File Download
 
Links for fulltext
(May Require Subscription)
 
Supplementary

Article: The early cretaceous Yangzhaiyu lode gold deposit, north China craton: A link between craton reactivation and gold veining
  • Basic View
  • Metadata View
  • XML View
TitleThe early cretaceous Yangzhaiyu lode gold deposit, north China craton: A link between craton reactivation and gold veining
 
AuthorsLi, JW2
Li, ZK4
Zhou, MF2
Chen, L2
Bi, SJ2
Deng, XD2
Qiu, HN5
Cohen, B3
Selby, D1
Zhao, XF4
 
Issue Date2012
 
PublisherSociety of Economic Geologists, Inc.. The Journal's web site is located at http://www.segweb.org/publications/journal.aspx
 
CitationEconomic Geology, 2012, v. 107 n. 1, p. 43-79 [How to Cite?]
DOI: http://dx.doi.org/10.2113/econgeo.107.1.43
 
AbstractThe Yangzhaiyu gold deposit is one of numerous lode gold deposits in the Xiaoqinling district, southern margin of the North China Craton. Gold mineralization is hosted in Neoarchean to early Paleoproterozoic amphibolite facies metamorphic rocks and consists of auriferous quartz veins and subordinate disseminated ores in the vein-proximal alteration zone. Ore-related hydrothermal alteration is dominated by sericite + quartz + sulfide assemblages close to gold veins, and biotite + quartz + pyrite ± chlorite ± epidote alteration generally distal from mineralization. Pyrite is the predominant sulfide mineral, locally coexisting with minor amounts of chalcopyrite, sphalerite, and galena. Gold occurs mostly as free gold enclosed in or filling microfractures of pyrite and quartz and is also present in equilibrium with Au-bearing tellurides, mainly petzite and calaverite coexisting with hessite, tellurobismuthite, and altaite. Fluid inclusion studies suggest that gold veins were deposited at intermediate temperatures (175°-313°C) from aqueous or aqueous-carbonic fluids with moderate salinity (5.14 wt% NaCl equiv). δ 34S values of sulfide minerals range mainly from 2.0 to 4.4%, whereas auriferous quartz vein samples have δ18O values of 12.4 to 9.6%, with calculated δ 18OH 2O values of 6.0 to 3.2%. Gold-related pyrite grains yield elevated 3He/ 4He ratios (1.51-0.32 Ra) relative to crustal reservoirs and mantle-like 20Ne/ 22Ne and 21Ne/ 22Ne ratios (9.90-9.68 and 0.029, respectively). The stable and noble gas isotopes thus suggest deep-seated, most likely magmatic and mantle-derived, sources for the ore fluids, sulfur and, by inference, other components in the ore system. 40Ar/ 39Ar dating of ore-related sericite and biotite separates indicates two episodes of gold genesis at 134.5 to 132.3 and 124.3 to 123.7 Ma. The mineralization ages overlap zircon U-Pb ages of 141.0 ± 1.6 to 125.8 ± 1.4 Ma (2σ) for the Wenyu and Niangniangshan monzogranite Plutons and a number of mafic to intermediate dikes intruding these Plutons, all being proximal to the Yangzhaiyu gold deposit. The synchronism of gold genesis and magmatism provides additional weights of evidence for a magmatic derivation of ore fluids and sulfur. The geochronologic data also suggest that gold veining took place billions of years after the stabilization of the North China Craton and associated metamorphism in the Late Archean to early Paleoproterozoic. This contrasts sharply to lode gold deposits in other Precambrian cratons that formed predominantly in Late Archean to Paleoproterozoic, temporarily and genetically related to regional high-grade metamorphism and compressional or transpressional tectonism. Available data have demonstrated that the North China Craton was reactivated in the late Mesozoic, as marked by voluminous igneous rocks, faulted-basin formation, high crustal heat flow, and widespread metamorphic core complexes in the eastern part of the craton. It is thus suggested that the Yangzhaiyu gold deposit, together with other deposits of similar ages in the Xiaoqinling district, were products of this craton reactivation event. Lithospheric extension and extensive magmatism related to the craton reactivation may have provided sufficient heat energy, fluid, and sulfur required for the formation of the gold deposits. © 2012 Society of Economic Geologists, Inc.
 
ISSN0361-0128
2013 Impact Factor: 2.270
2013 SCImago Journal Rankings: 2.271
 
DOIhttp://dx.doi.org/10.2113/econgeo.107.1.43
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorLi, JW
 
