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		<isbn>978-85-17-00088-1</isbn>
		<label>59353</label>
		<citationkey>AsadzadehSouz:2017:CaStQo</citationkey>
		<title>A new insight into microseepage model using detailed spectroscopy: a case study from Qom area, Iran</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<size>4093 KiB</size>
		<author>Asadzadeh, Saeid,</author>
		<author>Souza Filho, Carlos Roberto,</author>
		<electronicmailaddress>saeid@ige.unicamp.br</electronicmailaddress>
		<editor>Gherardi, Douglas Francisco Marcolino,</editor>
		<editor>Aragão, Luiz Eduardo Oliveira e Cruz de,</editor>
		<e-mailaddress>daniela.seki@inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)</conferencename>
		<conferencelocation>Santos</conferencelocation>
		<date>28-31 maio 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>6596-6601</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
		<transferableflag>1</transferableflag>
		<abstract>The near-vertical leakage of light gaseous hydrocarbons (HC) to the surface triggers an array of diagenetic physio-chemical and mineralogical changes in the soils and sediments overlying a HC accumulation. Over years, multi-, and hyperspectral remote sensing has been used to detect the mineralogic footprints of microseepage systems using their diagnostic spectral features in the visible-near infrared (VNIR) and shortwave infrared (SWIR) wavelengths. In practice, however, there has been ambiguities in result interpretation because the diversity and quantity of the target minerals was not well delineated by classic microseepage theory. In this article, we introduce a novel collection of alteration products induced by a microseepage system using detailed examination of 360 hand samples collected on and off the Alborz oil field in Qom area, Iran. Our Lab spectroscopy and follow-up analysis using an in-house spectral processing package named AMISA demonstrated that smectites (montmorillonite, nontronite, and likely palygorskite), chlorite, carbonates (calcite, and probably ankerite), iron oxides/oxyhydroxides (goethite, ferrihydrite, hematite, and possibly maghemite), and sulphates (gypsum and in parts jarosite) are present as diagenetic alteration products over the HC affected zones. The introduced mineralogic assemblage can provide a new insight into microseepage theory that in combination with classic model can set benchmarks for the characterization of microseepage-induced alterations using remote sensing technology.</abstract>
		<area>SRE</area>
		<type>Geologia</type>
		<language>en</language>
		<targetfile>59353.pdf</targetfile>
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