Results 21 to 30 of about 4,019 (310)

Geochemical Characteristics of Limestone of Wonosari-Punung Formation, Gunungkidul Regency, Yogyakarta, Indonesia

Indonesian Journal on Geoscience, 2018
DOI: 10.17014/ijog.5.2.179-197A geochemical study was carried out to determine the geochemical characteristics of limestone in Wonosari-Punung Formation, and to suggest its depositional conditions and the source of rare earth elements.
Didik Dwi Atmoko, Anastasia Dewi Titisari, Arifudin Idrus   +2 more
doaj   +1 more source

Episodic dolomitization of Paleozoic limestones in the Kinta Valley, Malaysia: Implications on porosity evolution and reservoir properties

Energy Geoscience, 2021
Carbonates undergo a variety of physical, mineralogical, chemical changes during depositional and post-depositional stages that are of interest to exploration geologists and sedimentologists.
Poon Xin Hui, Mu. Ramkumar, R. Nagarajan, Manoj J. Mathew, T.F. Ng   +4 more
doaj   +1 more source

Air mass origin and local impacts on Antarctic snow isotopic composition: an observation and modelling study [PDF]

The Cryosphere
Water stable isotopes (δ18O and δD) from ice cores are widely used to reconstruct past temperature variations through their well-established relationship with local air temperature, commonly referred to as “isotopic paleothermometer”.
A. Petteni, A. Petteni, M. Casado, C. Leroy-Dos Santos, A. Landais, N. Dutrievoz, C. Agosta, P. D. Akers, P. D. Akers, J. Savarino, A. Spolaor, M. Frezzotti, B. Stenni   +12 more
doaj   +1 more source

Nitrogen isotopes in bulk marine sediment: linking seafloor observations with subseafloor records [PDF]

Biogeosciences, 2013
The stable isotopes of nitrogen offer a unique perspective on changes in the nitrogen cycle, past and present. However, the presence of multiple forms of nitrogen in marine sediments can complicate the interpretation of bulk nitrogen isotope measurements.
J.-E. Tesdal, E. D. Galbraith, M. Kienast   +2 more
doaj   +1 more source

First records of syn-diagenetic non-tectonic folding in quaternary thermogene travertines caused by hydrothermal incremental veining [PDF]

, 2017
In our previous paper (Billi et al., 2017), using field geological observations, U-Th dating, and stable isotope analyses, we studied two deposits of Pleistocene thermogene travertines from Tuscany in central Italy.
Gratier J. P., Berardi G., Berardi, Gabriele, Gratier, Jean-Pierre, Bernasconi, Stefano M, Chuan-Chou Shen, Vignaroli, Gianluca, Mehmet Oruç Baykara, De Filippis, Luigi, Oruc Baykara M., Stefano M. Bernasconi, Baykara, Mehmet Oruç, Shen, Chuan-Chou, Baykara, Mehmet Oruç, Baykara, M. Oruç, Billi, Andrea, Shen, Chuan Chou, Bernasconi, Stefano M., Gabriele Berardi, Luigi De Filippis, Billi A., Kele S., M. Oruç Baykara, Bernasconi S., Filippis, Luigi De, Federico Rossetti, Gratier, Jean Pierre, Kele, Sándor, Gianluca Vignaroli, Andrea Billi, Michele Soligo, Oruç Baykara, M, Vignaroli G., Kele, Sándor, Jean-Pierre Gratier, SOLIGO, Michele, ROSSETTI, FEDERICO, De Filippis L., Sándor Kele, Shen C. C.   +39 more
core   +3 more sources

Radioactivity in sediments of the Great Lakes: Post-depositional redistribution by deposit-feeding organisms [PDF]

, 1977
At two locations in southern Lake Huron (U.S.A.), twelve 35.5-cm diameter cores of fine-grained sediments were taken for comparison of the vertical distributions of 210Pb and falllout 137Cs with the distributions of benthic macroinvertebrates, mainly ...
Krezoski, John R., Robbins, John A., Mozley, S. C.   +2 more
core   +1 more source

Micromorphology of modern tills in southwestern Spitsbergen – insights into depositional and post-depositional processes

Polish Polar Research, 2016
AbstractTextural properties and microstructures are commonly used properties in the analysis of Pleistocene and older glacial deposits. However, contemporary glacial deposits are seldom studied, particularly in the context of post-depositional changes.
Skolasińska Katarzyna, Rachlewicz Grzegorz, Szczuciński Witold   +2 more
openaire   +2 more sources

EFFECTS OF DEPOSITIONAL PROCESSES ON STRENGTH AND COMPRESSIBILITY OF SEDIMENTS USING ELASTIC SHEAR WAVE VELOCITY [PDF]

, 2019
Depositional processes are the most critical, complicated conditions that govern sediment properties and their variations, which in turn significantly affect the geotechnical behavior of the sediment.
Muttashar, Wisam Razzaq
core   +2 more sources

Trampling Experiments – A Contribution to the Pseudo-Retouch Issue

EXARC Journal, 2020
Stone tools can, apart from human-made retouch, exhibit traces of damage due to post depositional processes. As a result of post depositional factors, whether animal, human or natural in origin, this damage can sometimes be interpreted as human-made ...
Katarina Šprem, Katarina Gerometta, Ivor Karavanić   +2 more
doaj  

Mercury deposition and redox transformation processes in peatland constrained by mercury stable isotopes

Nature Communications, 2023
Peatland vegetation takes up mercury (Hg) from the atmosphere, typically contributing to net production and export of neurotoxic methyl-Hg to downstream ecosystems. Chemical reduction processes can slow down methyl-Hg production by releasing Hg from peat
Chuxian Li, Martin Jiskra, Mats B. Nilsson, Stefan Osterwalder, Wei Zhu, Dmitri Mauquoy, Ulf Skyllberg, Maxime Enrico, Haijun Peng, Yu Song, Erik Björn, Kevin Bishop   +11 more
doaj   +1 more source