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Article: Fluid inclusion constraints on the origin of the Zhaiwa Mo deposit, Luoning county, Henan Province

TitleFluid inclusion constraints on the origin of the Zhaiwa Mo deposit, Luoning county, Henan Province
Authors
KeywordsEastern Qinling Orogen
Fluid Inclusion
Intrusion-Related Deposit
Ore Geology
Zhaiwa Mo Deposit
Issue Date2008
Citation
Geology in China, 2008, v. 35 n. 6, p. 1250-1266 How to Cite?
AbstractThe Zhaiwa Mo deposit, in Luoning county, Henan province, is located in the Xiong'er Terrane in southern margin of North China Craton. Its ore bodies, occurring as lode, are hosted in biotite-amphibole-plagiogneiss of the Taihua Group and controlled by subsidiary faults of the Machaying fault which is the south boundary fault of the Xiong'er terrane. Three stages of hydrothermal ore - forming process are recognized, Quartz-molybdenite (I), which is the main metallogenic stage, Quartz-polymetallic sulfide (II) and Quartz-carbonate (III). Two types of fluid inclusions, i.e. H2O-NaCl, daughter mineral-bearing, are observed. Laser-Raman spectrum showing that the most important component of fluid inclusion is water. From early to late stages, homogeneous temperatures of fluid inclusions change from 100-260 °C (I), through 110-160°C (II), to 120-180°C (III), this showing that the Zhaiwa Mo deposit belongs to low-temperature hydrothermal deposit; salinities change from 2-25 wt%NaCl.eqv(I), through 6-30 wt%NaCl.eqv (II), and to 7-25 wt%NaCl.eqv(III). The broad range of homogeneous temperatures of stage I, the evolution of salinities from bimodal to unimodal, and negative correlation between homogeneous temperatures and salinities indicate that fluid mixing is the most important metallogenic mechanism in Zhaiwa Mo deposit. The characteristic of fluid inclusion in Zhaiwa Mo deposit are high density, high salinities and low temperature, which is the result of CaCl2-bearing fluid involved in ore forming process, the mixing of hot magmatic fluid and cold CaCl2-bearing brine result to precipitation of molybdenite. In summary, The geological and fluid inclusions features of the Zhaiwa Mo deposit are similar to intrusion-related deposit, we affirm that the Zhaiwa Mo deposit is a intrusion-related Mo deposit.
Persistent Identifierhttp://hdl.handle.net/10722/92110
ISSN
2015 SCImago Journal Rankings: 0.428
References

 

DC FieldValueLanguage
dc.contributor.authorDeng, X-Hen_HK
dc.contributor.authorChen, Y-Jen_HK
dc.contributor.authorYao, J-Men_HK
dc.contributor.authorLi, W-Ben_HK
dc.contributor.authorLi, Nen_HK
dc.contributor.authorWang, Yen_HK
dc.contributor.authorMi, Men_HK
dc.contributor.authorZhang, Yen_HK
dc.date.accessioned2010-09-17T10:36:22Z-
dc.date.available2010-09-17T10:36:22Z-
dc.date.issued2008en_HK
dc.identifier.citationGeology in China, 2008, v. 35 n. 6, p. 1250-1266en_HK
dc.identifier.issn1000-3657en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92110-
dc.description.abstractThe Zhaiwa Mo deposit, in Luoning county, Henan province, is located in the Xiong'er Terrane in southern margin of North China Craton. Its ore bodies, occurring as lode, are hosted in biotite-amphibole-plagiogneiss of the Taihua Group and controlled by subsidiary faults of the Machaying fault which is the south boundary fault of the Xiong'er terrane. Three stages of hydrothermal ore - forming process are recognized, Quartz-molybdenite (I), which is the main metallogenic stage, Quartz-polymetallic sulfide (II) and Quartz-carbonate (III). Two types of fluid inclusions, i.e. H2O-NaCl, daughter mineral-bearing, are observed. Laser-Raman spectrum showing that the most important component of fluid inclusion is water. From early to late stages, homogeneous temperatures of fluid inclusions change from 100-260 °C (I), through 110-160°C (II), to 120-180°C (III), this showing that the Zhaiwa Mo deposit belongs to low-temperature hydrothermal deposit; salinities change from 2-25 wt%NaCl.eqv(I), through 6-30 wt%NaCl.eqv (II), and to 7-25 wt%NaCl.eqv(III). The broad range of homogeneous temperatures of stage I, the evolution of salinities from bimodal to unimodal, and negative correlation between homogeneous temperatures and salinities indicate that fluid mixing is the most important metallogenic mechanism in Zhaiwa Mo deposit. The characteristic of fluid inclusion in Zhaiwa Mo deposit are high density, high salinities and low temperature, which is the result of CaCl2-bearing fluid involved in ore forming process, the mixing of hot magmatic fluid and cold CaCl2-bearing brine result to precipitation of molybdenite. In summary, The geological and fluid inclusions features of the Zhaiwa Mo deposit are similar to intrusion-related deposit, we affirm that the Zhaiwa Mo deposit is a intrusion-related Mo deposit.en_HK
dc.languageengen_HK
dc.relation.ispartofGeology in Chinaen_HK
dc.subjectEastern Qinling Orogenen_HK
dc.subjectFluid Inclusionen_HK
dc.subjectIntrusion-Related Depositen_HK
dc.subjectOre Geologyen_HK
dc.subjectZhaiwa Mo Depositen_HK
dc.titleFluid inclusion constraints on the origin of the Zhaiwa Mo deposit, Luoning county, Henan Provinceen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-64349121052en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-64349121052&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume35en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1250en_HK
dc.identifier.epage1266en_HK

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