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Biogeochemical exploration for massive sulphide deposits in areas of dense vegetation: an orientation survey around the Kanköy Deposit (Trabzon, northeastern Turkey)

Identifieur interne : 001454 ( Istex/Corpus ); précédent : 001453; suivant : 001455

Biogeochemical exploration for massive sulphide deposits in areas of dense vegetation: an orientation survey around the Kanköy Deposit (Trabzon, northeastern Turkey)

Auteurs : M. Akçay ; A. Lerm ; A. Van

Source :

RBID : ISTEX:36414466FCF0E6C26FDEE216B6EBDFC9A8083E33

Abstract

The eastern Pontides region is a mountainous terrain favourable for massive sulphide deposits. Besides the known deposits, it is highly likely that there are others to be discovered. This paper, therefore, describes the results of a soil and biogeochemical sampling program to assess the suitability of biogeochemical methods for the exploration of hidden deposits in temperate terrains. Soil sampling in the Pontides is shown to be a reliable follow-up method. It produced a significant geochemical response characterised by extensive Cu and Zn but localised Pb anomalies. Lead therefore is the element which can be used to pinpoint the mineralisation due to its relatively less mobile character. Hydromorphic dispersion enhanced the anomalies indicating that base of slope samples would produce reliable results. Of the plant species sampled, Corylus avellana (hazelnut tree) with deep penetrating roots shows comparable results to soil sampling and could be used to delineate the mineralisation. Rhododendron luteum may also be of help. In both species Pb shows limited dispersion and accumulates in the plants near the mineralised site whereas Cu and Zn tend to move away downslope. This shows that biogeochemical sampling could, with proper attention to species selection, be successfully used as an alternative method in the search of massive sulphide deposits in mountainous terrains with a high rainfall such as the eastern Pontides.

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DOI: 10.1016/S0375-6742(98)00051-X

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ISTEX:36414466FCF0E6C26FDEE216B6EBDFC9A8083E33

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<note type="content">Fig. 1: Geological map of the area around the Kanköy occurrence. The inlet map shows the location of the study area. Modified after Yılmaz (1988).</note>
<note type="content">Fig. 2: A cross-section showing the geological structure of the Kanköy occurrence as inferred from drill holes.</note>
<note type="content">Fig. 3: Contour diagrams showing the distribution of Cu, Pb and Zn in soil samples.</note>
<note type="content">Fig. 4: Contour diagrams showing the distribution of Cu, Pb and Zn in Rhododendron ponticum.</note>
<note type="content">Fig. 5: Contour diagrams showing the distribution of Cu, Pb and Zn in Rhododendron luteum.</note>
<note type="content">Fig. 6: Contour diagrams showing the distribution of Cu, Pb and Zn in Corylus avellana.</note>
<note type="content">Table 1: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in soil samples</note>
<note type="content">Table 2: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Rhododendron ponticum</note>
<note type="content">Table 3: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Rhododendron luteum</note>
<note type="content">Table 4: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Corylus avellana (hazelnut tree)</note>
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<abstract lang="en">The eastern Pontides region is a mountainous terrain favourable for massive sulphide deposits. Besides the known deposits, it is highly likely that there are others to be discovered. This paper, therefore, describes the results of a soil and biogeochemical sampling program to assess the suitability of biogeochemical methods for the exploration of hidden deposits in temperate terrains. Soil sampling in the Pontides is shown to be a reliable follow-up method. It produced a significant geochemical response characterised by extensive Cu and Zn but localised Pb anomalies. Lead therefore is the element which can be used to pinpoint the mineralisation due to its relatively less mobile character. Hydromorphic dispersion enhanced the anomalies indicating that base of slope samples would produce reliable results. Of the plant species sampled, Corylus avellana (hazelnut tree) with deep penetrating roots shows comparable results to soil sampling and could be used to delineate the mineralisation. Rhododendron luteum may also be of help. In both species Pb shows limited dispersion and accumulates in the plants near the mineralised site whereas Cu and Zn tend to move away downslope. This shows that biogeochemical sampling could, with proper attention to species selection, be successfully used as an alternative method in the search of massive sulphide deposits in mountainous terrains with a high rainfall such as the eastern Pontides.</abstract>
<note type="content">Fig. 1: Geological map of the area around the Kanköy occurrence. The inlet map shows the location of the study area. Modified after Yılmaz (1988).</note>
<note type="content">Fig. 2: A cross-section showing the geological structure of the Kanköy occurrence as inferred from drill holes.</note>
<note type="content">Fig. 3: Contour diagrams showing the distribution of Cu, Pb and Zn in soil samples.</note>
<note type="content">Fig. 4: Contour diagrams showing the distribution of Cu, Pb and Zn in Rhododendron ponticum.</note>
<note type="content">Fig. 5: Contour diagrams showing the distribution of Cu, Pb and Zn in Rhododendron luteum.</note>
<note type="content">Fig. 6: Contour diagrams showing the distribution of Cu, Pb and Zn in Corylus avellana.</note>
<note type="content">Table 1: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in soil samples</note>
<note type="content">Table 2: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Rhododendron ponticum</note>
<note type="content">Table 3: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Rhododendron luteum</note>
<note type="content">Table 4: Basic descriptive statistics and correlation coefficients of Cu, Pb and Zn in samples from Corylus avellana (hazelnut tree)</note>
<subject>
<genre>Keywords</genre>
<topic>biogeochemical exploration</topic>
<topic>eastern Pontides</topic>
<topic>massive sulphide deposits</topic>
<topic>Trabzon</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Journal of Geochemical Exploration</title>
</titleInfo>
<titleInfo type="abbreviated">
<title>GEXPLO</title>
</titleInfo>
<genre type="journal">journal</genre>
<originInfo>
<dateIssued encoding="w3cdtf">199810</dateIssued>
</originInfo>
<identifier type="ISSN">0375-6742</identifier>
<identifier type="PII">S0375-6742(00)X0023-4</identifier>
<part>
<date>199810</date>
<detail type="volume">
<number>63</number>
<caption>vol.</caption>
</detail>
<detail type="issue">
<number>3</number>
<caption>no.</caption>
</detail>
<extent unit="issue pages">
<start>153</start>
<end>254</end>
</extent>
<extent unit="pages">
<start>173</start>
<end>187</end>
</extent>
</part>
</relatedItem>
<identifier type="istex">36414466FCF0E6C26FDEE216B6EBDFC9A8083E33</identifier>
<identifier type="DOI">10.1016/S0375-6742(98)00051-X</identifier>
<identifier type="PII">S0375-6742(98)00051-X</identifier>
<accessCondition type="use and reproduction" contentType="copyright">©1998 Elsevier Science B.V.</accessCondition>
<recordInfo>
<recordContentSource>ELSEVIER</recordContentSource>
<recordOrigin>Elsevier Science B.V., ©1998</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
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   |texte=   Biogeochemical exploration for massive sulphide deposits in areas of dense vegetation: an orientation survey around the Kanköy Deposit (Trabzon, northeastern Turkey)
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