrichment in speleothem d 18 O and X/Ca ratios may be interpreted as multi-proxy evidence for dry climate conditions. We use modern dripwater chemistry and empirical water-calcite distribution coefficients to predict a range of stalagmite X/Ca ratios. We then forward model a number of scenarios that could modulate stalagmite chemistry, including increased/decreased seasalt input and changing dripwater flow path through calcite, dolomite, and aragonite bedrock. One major implication from this study is that even if PCP and flow path lithology remain constant over time, changing seasalt input can drive stalagmite Mg/Ca and Sr/Ca ratios away from PCP-controlled covariation, and lead to strongly varying http://dx. ScienceDirect Geochimica et Cosmochimica Acta 184 (2016) 289-310Sr/Mg ratios. Thus in order to interpret coastal cave stalagmite X/Ca records accurately, it is necessary to estimate seasalt input and analyze parent drip and bedrock chemistry to quantify the influence of each contributing process.

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Section: Site Descriptionmentioning

confidence: 99%

“…See Tables A1-A5 Table A1 Niue bedrock and soil elemental concentrations converted to mmol mol À1 units after Whitehead et al (1993). Bold cells are their bulk rock analyses assuming that all elements are in oxide form.…”

Section: Appendix Amentioning

confidence: 99%

A two-year automated dripwater chemistry study in a remote cave in the tropical south Pacific: Using [Cl−] as a conservative tracer for seasalt contribution of major cations

Tremaine

Sinclair

Stoll

et al. 2016

Geochimica et Cosmochimica Acta

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“…Rubification happens during weathering processes (Glazovskaya and Parfenova, 1974;Moresi and Mongelli, 1988;Whitehead et al, 1993;Wang et al, 1999;Ji et al, 2004).…”

Section: Geological Setting and Sample Collectionmentioning

confidence: 99%

“…The origin of terra rossa has also been investigated using grain size parameters, clay and debris minerals, rare earth elements (REEs) and Sr and Nd isotopic composition methods (Perrin, 1956;Yaalon and Ganor, 1973;Jackson et al, 1982;Whitehead et al, 1993;Borg and Banner, 1996;Durn et al, 1999;Mee et al, 2004). However, with pos-Resolving genetic issues of terra rossa provides important information for the study of karst processes.…”

Section: Introductionmentioning

confidence: 99%

Origin of terra rossa over dolomite on the Yunnan-Guizhou Plateau, China

2009

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The origin of terra rossa and its relationship with its underlying carbonate rocks pose long-standing and controversial questions. This study focuses on one 5.4 m thick terra rossa profile on dolomite. The authors examined the quartz content, size distribution of quartz grains, mineral composition, surface micro-texture and crystal morphology of quartz, oxygen isotope ratios of quartz, and other tracers in the terra rossa and underlying dolomite to determine the derivation of terra rossa. The results indicate that terra rossa in the Dashandong profile on the Yunnan-Guizhou Plateau, China, is an in situ weathering solum. The terra rossa originates mostly from insoluble residues of the parent dolomite. The debris minerals (quartz and feldspar) derive completely from the parent dolomite. The clay minerals, and Al, Fe and Mn oxides and hydroxides likely have three origins. One portion derives from insoluble residues of the parent dolomite. A second portion converts from primary minerals in the parent dolomite. The last contribution comes from authigenic minerals from aqueous solutes transported by the water cycle. Authigenic minerals constitute the main components of the terra rossa. During weathering processes, the dolomite weathering functions as a "trap" against the escape of in situ insoluble residues and external aqueous solutes by means of poly-genetic chemical and physical barriers.

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“…Some TR is not the product of weathering in situ, and therefore does not have a close genetic relationship with the carbonate rocks underlying it, and probably does not provide the best opportunity for uncovering the behavior of trace elements during karst weathering (Feng et al, 2009a, b); however, trace elements have been used to determine TR origin (Whitehead et al, 1993;Ji et al, 2004;Mee et al, 2004;Muhs and Budahn, 2009;Muhs et al, 2010). Whatever the case may be, a sound knowledge of the geochemical behavior of trace elements during karst weathering and pedogenesis is required for logically tracing the TR origin (Feng, 2011).…”

Section: Introductionmentioning

confidence: 99%

Enrichment of trace elements in ferromanganese concretions from terra rossa and their potential desorption

et al. 2012

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The distributions of trace elements in ferromanganese concretions (FMCs) and the surrounding terra rossa (TR) matrix overlying dolomite have been examined to extend our understanding of their mobilization, redistribution and fractionation during karst weathering and pedogenesis. This study demonstrates that the characteristics of trace elements in TR have been severely overprinted by weathering and pedogenetic processes. The composition of trace elements in FMCs within TR soil profiles varies greatly with depth. The concentrations of Be, Ni, Cu, Zn, As and Bi in FMCs fluctuate and tend to increase with depth; other trace element concentrations fluctuate in the profile but show no clear trend. The toxic elements Cr, As, Cd, Tl and Pb, as well as Co, are significantly enriched in FMCs relative to the surrounding TR matrix: arsenic exhibits strong affinity with Fe, but Cr and Cd contents are not significantly correlated with either Mn or Fe. Correspondingly, Co, Tl and Pb are related to the Mn in FMCs rather than the Fe. In FMCs, trace element distribution and partitioning in the Mn-Fe phases are governed by the location-specific formational pedoenvironment, with the weathering front etching downwards. Experiments with simulated acid rain indicate that desorption of elements from FMCs is generally pH-dependent regardless of the variation of the released amounts and their desorbability. Moreover, it seems that toxic elements bonded to Mn-phase were easily desorbed from FMCs. As a result, the bioavailability, mobility and activity of some toxic elements in FMCs and TR are potentially increased in field areas experiencing severe soil erosion and acid rain.

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The elemental content of Niue Island soils as an indicator of their origin

Cited by 21 publications

References 37 publications

A two-year automated dripwater chemistry study in a remote cave in the tropical south Pacific: Using [Cl−] as a conservative tracer for seasalt contribution of major cations

A two-year automated dripwater chemistry study in a remote cave in the tropical south Pacific: Using [Cl−] as a conservative tracer for seasalt contribution of major cations

Origin of terra rossa over dolomite on the Yunnan-Guizhou Plateau, China

Enrichment of trace elements in ferromanganese concretions from terra rossa and their potential desorption

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