Luminescence chronology of loess-paleosol sequences from southern South Island, New Zealand

Berger, Glenn W.; Pillans, Brad; Bruce, J. G.; McIntosh, Peter D.

doi:10.1016/s0277-3791(02)00021-5

Cited by 34 publications

(20 citation statements)

References 56 publications

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“…For the same reason mentioned above, this age must be considered a lower limit. However, if it is assumed that this loess formed during a glacial period, as is typical in the lower South Island (e.g., Berger et al 2001Berger et al , 2002, then sample WBE1 was probably deposited near the end of MIS 6 (186-128 ka), as it is unlikely that anomalous fading has resulted in an age underestimation of >300%, as would be the case if the sample was deposited during an older glaciation (i.e., during or before MIS 8). If this assumption is correct, then the overlying beach sand likely formed during the MISS 5e (128-113 ka) sea-level highstand.…”

Section: Marine Terrace Agesmentioning

confidence: 99%

Luminescence age estimates of Pleistocene marine terrace and alluvial fan sediments associated with tectonic activity along coastal Otago, New Zealand

Litchfield¹,

Lian

2004

New Zealand Journal of Geology and Geophysics

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Six luminescence age estimates have been obtained from raised beach sands and loess, and alluvial fan sediments in the outboard zone of the active Otago reverse fault province, coastal Otago, New Zealand. These age estimates constrain the timing of movement of the Akatore Fault and the Titri Fault System. Five of the samples were dated by optical dating of K-feldspar in the polymineral fine silt fraction; the remaining sample was dated using thermoluminescence (TL) emitted from quartz (fine sand fraction). Raised beach sands from the lowest Pleistocene marine terrace on the upthrown side of the reverse faults (Taieri Beach) yielded ages of 117 ± 13 ka (optical dating, K-feldspar) and 117 ± 12 ka (TL dating, quartz), indicating terrace formation during the peak sea-level highstand of the last interglacial, marine oxygen isotope substage (MISS) 5e (c. 125 ka). The K-feldspar optical age has not been corrected for anomalous fading, but its consistency with the quartz TL age indicates that anomalous fading is insignificant in this sample. Samples from a raised beach sand unit and an underlying loess unit that bracket a marine terrace that has previously been associated with the c. 125 ka sea-level highstand, situated 10 km northeast of the effects of faulting (Warrington), yielded optical age (K-feldspar) estimates of 97 ± 11 and 96 ± 5 ka, respectively. These ages have not been corrected for anomalous fading and therefore the true ages might be slightly older. Two loess units within alluvial fans along the Titri Fault System in the Waihola region yielded optical age estimates of 92 ± 5 and 151 ± 5 ka (both K-feldspar), which bracket the last period of faulting along the Titri Fault System; the latter age result is consistent with geomorphic evidence that suggests fan formation during the glacial period MIS 6 (186-128 ka); this consistency also implies that there was no significant anomalous fading in these samples. Together with published radiocarbon ages, our results imply that no activity has occurred on the Akatore Fault in the period c. 125-3.8 ka and only localised activity (at Moneymore) on the Titri Fault System post-150 ka.

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Section: Marine Terrace Agesmentioning

confidence: 99%

Luminescence age estimates of Pleistocene marine terrace and alluvial fan sediments associated with tectonic activity along coastal Otago, New Zealand

Litchfield¹,

Lian

2004

New Zealand Journal of Geology and Geophysics

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“…Two subsamples were taken from the upper loess known as the Yellow Loess Member, which is approximately 2·5 m in depth. The third subsample was taken from the second major loess unit, the Brown A, at 2·66 m. Luminescence ages of c. 60 ka for the bottom of the Yellow Loess mean the bulk of loess was deposited during the Otira glaciation (MIS 2-4), while minimum ages for the Brown A loess of 184 ka suggest loess deposition took place during the Waimea glaciation (MIS 6) (Berger et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Provenance of long‐travelled dust determined with ultra‐trace‐element composition: a pilot study with samples from New Zealand glaciers

Marx

Kamber

McGowan

2005

Earth Surf Processes Landf

106

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We report high-precision inductively coupled plasma mass spectrometric (ICP-MS) compositional data for 39 trace elements in a variety of dust deposits, trapped sediments and surface samples from New Zealand and Australia. Dusts collected from the surface of alpine glaciers in the Southern Alps, New Zealand, believed to have undergone long-distance atmospheric transport from Australia, are recognizable on account of their overabundances of Pb and Cu with respect to typical upper crustal values. Long-travelled dust from Australia therefore scavenges these and other metals (e.g. Zn, Sb and Cd) from the atmosphere during transport and deposition. Hence, due to anthropogenic pollution, long-travelled Australian dusts can be recognized by elevated metal contents.The relative abundance of 25 other elements that are not affected by atmospheric pollution, mineral sorting (Zr and Hf) and weathering/solubility (alkali and earth alkali elements) reflects the geochemistry of the dust source sediment. As a result, we are able to establish the provenance of dust using ultra-trace-element chemistry at regional scale. Comparison of long-travelled dust chemistry with potential Australian sources shows that fits of variable quality are obtained. We propose that the best fitting potential source chemistry most likely represents the major dust source area. A binary mixing model is used to demonstrate that admixture of small quantities of local dust provides an even better fitting dust chemistry for the long-travelled dusts.

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“…Although generally sparse, organic material is present as wood within the gravel-dominated deposits, and also occurs as peat in terrace cover deposits, and charcoal within tephras. Luminescence dating is being increasingly used in New Zealand to extend age control beyond the limits of radiocarbon dating, and has particularly been used to date loess (e.g., Berger et al, 1992Berger et al, , 2001Berger et al, , 2002Litchfield and Lian, 2004). The present study is the first to apply Optically Stimulated Luminescence (OSL) dating directly to fluvial deposits in the eastern North Island, although OSL ages of loess coverbeds have been used to estimate the minimum ages of river terrace deposits (Wang, 2001;Formento-Trigilio et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Correlation of fluvial terraces within the Hikurangi Margin, New Zealand: implications for climate and baselevel controls

Litchfield

Berryman

2005

Geomorphology

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Luminescence chronology of loess-paleosol sequences from southern South Island, New Zealand

Cited by 34 publications

References 56 publications

Luminescence age estimates of Pleistocene marine terrace and alluvial fan sediments associated with tectonic activity along coastal Otago, New Zealand

Luminescence age estimates of Pleistocene marine terrace and alluvial fan sediments associated with tectonic activity along coastal Otago, New Zealand

Provenance of long‐travelled dust determined with ultra‐trace‐element composition: a pilot study with samples from New Zealand glaciers

Correlation of fluvial terraces within the Hikurangi Margin, New Zealand: implications for climate and baselevel controls

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