نتایج جستجو برای: mineralogical composition

تعداد نتایج: 263021  

Journal: :Matica Srpska Journal for Natural Sciences 2003

2009
N. Schiavon

The chemicalmineralogical composition of the sand fractions of mortars found in Roman villas dating from the 1 st century A.C. located in Northern Italy has been investigated by optical microscopy, scanning electron microscopy plus energy dispersive spectroscopy microanalysis and x-ray diffractometry. The petrographic results on the mortar samples have been compared with mineralogical data avai...

پورکاسب, هوشنگ, خیاط نیکنام, شراره , زراسوندی, علیرضا , ویسه, سهراب ,

This study focuses on the mineralogical and chemical characterization of Mishan Formation marls from North East Ahvaz for brick production. Mineralogical and Geochemical studies were performed by XRD and XRF methods. Major minerals in marls are quartz, calcite, dolomite and the minor minerals are orthoclase, chlorite, and muscovite. Illite and montmorillonite are also present as minor minerals ...

2003
A. Gendrin S. Erard

Introduction: In the study presented here, a technique based on the wavelet transform and described in the accompanying abstract ([1]) is applied to the nearinfrared spectra of Phobos obtained by ISM in 1989 from the Phobos-2 spacecraft. Small mineralogical variations are observed across the red, optically altered, unit of Phobos. The mineralogical composition appears to comprise olivine in the...

2016
James Cassanelli

This paper presents a mineralogical and chemical investigation of shale deposits from the U.S. Gulf coast in order to document the mechanisms and reactions involved in the diagenetic conversion of smectite into illite. Cuttings from the 1,250 to 5,500 m stratigraphic interval of a well were sorted by grain size and analzyed by x-ray diffraction to assess chemical and mineralogical trends with d...

2017
Johann Engelbrecht

The paper presents and analyzes the mineralogical, physical and chemical composition of dust deposited samples at six sites on the KAUST campus. KAUST is located on the Red sea coastal plain of Saudi Arabia. Monthly samples were collected between December 2014 and December 2015. The monthly deposition trends were compared to visibility and sun photometric measurements and to previous mineralogi...

Journal: :Environmental Health Perspectives 1997
G D Guthrie

It has been recognized since at least as early as the mid-1500s that inhaled minerals (i.e., inorganic particles) can pose a risk. Extensive research has focused on the biological mechanisms responsible for asbestos- and silica-induced diseases, but much less attention has been paid to the mineralogical properties and geochemical mechanisms that might influence a mineral's biological activity. ...

1998
Kamal T. Hindy Ashraf R. Baghdady

Deals with a study of the mineralogical and organic components of the monthly dust-fall deposited over Al Ain city, some 150km east of Abu Dhabi and 130km southeast of Dubai. The identification of the mineralogical and organic composition was carried out by means of infrared spectroscopy. This study reveals that the principal constituents of dust-fall over the studied city are calcite, gypsum, ...

2017
Johann Engelbrecht

The paper presents and analyzes the mineralogical, physical and chemical composition of dust deposited samples at six sites on the KAUST campus. KAUST is located on the Red sea coastal plain of Saudi Arabia. Monthly samples were collected between December 2014 and December 2015. The monthly deposition trends were compared to visibility and sun photometric measurements and to previous mineralogi...

2013
U. Böttger

Raman microspectroscopy measurements were performed on Hayabusa sample RA-QD02-0197. The sample has been provided by JAXA to our consortium in the scope of the 1 International Announcement of Opportunity [1]. Raman microspectroscopy is an appropriate technique for a contactless mineralogical investigation and is applied to describe the mineralogical composition of the sample. For the noble gas ...

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