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Article: Origin of a large breccia-vein system in the Sanerlin uranium deposit, Southern China: A reinterpretation

TitleOrigin of a large breccia-vein system in the Sanerlin uranium deposit, Southern China: A reinterpretation
Authors
KeywordsFluid overpressure
Hydraulic fracturing
Sanerlin uranium deposit
Southern China
Issue Date2002
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htm
Citation
Mineralium Deposita, 2002, v. 37 n. 2, p. 213-225 How to Cite?
AbstractThe early Tertiary Sanerlin uranium deposit is located near the southwestern margin of the Chaling-Yongxing pull-apart basin defined by the Chaling-Yongxing and Chenxian-Linwu sinistral strike-slip faults in southern China. The uranium ores are hosted in 15 breccia-vein bodies, which are separately located in the cores of three secondary anticlines of the Upper Permian Dangchong Formation. Individual breccia-vein bodies are composed of fragments of silicified shale and sandstone from the Dangchong Formation, and quartz veinlets as cements. These fragments, together with quartz veins, form a mosaic texture. Hydrothermal pitchblende is the only commercial uranium mineral, mainly occuring as disseminated grains within quartz veins or coating fragments. Other metallic minerals include molybdenite, pyrite, chalcopyrite, galena, sphalerite, and red microcrystalline hematite. Fluid inclusions in quartz veins have homogenization temperatures ranging from 150 to 280 °C, and calculated salinity values between 5.6 and 13.4 wt% NaCl equivalent. Stable isotope analyses show that the mineralizing fluid was characterized by δ18O values of -2.2 to +2.6% and δDH2O values of -134 to -110%. These analytical data demonstrate that hydrothermal fluids were mainly derived from formation waters (brines) of the Chaling-Yongxing basin. Fluid overpressuring was caused by an abnormal geothermal gradient and impermeable shales in the deposit area. The geometry, texture, and structure of the breccia-vein system, along with the fluid pressure estimates, suggest that hydraulic fracturing generated the mineralized breccia-vein system. Pitchblende and associated minerals were deposited when gaseous phases were released abruptly from the ore fluids due to the hydraulic fracturing.
Persistent Identifierhttp://hdl.handle.net/10722/72448
ISSN
2015 Impact Factor: 3.467
2015 SCImago Journal Rankings: 1.677
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, JWen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorLi, XFen_HK
dc.contributor.authorLi, ZJen_HK
dc.contributor.authorFu, ZRen_HK
dc.date.accessioned2010-09-06T06:41:55Z-
dc.date.available2010-09-06T06:41:55Z-
dc.date.issued2002en_HK
dc.identifier.citationMineralium Deposita, 2002, v. 37 n. 2, p. 213-225en_HK
dc.identifier.issn0026-4598en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72448-
dc.description.abstractThe early Tertiary Sanerlin uranium deposit is located near the southwestern margin of the Chaling-Yongxing pull-apart basin defined by the Chaling-Yongxing and Chenxian-Linwu sinistral strike-slip faults in southern China. The uranium ores are hosted in 15 breccia-vein bodies, which are separately located in the cores of three secondary anticlines of the Upper Permian Dangchong Formation. Individual breccia-vein bodies are composed of fragments of silicified shale and sandstone from the Dangchong Formation, and quartz veinlets as cements. These fragments, together with quartz veins, form a mosaic texture. Hydrothermal pitchblende is the only commercial uranium mineral, mainly occuring as disseminated grains within quartz veins or coating fragments. Other metallic minerals include molybdenite, pyrite, chalcopyrite, galena, sphalerite, and red microcrystalline hematite. Fluid inclusions in quartz veins have homogenization temperatures ranging from 150 to 280 °C, and calculated salinity values between 5.6 and 13.4 wt% NaCl equivalent. Stable isotope analyses show that the mineralizing fluid was characterized by δ18O values of -2.2 to +2.6% and δDH2O values of -134 to -110%. These analytical data demonstrate that hydrothermal fluids were mainly derived from formation waters (brines) of the Chaling-Yongxing basin. Fluid overpressuring was caused by an abnormal geothermal gradient and impermeable shales in the deposit area. The geometry, texture, and structure of the breccia-vein system, along with the fluid pressure estimates, suggest that hydraulic fracturing generated the mineralized breccia-vein system. Pitchblende and associated minerals were deposited when gaseous phases were released abruptly from the ore fluids due to the hydraulic fracturing.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htmen_HK
dc.relation.ispartofMineralium Depositaen_HK
dc.subjectFluid overpressureen_HK
dc.subjectHydraulic fracturingen_HK
dc.subjectSanerlin uranium depositen_HK
dc.subjectSouthern Chinaen_HK
dc.titleOrigin of a large breccia-vein system in the Sanerlin uranium deposit, Southern China: A reinterpretationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0026-4598&volume=37&spage=213&epage=225&date=2002&atitle=Origin+of+a+large+breccia-vein+system+in+the+Sanerlin+uranium+deposit,+Southern+China:+a+reinterpretationen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00126-001-0221-zen_HK
dc.identifier.scopuseid_2-s2.0-0036203731en_HK
dc.identifier.hkuros71241en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036203731&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue2en_HK
dc.identifier.spage213en_HK
dc.identifier.epage225en_HK
dc.identifier.isiWOS:000177382800006-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridLi, JW=36063037900en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridLi, XF=26661069800en_HK
dc.identifier.scopusauthoridLi, ZJ=7409080919en_HK
dc.identifier.scopusauthoridFu, ZR=7403347778en_HK

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