China's First Independent Cobalt Deposit and its Metallogenic Mechanism: Evidence from Fluid Inclusions and Isotopic Geochemistry
Identifieur interne : 000531 ( Main/Exploration ); précédent : 000530; suivant : 000532China's First Independent Cobalt Deposit and its Metallogenic Mechanism: Evidence from Fluid Inclusions and Isotopic Geochemistry
Auteurs : Feng Chengyou [République populaire de Chine] ; Qi Feng [République populaire de Chine] ; Zhang Dequan [République populaire de Chine] ; Li Daxin [République populaire de Chine] ; She Hongquan [République populaire de Chine]Source :
- Acta Geologica Sinica ‐ English Edition [ 1000-9515 ] ; 2011-12.
English descriptors
- KwdEn :
Abstract
The Tuolugou cobalt deposit is the first independent large‐scale Co‐ and Au‐bearing deposit discovered in northwestern China. It is located in the eastern Kunlun orogenic belt in Qinghai Province, and occurs conformably in low‐grade metamorphic volcano‐sedimentary rock series with well‐developed Na‐rich hydrothermal sedimentary rocks and typical hydrothermal sedimentary ore fabrics. Fluid inclusions and isotopic geochemistry studies suggest that cobalt mineralizing fluid is dominated by NaCl‐H2O system, accompanied by NaCl‐CO2‐H2O‐N2 system responsible for gold mineralization. Massive, banded and disseminated pyrite ores have similar compositions of He and Ar isotopes from the mineralizing fluid, with 3He/4He range between 0.10 to 0.31Ra (averaging 0.21Ra), and 40Ar/36Ar between 302 and 569 (averaging 373), which reflects that Co mineralizing fluids derived dominantly from meteoric water deeply circulating. δ34S values of pyrite approaches to zero (δ34S ranging from –4.5‰ to +1.5‰, centering around ‐1.8‰ to ‐0.2‰), reflecting its deep source. Ore lead is characterized by distinctly high radiogenesis, with 206Pb/204Pb>19.279, 207Pb/204Pb>15.691 and 208Pb/204Pb>39.627, and its values show an increase trend from country rocks, regional Paleozoic volcanic rocks to ores. This may have suggested that high radiogentic ore Pb derived mainly from country rocks by leaching meteoric water‐dominated hydrothermal fluid during its circulation at depth. Cobalt occurs mainly in sulfide phase (such as pyrite), but cobalt enrichment, and presence and increasing contents of Co‐bearing minerals have a positive correlation with metamorphic degree. The Tuolugou deposit and other typical strata‐bound Co‐Cu‐Au deposits have striking similarities in the geological features and metallogenic pattern of primary cobalt All of them are syngenetic hydrothermal exhalative sedimentation in origin.
Url:
DOI: 10.1111/j.1755-6724.2011.00595.x
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000187
- to stream Istex, to step Curation: 000028
- to stream Istex, to step Checkpoint: 000148
- to stream Main, to step Merge: 000533
- to stream Main, to step Curation: 000531
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">China's First Independent Cobalt Deposit and its Metallogenic Mechanism: Evidence from Fluid Inclusions and Isotopic Geochemistry</title><author><name sortKey="Chengyou, Feng" sort="Chengyou, Feng" uniqKey="Chengyou F" first="Feng" last="Chengyou">Feng Chengyou</name></author><author><name sortKey="Feng, Qi" sort="Feng, Qi" uniqKey="Feng Q" first="Qi" last="Feng">Qi Feng</name></author><author><name sortKey="Dequan, Zhang" sort="Dequan, Zhang" uniqKey="Dequan Z" first="Zhang" last="Dequan">Zhang Dequan</name></author><author><name sortKey="Daxin, Li" sort="Daxin, Li" uniqKey="Daxin L" first="Li" last="Daxin">Li Daxin</name></author><author><name sortKey="Hongquan, She" sort="Hongquan, She" uniqKey="Hongquan S" first="She" last="Hongquan">She Hongquan</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:7C3EB960B4A0916953FF5BD17611B0E025340CBB</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1111/j.1755-6724.2011.00595.x</idno><idno type="url">https://api.istex.fr/document/7C3EB960B4A0916953FF5BD17611B0E025340CBB/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000187</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000187</idno><idno type="wicri:Area/Istex/Curation">000028</idno><idno type="wicri:Area/Istex/Checkpoint">000148</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000148</idno><idno type="wicri:doubleKey">1000-9515:2011:Chengyou F:china:s:first</idno><idno type="wicri:Area/Main/Merge">000533</idno><idno type="wicri:Area/Main/Curation">000531</idno><idno type="wicri:Area/Main/Exploration">000531</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">China's First Independent Cobalt Deposit and its Metallogenic Mechanism: Evidence from Fluid Inclusions and Isotopic Geochemistry</title><author><name sortKey="Chengyou, Feng" sort="Chengyou, Feng" uniqKey="Chengyou F" first="Feng" last="Chengyou">Feng Chengyou</name><affiliation wicri:level="4"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>School of Earth and Space Sciences, Peking University, Beijing 100871</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName><orgName type="university">Université de Pékin</orgName><placeName><settlement type="city">Pékin</settlement><region type="capitale">Pékin</region></placeName></affiliation><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources; Institute of Mineral Resources, CAGS, Beijing 100037</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">République populaire de Chine</country></affiliation></author><author><name sortKey="Feng, Qi" sort="Feng, Qi" uniqKey="Feng Q" first="Qi" last="Feng">Qi