dc.contributor.authorLi, ZK
 
dc.contributor.authorZhou, MF
 
dc.contributor.authorChen, L
 
dc.contributor.authorBi, SJ
 
dc.contributor.authorDeng, XD
 
dc.contributor.authorQiu, HN
 
dc.contributor.authorCohen, B
 
dc.contributor.authorSelby, D
 
dc.contributor.authorZhao, XF
 
dc.date.accessioned2012-06-26T06:21:02Z
 
dc.date.available2012-06-26T06:21:02Z
 
dc.date.issued2012
 
dc.description.abstractThe Yangzhaiyu gold deposit is one of numerous lode gold deposits in the Xiaoqinling district, southern margin of the North China Craton. Gold mineralization is hosted in Neoarchean to early Paleoproterozoic amphibolite facies metamorphic rocks and consists of auriferous quartz veins and subordinate disseminated ores in the vein-proximal alteration zone. Ore-related hydrothermal alteration is dominated by sericite + quartz + sulfide assemblages close to gold veins, and biotite + quartz + pyrite ± chlorite ± epidote alteration generally distal from mineralization. Pyrite is the predominant sulfide mineral, locally coexisting with minor amounts of chalcopyrite, sphalerite, and galena. Gold occurs mostly as free gold enclosed in or filling microfractures of pyrite and quartz and is also present in equilibrium with Au-bearing tellurides, mainly petzite and calaverite coexisting with hessite, tellurobismuthite, and altaite. Fluid inclusion studies suggest that gold veins were deposited at intermediate temperatures (175°-313°C) from aqueous or aqueous-carbonic fluids with moderate salinity (5.14 wt% NaCl equiv). δ 34S values of sulfide minerals range mainly from 2.0 to 4.4%, whereas auriferous quartz vein samples have δ18O values of 12.4 to 9.6%, with calculated δ 18OH 2O values of 6.0 to 3.2%. Gold-related pyrite grains yield elevated 3He/ 4He ratios (1.51-0.32 Ra) relative to crustal reservoirs and mantle-like 20Ne/ 22Ne and 21Ne/ 22Ne ratios (9.90-9.68 and 0.029, respectively). The stable and noble gas isotopes thus suggest deep-seated, most likely magmatic and mantle-derived, sources for the ore fluids, sulfur and, by inference, other components in the ore system. 40Ar/ 39Ar dating of ore-related sericite and biotite separates indicates two episodes of gold genesis at 134.5 to 132.3 and 124.3 to 123.7 Ma. The mineralization ages overlap zircon U-Pb ages of 141.0 ± 1.6 to 125.8 ± 1.4 Ma (2σ) for the Wenyu and Niangniangshan monzogranite Plutons and a number of mafic to intermediate dikes intruding these Plutons, all being proximal to the Yangzhaiyu gold deposit. The synchronism of gold genesis and magmatism provides additional weights of evidence for a magmatic derivation of ore fluids and sulfur. The geochronologic data also suggest that gold veining took place billions of years after the stabilization of the North China Craton and associated metamorphism in the Late Archean to early Paleoproterozoic. This contrasts sharply to lode gold deposits in other Precambrian cratons that formed predominantly in Late Archean to Paleoproterozoic, temporarily and genetically related to regional high-grade metamorphism and compressional or transpressional tectonism. Available data have demonstrated that the North China Craton was reactivated in the late Mesozoic, as marked by voluminous igneous rocks, faulted-basin formation, high crustal heat flow, and widespread metamorphic core complexes in the eastern part of the craton. It is thus suggested that the Yangzhaiyu gold deposit, together with other deposits of similar ages in the Xiaoqinling district, were products of this craton reactivation event. Lithospheric extension and extensive magmatism related to the craton reactivation may have provided sufficient heat energy, fluid, and sulfur required for the formation of the gold deposits. © 2012 Society of Economic Geologists, Inc.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationEconomic Geology, 2012, v. 107 n. 1, p. 43-79 [How to Cite?]
DOI: http://dx.doi.org/10.2113/econgeo.107.1.43
 
dc.identifier.doihttp://dx.doi.org/10.2113/econgeo.107.1.43
 
dc.identifier.epage79
 
dc.identifier.hkuros206530
 
dc.identifier.issn0361-0128
2013 Impact Factor: 2.270
2013 SCImago Journal Rankings: 2.271
 
dc.identifier.issue1
 
dc.identifier.scopuseid_2-s2.0-84862929851
 
dc.identifier.spage43
 
dc.identifier.urihttp://hdl.handle.net/10722/151354
 
dc.identifier.volume107
 
dc.languageeng
 
dc.publisherSociety of Economic Geologists, Inc.. The Journal's web site is located at http://www.segweb.org/publications/journal.aspx
 
dc.publisher.placeUnited States
 
dc.relation.ispartofEconomic Geology
 
dc.relation.referencesReferences in Scopus
 
dc.titleThe early cretaceous Yangzhaiyu lode gold deposit, north China craton: A link between craton reactivation and gold veining
 
