Results 21 to 30 of about 65,019 (260)

An innovative optical and chemical drill core scanner [PDF]

Scientific Drilling, 2015
We describe a new innovative drill core scanner that semi-automatedly analyses drill cores directly in drill core trays with X-ray fluorescence spectrometry, without the need for much sample preparation or operator intervention.
A. S. L. Sjöqvist, M. Arthursson, A. Lundström, E. Calderón Estrada, A. Inerfeldt, H. Lorenz   +5 more
doaj   +1 more source

Data report: composite depth scale and splice revision for IODP Site U1488 (Expedition 363 Western Pacific Warm Pool) using XRF core scanning data and core images

Western Pacific Warm Pool, 2021
The Western Pacific Warm Pool (WPWP) is a major source of heat and moisture to the atmosphere. Small perturbations in WPWP sea-surface temperatures greatly influence local Hadley and Walker cells, thereby affecting global atmospheric circulation patterns.
A. Drury, D. Kulhanek, T. Westerhold, A. Ravelo, G. Mountain, A. Holbourn, Y. Rosenthal, A. Schmitt, J. B. Wurtzel, J. Xu, R. Wilkens, U. Röhl   +11 more
semanticscholar   +1 more source

What Can We Learn From X‐Ray Fluorescence Core Scanning Data? A Paleomonsoon Case Study

Geochemistry, Geophysics, Geosystems, 2020
X‐ray fluorescence (XRF) core scanning of marine and lake sediments has been extensively used to study changes in past environmental and climatic processes over a range of timescales.
D. Gebregiorgis, L. Giosan, E. C. Hathorne, P. Anand, K. Nilsson‐Kerr, A. Plass, A. Lückge, S. C. Clemens, M. Frank   +8 more
doaj   +1 more source

The Wunstorf Drilling Project: Coring a Global Stratigraphic Reference Section of the Oceanic Anoxic Event 2 [PDF]

Scientific Drilling, 2007
The Wunstorf drilling project aims at establishing a high resolution stable isotope record for the black shale succession (OAE 2) of the CTBI and developing this into a globally applicable high resolutionbio- and chemostratigraphic reference section ...
Markus Wilmsen, Jörg Mutterlose, Jochen Erbacher, the Wunstorf Drilling Scientific Party, Thomas Wonik   +4 more
doaj   +1 more source

IDENTIFICATION OF GEOCHEMICAL MARKERS OF VOLCANISM BY THE CLUSTER ANALYSIS FOR THE BOTTOM SEDIMENTS OF THE THERMAL LAKE FUMAROLNОЕ ACCORDING TO SR-XRF

Геодинамика и тектонофизика, 2022
We carried out layer-by-layer scanning (with a step of 1 mm) of the bottom sediments of the thermal lake Fumarolnое with SR-XRF (X-ray fluorescence analysis using synchrotron radiation). The lake is located in the caldera of the Uzon volcano (Kamchatka).
I. S. Kirichenko, E. V. Lazareva, S. M. Zhmodik   +2 more
doaj   +1 more source

Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Expedition 342) [PDF]

, 2018
Earth’s climate during the Maastrichtian (latest Cretaceous) was punctuated by brief warming and cooling episodes, accompanied by perturbations of the global carbon cycle.
Agnini, Claudia, Batenburg, S., Blum, P., Bornemann, A., Boulila, S., Bown, P. R., Courn\ue8de, C., Fehr, A., Fiebig, J., Friedrich, O., Ghosh, A. K., Hasegawa, T., Hollis, C. J., Hull, P. M., Jo, K., Junium, C. K., Kaneko, M., Liebrand, D., Lippert, P. C., Liu, Z., Matsui, H., Moebius, I., Moriya, K., Nishi, H., Norris, R. D., Opdyke, B. N., Penman, D., R\uf6hl, U., Romans, B., Scher, H. D., Sexton, P., Takagi, H., Turner, S. K., Voigt, S., Westerhold, T., Whiteside, J. H., Wilson, P. A., Yamaguchi, T., Yamamoto, Y.   +38 more
core   +3 more sources

Evaluating Zr/Rb Ratio From XRF Scanning as an Indicator of Grain‐Size Variations of Glaciomarine Sediments in the Southern Ocean

Geochemistry, Geophysics, Geosystems, 2020
The ln(Zr/Rb) count ratio derived from X‐ray fluorescence (XRF) core scanning holds potential as a high‐resolution tracer for grain‐size variations of glaciomarine sediments, and hence current strength.
Li Wu, David J. Wilson, Rujian Wang, Xuebo Yin, Zhihua Chen, Wenshen Xiao, Mengxue Huang   +6 more
doaj   +1 more source

Quantifying calcium carbonate and organic carbon content in marine sediments from XRF-scanning spectra with a machine learning approach

Scientific Reports, 2022
Geochemical variations of sedimentary records contain vital information for understanding paleoenvironment and paleoclimate. However, to obtain quantitative data in the laboratory is laborious, which ultimately restricts the temporal and spatial ...
An-Sheng Lee, Weng-Si Chao, Sofia Ya Hsuan Liou, Ralf Tiedemann, Bernd Zolitschka, Lester Lembke-Jene   +5 more
doaj   +1 more source

Practicality of Hand-held XRF Analyzer in Rapid Exploration of Porphyry Copper Deposit

Yankuang ceshi, 2021
BACKGROUND There is a certain deviation between the on-site analysis results of hand-held XRF and the laboratory analysis results due to the unique technical difficulties in field X-ray fluorescence measurement such as roughness effect, uneven effect and
SUN Wei-tao, ZHENG You-ye, NIU Xue-yao, QIN Yue-qiang, WANG Wei, QIAO Yan-yi, DI Bao-gang, HOU Hong-xing, ZHANG Shu-ji, CONG Peng-fei   +9 more
doaj   +1 more source

Climate variability in SE Europe since 1450 AD based on a varved sediment record from Etoliko Lagoon (Western Greece) [PDF]

, 2017
To achieve deeper understanding of climate variability during the last millennium in SE Europe, we report new sedimentological and paleoecological data from Etoliko Lagoon, Western Greece.
Brauer, Achim, Friedrich, Oliver, Hennrich, Barbara, Koutsodendris, Andreas, Plessen, Birgit, Pross, Jörg, Reed, Jane, Zacharias, Ierotheos   +7 more
core   +1 more source