Uranium series dating of stalagmites from Blanchard Springs Caverns, U.S.A.

Thompson, Geoffrey; Lumsden, David N.; Walker, R.L.; Carter, Joel A.

doi:10.1016/0016-7037(75)90128-3

Cited by 22 publications

(5 citation statements)

References 10 publications

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“…Presumably, floods swept the detritus into cavities on the surface of the stalagmites which were subsequently sealed off by calcite growth layers. Cavities are quite common in stalagmites [24][25] and such cavities are found on the present surface of our stalagmites and do contain detritus. Figure 6 shows an example of typical cavities found inside our stalagmites.…”

Section: Magnetic Mineralsmentioning

confidence: 88%

Magnetic Anisotropy and the Paleosecular Variation Record in Stalagmites from Njirak Cave, East Java: The Effect of Detrital Magnetite Emplaced in Small Cavities by Flooding Events

Bijaksana

Zulaikah

Hodych

2016

ijp

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Magnetic anisotropy and remanence were measured for 33 samples from the axis of two stalagmites from Njirak Cave in East Java. All 33 samples were stepwise demagnetized with alternating fields, but only 16 were stable enough to yield reliable characteristic remanence directions. These directions differ, especially in declination, from the present Earth’s field direction and agree for samples of about the same age from both stalagmites, suggesting that the Earth’s field at Njirak Cave maintained a declination averaging 23° and an inclination averaging −23° for most of the past 2,500 years. Anisotropy of magnetic susceptibility is high, averaging 5.8%. The minimum susceptibility axes are nearly horizontal with scattered declinations; whereas the maximum susceptibility axes tend to be steeply inclined (average inclination is 51°). This implies that the long axes of the mainly multi-domain magnetite grains tend to be steeply inclined (rather than horizontal, as expected if the magnetite were in horizontal detrital layers). We suggest that this is due to the magnetite being in flood-emplaced detritus adhering to the steeply-inclined sides of small (2 to 5 mm) cavities that cut across and are sealed off by the stalagmites’ horizontal calcite growth layers. Steeply inclined maximum susceptibility axes should help detect such stalagmites, whose quality of paleosecular variation record may be lowered by magnetite-bearing cavities.

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Section: Magnetic Mineralsmentioning

confidence: 88%

Magnetic Anisotropy and the Paleosecular Variation Record in Stalagmites from Njirak Cave, East Java: The Effect of Detrital Magnetite Emplaced in Small Cavities by Flooding Events

Bijaksana

Zulaikah

Hodych

2016

ijp

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“…8) concerning a similar sample. 5 The problem of having a representative sample is probably more important in this ®eld than the problem of the selection a method for studying objects.…”

Section: Discussionmentioning

confidence: 99%

Analysis of speleothems by electron and X-ray microprobes

Kuczumow

Vekemans

Schalm

et al. 2001

J. Anal. At. Spectrom.

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“…Immense technical progress has facilitated the transition from the first speleothem studies, which broadly placed periods of speleothem growth into the global climatic context (Harmon, 1979;Hendy and Wilson, 1968;Thompson et al, 1975), to studies adopting increasingly detailed sub-annual resolution sampling (Fairchild et al, 2001;Johnson et al, 2006;Liu et al, 2013;Maupin et al, 2014;Myers et al, 2015;Ridley et al, 2015b;Ronay et al, 2019;Treble et al, 2005a). Methodological developments, particularly after the mid-2000s and particularly with respect to trace element analysis, greatly reduced the required sample size and increased measurement precision.…”

Section: Increasing Resolution Of Analysismentioning

confidence: 99%

Detecting and quantifying palaeoseasonality in stalagmites using geochemical and modelling approaches

Baldini

Lechleitner

Breitenbach

et al. 2021

Quaternary Science Reviews

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Stalagmites are an extraordinarily powerful resource for the reconstruction of climatological palaeoseasonality. Here, we provide a comprehensive review of different types of seasonality preserved by stalagmites and methods for extracting this information. A new drip classification scheme is introduced, which facilitates the identification of stalagmites fed by seasonally responsive drips and which highlights the wide variability in drip types feeding stalagmites. This hydrological variability, combined with seasonality in Earth atmospheric processes, meteoric precipitation, biological processes within the soil, and cave atmosphere composition means that every stalagmite retains a different and distinct (but correct) record of environmental conditions. Replication of a record is extremely useful but should not be expected unless comparing stalagmites affected by the same processes in the same proportion. A short overview of common microanalytical techniques is presented, and suggested best practice discussed. In addition to geochemical methods, a new modelling technique for extracting meteoric precipitation and temperature palaeoseasonality from stalagmite d 18 O data is discussed and tested with both synthetic and real-world datasets.Finally, world maps of temperature, meteoric precipitation amount, and meteoric precipitation oxygen isotope ratio seasonality are presented and discussed, with an aim of helping to identify regions most sensitive to shifts in seasonality.

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Uranium series dating of stalagmites from Blanchard Springs Caverns, U.S.A.

Cited by 22 publications

References 10 publications

Magnetic Anisotropy and the Paleosecular Variation Record in Stalagmites from Njirak Cave, East Java: The Effect of Detrital Magnetite Emplaced in Small Cavities by Flooding Events

Magnetic Anisotropy and the Paleosecular Variation Record in Stalagmites from Njirak Cave, East Java: The Effect of Detrital Magnetite Emplaced in Small Cavities by Flooding Events

Analysis of speleothems by electron and X-ray microprobes

Detecting and quantifying palaeoseasonality in stalagmites using geochemical and modelling approaches

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