Feng</name><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources; Institute of Mineral Resources, CAGS, Beijing 100037</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Dequan, Zhang" sort="Dequan, Zhang" uniqKey="Dequan Z" first="Zhang" last="Dequan">Zhang Dequan</name><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources; Institute of Mineral Resources, CAGS, Beijing 100037</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Daxin, Li" sort="Daxin, Li" uniqKey="Daxin L" first="Li" last="Daxin">Li Daxin</name><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources; Institute of Mineral Resources, CAGS, Beijing 100037</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author><author><name sortKey="Hongquan, She" sort="Hongquan, She" uniqKey="Hongquan S" first="She" last="Hongquan">She Hongquan</name><affiliation wicri:level="1"><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Key Laboratory of Metallogeny and Mineral Resource Assessment, Ministry of Land and Resources; Institute of Mineral Resources, CAGS, Beijing 100037</wicri:regionArea><placeName><settlement type="city">Pékin</settlement></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Acta Geologica Sinica ‐ English Edition</title><idno type="ISSN">1000-9515</idno><idno type="eISSN">1755-6724</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-12">2011-12</date><biblScope unit="volume">85</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="1403">1403</biblScope><biblScope unit="page" to="1418">1418</biblScope></imprint><idno type="ISSN">1000-9515</idno></series><idno type="istex">7C3EB960B4A0916953FF5BD17611B0E025340CBB</idno><idno type="DOI">10.1111/j.1755-6724.2011.00595.x</idno><idno type="ArticleID">ACGS595</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1000-9515</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>SEDEX</term><term>Tuolugou in Qinghai Province</term><term>cobalt deposit</term><term>eastern Kunlun orogenic belt</term><term>fluid inclusion</term><term>isotopic geochemistry</term><term>metallogenic mechanism</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The Tuolugou cobalt deposit is the first independent large‐scale Co‐ and Au‐bearing deposit discovered in northwestern China. It is located in the eastern Kunlun orogenic belt in Qinghai Province, and occurs conformably in low‐grade metamorphic volcano‐sedimentary rock series with well‐developed Na‐rich hydrothermal sedimentary rocks and typical hydrothermal sedimentary ore fabrics. Fluid inclusions and isotopic geochemistry studies suggest that cobalt mineralizing fluid is dominated by NaCl‐H2O system, accompanied by NaCl‐CO2‐H2O‐N2 system responsible for gold mineralization. Massive, banded and disseminated pyrite ores have similar compositions of He and Ar isotopes from the mineralizing fluid, with 3He/4He range between 0.10 to 0.31Ra (averaging 0.21Ra), and 40Ar/36Ar between 302 and 569 (averaging 373), which reflects that Co mineralizing fluids derived dominantly from meteoric water deeply circulating. δ34S values of pyrite approaches to zero (δ34S ranging from –4.5‰ to +1.5‰, centering around ‐1.8‰ to ‐0.2‰), reflecting its deep source. Ore lead is characterized by distinctly high radiogenesis, with 206Pb/204Pb>19.279, 207Pb/204Pb>15.691 and 208Pb/204Pb>39.627, and its values show an increase trend from country rocks, regional Paleozoic volcanic rocks to ores. This may have suggested that high radiogentic ore Pb derived mainly from country rocks by leaching meteoric water‐dominated hydrothermal fluid during its circulation at depth. Cobalt occurs mainly in sulfide phase (such as pyrite), but cobalt enrichment, and presence and increasing contents of Co‐bearing minerals have a positive correlation with metamorphic degree. The Tuolugou deposit and other typical strata‐bound Co‐Cu‐Au deposits have striking similarities in the geological features and metallogenic pattern of primary cobalt All of them are syngenetic hydrothermal exhalative sedimentation in origin.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country><region><li>Pékin</li></region><settlement><li>Pékin</li></settlement><orgName><li>Université de Pékin</li></orgName></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Chengyou, Feng" sort="Chengyou, Feng" uniqKey="Chengyou F" first="Feng" last="Chengyou">Feng Chengyou</name></noRegion><name sortKey="Chengyou, Feng" sort="Chengyou, Feng" uniqKey="Chengyou F" first="Feng" last="Chengyou">Feng Chengyou</name><name sortKey="Chengyou, Feng" sort="Chengyou, Feng" uniqKey="Chengyou F" first="Feng" last="Chengyou">Feng Chengyou</name><name sortKey="Daxin, Li" sort="Daxin, Li" uniqKey="Daxin L" first="Li" last="Daxin">Li Daxin</name><name sortKey="Dequan, Zhang" sort="Dequan, Zhang" uniqKey="Dequan Z" first="Zhang" last="Dequan">Zhang Dequan</name><name sortKey="Feng, Qi" sort="Feng, Qi" uniqKey="Feng Q" first="Qi" last="Feng">Qi Feng</name><name sortKey="Hongquan, She" sort="Hongquan, She" uniqKey="Hongquan S" first="She" last="Hongquan">She Hongquan</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000531 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000531 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= CobaltMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:7C3EB960B4A0916953FF5BD17611B0E025340CBB
|texte= China's First Independent Cobalt Deposit and its Metallogenic Mechanism: Evidence from Fluid Inclusions and Isotopic Geochemistry
}}
| This area was generated with Dilib version V0.6.32. |  |