An ion-selective electrode method for determination of chlorine in geological materials

Aruscavage, P. J.

doi:10.1016/0039-9140(83)80171-4

Cited by 42 publications

(28 citation statements)

References 9 publications

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“…Total Cl was determined using the ion-specific electrode method (Aruscavage and Campbell, 1983) at MZ's laboratory at the University of Arizona. For open vessel samples, total Cl measurements were repeated a minimum of three times until the standard error of the mean fell below 5% of the total chlorine concentration.…”

Section: Laboratory Methodsmentioning

confidence: 99%

Ages and inferred causes of Late Pleistocene glaciations on Mauna Kea, Hawai'i

Pigati

Zréda

Zweck

et al. 2008

J Quaternary Science

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Glacial landforms on Mauna Kea, Hawai'i, show that the summit area of the volcano was covered intermittently by ice caps during the Late Pleistocene. Cosmogenic 36 Cl dating of terminal moraines and other glacial landforms indicates that the last two ice caps, called Older Makanaka and Younger Makanaka, retreated from their maximum positions approximately 23 ka and 13 ka, respectively. The margins and equilibrium line altitudes of these ice caps on the remote, tropical Pacific island were nearly identical, which would seem to imply the same mechanism for ice growth. But modelling of glacier mass balance, combined with palaeotemperature proxy data from the subtropical North Pacific, suggests that the causes of the two glacial expansions may have been different. Older Makanaka air atop Mauna Kea was likely wetter than today and cold, whereas Younger Makanaka times were slightly warmer but significantly wetter than the previous glaciation. The modelled increase in precipitation rates atop Mauna Kea during the Late Pleistocene is consistent with that near sea level inferred from pollen data, which suggests that the additional precipitation was due to more frequent and/or intense tropical storms associated with eastward-moving cold fronts. These conditions were similar to modern La Niñ a (weak ENSO) conditions, but persisted for millennia rather than years. Increased precipitation rates and the resulting steeper temperature lapse rates created glacial conditions atop Mauna Kea in the absence of sufficient cooling at sea level, suggesting that if similar correlations existed elsewhere in the tropics, the precipitation-dependent lapse rates could reconcile the apparent difference between glacial-time cooling of the tropics at low and high altitudes.

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Section: Laboratory Methodsmentioning

confidence: 99%

Ages and inferred causes of Late Pleistocene glaciations on Mauna Kea, Hawai'i

Pigati

Zréda

Zweck

et al. 2008

J Quaternary Science

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“…The most important of these is with regard to the determination of the Cl concentration of the rock samples. Until 1994, the Cl concentration was measured on a separate aliquot of rock powder by ion-specifi c electrode (ISE) in a Tefl on diffusion cell apparatus, according to the procedure of Aruscavage and Campbell (1983) and Elsheimer (1987). After 1994, we employed isotope-dilution mass spectrometry (ID-MS).…”

Section: Chlorine-36 Processing and Analysismentioning

confidence: 99%

Glacial geology and chronology of Bishop Creek and vicinity, eastern Sierra Nevada, California

et al. 2009

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The valley of Bishop Creek, which drains part of the eastern fl ank of the Sierra Nevada, California, contains an unusually well-preserved set of middle to late Quaternary moraines. These deposits have been mapped by previous investigators, but they have not been quantitatively dated. We used the accumulation of cosmogenic 36 Cl to assign a chronology to the maximal glacial positions mapped in the valley. Our results indicate that the terminal moraines mapped by previous investigators as Tahoe were all deposited between ca. 165 and ca. 135 ka, during marine isotope stage (MIS) 6. Moraines mapped as Tioga were deposited between 28 and 14 ka, during MIS 2. These can be subdivided into Tioga 1 (28-24 ka), Tioga 3 (18.5-17.0 ka), and Tioga 4 (16.0-14.5 ka) advances (no moraines dated to Tioga 2 [21-19 ka] were found, presumably because the Tioga 3 advance either overrode or fl uvially eroded them). At 15.0-14.5 ka, the Tioga 4 glacier retreated abruptly to the crest of the range. This was followed by the brief and fairly minor Recess Peak advance at ca. 13.4 ka. No Holocene advances extended beyond the very restricted limits of ice during the Matthes (Little Ice Age) advance. All preserved terminal moraines at lower elevations were deposited during either the Tahoe or Tioga stades. The Tahoe terminal moraines are extensive and voluminous, whereas the Tioga moraines are relatively narrow and have small volumes. However, this notable difference may be more a result of idiosyncrasies in the local glacial history than the result of differences in the length or intensity of glaciation between the two glacial episodes. The history of glacial advances at Bishop Creek exhibits a strong correspondence to global climate cycles, and to paleoclimate events in the North Atlantic in particular.

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“…of Arizona Hydrology Dept. ), and total Cl was determined by specific anion electrode (Aruskavage and Campbell, 1983). Major elements were measured by prompt gamma spectroscopy, and U and Th by neutron activation analysis.…”

Section: Preparation and Analytical Techniquesmentioning

confidence: 99%