Results 51 to 60 of about 17,122 (265)

Active growth of non-hydrothermal subaqueous and subaerial barite (BaSO4) speleothems in Lechuguilla Cave (New Mexico, USA)

International Journal of Speleology, 2020
Barite (BaSO4) speleothems have been reported from caves around the globe and interpreted to have chiefly formed in phreatic, hypogene, hydrothermal settings.
Max Wisshak, Hazel A. Barton, Katey E. Bender, Harvey R. DuChene   +3 more
doaj   +1 more source

Barite mineralization in Kalana speleothems, Central Estonia: Sr, S and O isotope characterization [PDF]

Estonian Journal of Earth Sciences, 2017
Barite mineralization in association with calcitic speleothem precipitates in cave structures in Silurian Aeronian carbonate rocks in Kalana quarry, Central Estonia, was studied. Barite mineralization in Kalana occurs in two generations – euhedral bladed-
Mikk Gaškov, Holar Sepp, Päärn Paiste, Kalle Kirsimäe, Tõnu Pani   +4 more
doaj   +1 more source

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Neutron Shielding Calculation for Barite-Boron-Water

, 2020
Unstable nuclei may emit radiation in order to make transition to stable form. This radiation may also be neutron besides other particles or electromagnetic radiation. Besides using radiation in a variety of different fields, its effect on cells makes it
S. Al-Obaidi, H. Akyildirim, K. Günoğlu, I. Akkurt   +3 more
semanticscholar   +1 more source

Barite–Micromax mixture, an enhanced weighting agent for the elimination of barite sag in invert emulsion drilling fluids

Journal of Petroleum Exploration and Production Technology, 2020
Weighting agents are mixed with the drilling mud to provide the high density required to control high-pressure high-temperature (HPHT) wells throughout the drilling operation. Solids sag occurs when the weighting agent separates from the liquid phase and
S. Basfar, Abdelmjeed Mohamed, S. Elkatatny   +2 more
semanticscholar   +1 more source

Control de vocabulario: orígenes, evolución y proyección

Ciência da Informação, 2015
Las cuestiones relacionadas con el control de vocabulario están fuertemente asentadas en la literatura de la Organización del Conocimiento desde los orígenes mismos de este campo temático.
Mario Barité
doaj  

Effects of Temperature and Particle Size Distribution on Barite Reduction by Carbon monoxide Gas [PDF]

Journal of Particle Science and Technology, 2016
In this research, a mineral barite powder was reduced by carbon monoxide gas and the effects of reduction time and temperature was investigated as well as barite particle size.
Saeed Vakilpour, Ahmad Ghaderi Hamidi
doaj   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, EarlyView.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source

Characterisation of barite bodies from Camal Island (Kenyir Geopark), Terengganu, Malaysia

Bulletin of the Mineral Research and Exploration
The aim of this study is to understand the geological aspect and characterisation of barite bodies in Camal Island, a part of Kenyir National Geopark, in Terengganu state, Malaysia.
Ain Syafika Mat Husin, Dony Adryansyah Nazaruddin, Muhd Nur Ismail Abdul Rahman   +2 more
doaj   +1 more source

Geochemical characteristics of mercurian tetrahedrite, barite and fluorite from the Duboki Vagan, Glumac and Dubrave-Dugi Dol barite deposits, south of Kreševo, Mid-Bosnian Schist Mts.

Geologia Croatica, 2011
The geochemical characteristics of tetrahedrite and barite of the Duboki Vagan barite deposit near the town of Kreševo in the MBSM (Mid-Bosnian Schist Mountains) have been determinated and correlated with the results of previously studied barite ...
Ivan B. Jurković, Vesnica Garašić, Ivan Jurković   +2 more
doaj   +1 more source