dc.typeArticle
 
<?xml encoding="utf-8" version="1.0"?>
<item><contributor.author>Li, JW</contributor.author>
<contributor.author>Li, ZK</contributor.author>
<contributor.author>Zhou, MF</contributor.author>
<contributor.author>Chen, L</contributor.author>
<contributor.author>Bi, SJ</contributor.author>
<contributor.author>Deng, XD</contributor.author>
<contributor.author>Qiu, HN</contributor.author>
<contributor.author>Cohen, B</contributor.author>
<contributor.author>Selby, D</contributor.author>
<contributor.author>Zhao, XF</contributor.author>
<date.accessioned>2012-06-26T06:21:02Z</date.accessioned>
<date.available>2012-06-26T06:21:02Z</date.available>
<date.issued>2012</date.issued>
<identifier.citation>Economic Geology, 2012, v. 107 n. 1, p. 43-79</identifier.citation>
<identifier.issn>0361-0128</identifier.issn>
<identifier.uri>http://hdl.handle.net/10722/151354</identifier.uri>
<description.abstract>The Yangzhaiyu gold deposit is one of numerous lode gold deposits in the Xiaoqinling district, southern margin of the North China Craton. Gold mineralization is hosted in Neoarchean to early Paleoproterozoic amphibolite facies metamorphic rocks and consists of auriferous quartz veins and subordinate disseminated ores in the vein-proximal alteration zone. Ore-related hydrothermal alteration is dominated by sericite + quartz + sulfide assemblages close to gold veins, and biotite + quartz + pyrite &#177; chlorite &#177; epidote alteration generally distal from mineralization. Pyrite is the predominant sulfide mineral, locally coexisting with minor amounts of chalcopyrite, sphalerite, and galena. Gold occurs mostly as free gold enclosed in or filling microfractures of pyrite and quartz and is also present in equilibrium with Au-bearing tellurides, mainly petzite and calaverite coexisting with hessite, tellurobismuthite, and altaite. Fluid inclusion studies suggest that gold veins were deposited at intermediate temperatures (175&#176;-313&#176;C) from aqueous or aqueous-carbonic fluids with moderate salinity (5.14 wt% NaCl equiv). &#948; 34S values of sulfide minerals range mainly from 2.0 to 4.4%, whereas auriferous quartz vein samples have &#948;18O values of 12.4 to 9.6%, with calculated &#948; 18OH 2O values of 6.0 to 3.2%. Gold-related pyrite grains yield elevated 3He/ 4He ratios (1.51-0.32 Ra) relative to crustal reservoirs and mantle-like 20Ne/ 22Ne and 21Ne/ 22Ne ratios (9.90-9.68 and 0.029, respectively). The stable and noble gas isotopes thus suggest deep-seated, most likely magmatic and mantle-derived, sources for the ore fluids, sulfur and, by inference, other components in the ore system. 40Ar/ 39Ar dating of ore-related sericite and biotite separates indicates two episodes of gold genesis at 134.5 to 132.3 and 124.3 to 123.7 Ma. The mineralization ages overlap zircon U-Pb ages of 141.0 &#177; 1.6 to 125.8 &#177; 1.4 Ma (2&#963;) for the Wenyu and Niangniangshan monzogranite Plutons and a number of mafic to intermediate dikes intruding these Plutons, all being proximal to the Yangzhaiyu gold deposit. The synchronism of gold genesis and magmatism provides additional weights of evidence for a magmatic derivation of ore fluids and sulfur. The geochronologic data also suggest that gold veining took place billions of years after the stabilization of the North China Craton and associated metamorphism in the Late Archean to early Paleoproterozoic. This contrasts sharply to lode gold deposits in other Precambrian cratons that formed predominantly in Late Archean to Paleoproterozoic, temporarily and genetically related to regional high-grade metamorphism and compressional or transpressional tectonism. Available data have demonstrated that the North China Craton was reactivated in the late Mesozoic, as marked by voluminous igneous rocks, faulted-basin formation, high crustal heat flow, and widespread metamorphic core complexes in the eastern part of the craton. It is thus suggested that the Yangzhaiyu gold deposit, together with other deposits of similar ages in the Xiaoqinling district, were products of this craton reactivation event. Lithospheric extension and extensive magmatism related to the craton reactivation may have provided sufficient heat energy, fluid, and sulfur required for the formation of the gold deposits. &#169; 2012 Society of Economic Geologists, Inc.</description.abstract>
<language>eng</language>
<publisher>Society of Economic Geologists, Inc.. The Journal&apos;s web site is located at http://www.segweb.org/publications/journal.aspx</publisher>
<relation.ispartof>Economic Geology</relation.ispartof>
<title>The early cretaceous Yangzhaiyu lode gold deposit, north China craton: A link between craton reactivation and gold veining</title>
<type>Article</type>
<description.nature>link_to_subscribed_fulltext</description.nature>
<identifier.doi>10.2113/econgeo.107.1.43</identifier.doi>
<identifier.scopus>eid_2-s2.0-84862929851</identifier.scopus>
<identifier.hkuros>206530</identifier.hkuros>
<relation.references>http://www.scopus.com/mlt/select.url?eid=2-s2.0-84855890469&amp;selection=ref&amp;src=s&amp;origin=recordpage</relation.references>
<identifier.volume>107</identifier.volume>
<identifier.issue>1</identifier.issue>
<identifier.spage>43</identifier.spage>
<identifier.epage>79</identifier.epage>
<publisher.place>United States</publisher.place>
</item>
Author Affiliations
  1. University of Durham
  2. China University of Geosciences
  3. University of Queensland
  4. The University of Hong Kong
  5. Guangzhou Institute of Geochemistry Chinese Academy of Sciences