File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Three Fe-Ti oxide ore-bearing gabbro-granitoid complexes in the panxi region of the Permian Emeishan large igneous province, SW China

TitleThree Fe-Ti oxide ore-bearing gabbro-granitoid complexes in the panxi region of the Permian Emeishan large igneous province, SW China
Authors
KeywordsA-Type Granites
Emeishan Large Igneous Province
Fe-Ti Oxide Deposit
Fractional Crystallization
Late Permian
Layered Gabbro
Issue Date2011
PublisherAmerican Journal of Science. The Journal's web site is located at http://www.ajsonline.org
Citation
American Journal Of Science, 2011, v. 311 n. 9, p. 773-812 How to Cite?
AbstractThe Permian (∼260 Ma) Emeishan large igneous province of SW China contains three nearly identical gabbro-granitoid complexes that host giant Fe-Ti oxide deposits. The Fe-Ti oxide deposits are within the lower portions of evolved layered gabbroic intrusions and are spatially and temporally associated with A-type granitic plutons. The 264 ± 3Ma Taihe layered gabbroic intrusion hosts a large magmatic Fe-Ti oxide deposit and is coeval with the Taihe peralkaline, A-type granitic pluton, which is dated at 261 ± 2 Ma. Within the A-type granitic pluton are microgranular enclaves, which have compositions intermediate between the gabbro and host granite. Primitive mantle-normalized incompatible element plots show corresponding reciprocal patterns between the mafic and felsic rocks. The chondrite-normalized REE patterns show Eu-anomalies changing from positive (Eu/Eu* = 1.5 to 5.9) in the gabbroic intrusion to negative in the enclaves (Eu/Eu* = 0.4 to 0.6) and granites (Eu/Eu*= 0.2 to 0.5). Whole rock εNd (T) values of the gabbroic intrusion (εNd(T) =+2.5 to +3.3) are similar to those of the enclaves (εNd (T)= +1.0 to 2.0) and granite (εNd (T)= +1.5 to +1.9) whereas the zircon εHf (T) values of the gabbro (εHf (T) = +8.1 ± 0.8) are indistinguishable from those of the granites (εHf (T)= +9.2 ± 1.0), suggesting that the parent magmas for all rock types originated from the same mantle source. Geochemical modeling indicates that the gabbros and granites can be generated by fractional crystallization of a common parental magma similar to high-Ti Emeishan flood basalt. The compositional jump from the gabbro to the enclaves is attributed to the crystallization of Fe-Ti oxide minerals. The results of this study and other studies suggest that the magmatic conditions (for example, pressure, composition, fO 2), which led to the formation of at least three Fe-Ti oxide bearing gabbro-granitoid complexes, were relatively common during the development of the Emeishan large igneous province.
Persistent Identifierhttp://hdl.handle.net/10722/151363
ISSN
2015 Impact Factor: 3.566
2015 SCImago Journal Rankings: 2.104
ISI Accession Number ID
Funding AgencyGrant Number
Chengdu University of Science and Technology
University of Hong Kong
National Taiwan University
National Science CouncilNSC100-2116-M-003-006-MY2
Funding Information:

We would like to thank Eero Hanski and an anonymous reviewer for their constructive comments that helped to improve this manuscript. The authors would like to thank Professor Ma Yuxiao and Mr. Zhao Hao, both from Chengdu University of Science and Technology, for their field support, and Ms. Xiao Fu for her analytical support at the University of Hong Kong. We are grateful to HY Chiu and IJ Lin for their analytical support at National Taiwan University. JGS acknowledges the support from the National Science Council through grant NSC100-2116-M-003-006-MY2.

References

 

DC FieldValueLanguage
dc.contributor.authorShellnutt, JGen_US
dc.contributor.authorWang, KLen_US
dc.contributor.authorZellmer, GFen_US
dc.contributor.authorIizuka, Yen_US
dc.contributor.authorJahn, BMen_US
dc.contributor.authorPang, KNen_US
dc.contributor.authorQi, Len_US
dc.contributor.authorZhou, MFen_US
dc.date.accessioned2012-06-26T06:21:10Z-
dc.date.available2012-06-26T06:21:10Z-
dc.date.issued2011en_US
dc.identifier.citationAmerican Journal Of Science, 2011, v. 311 n. 9, p. 773-812en_US
dc.identifier.issn0002-9599en_US
dc.identifier.urihttp://hdl.handle.net/10722/151363-
dc.description.abstractThe Permian (∼260 Ma) Emeishan large igneous province of SW China contains three nearly identical gabbro-granitoid complexes that host giant Fe-Ti oxide deposits. The Fe-Ti oxide deposits are within the lower portions of evolved layered gabbroic intrusions and are spatially and temporally associated with A-type granitic plutons. The 264 ± 3Ma Taihe layered gabbroic intrusion hosts a large magmatic Fe-Ti oxide deposit and is coeval with the Taihe peralkaline, A-type granitic pluton, which is dated at 261 ± 2 Ma. Within the A-type granitic pluton are microgranular enclaves, which have compositions intermediate between the gabbro and host granite. Primitive mantle-normalized incompatible element plots show corresponding reciprocal patterns between the mafic and felsic rocks. The chondrite-normalized REE patterns show Eu-anomalies changing from positive (Eu/Eu* = 1.5 to 5.9) in the gabbroic intrusion to negative in the enclaves (Eu/Eu* = 0.4 to 0.6) and granites (Eu/Eu*= 0.2 to 0.5). Whole rock εNd (T) values of the gabbroic intrusion (εNd(T) =+2.5 to +3.3) are similar to those of the enclaves (εNd (T)= +1.0 to 2.0) and granite (εNd (T)= +1.5 to +1.9) whereas the zircon εHf (T) values of the gabbro (εHf (T) = +8.1 ± 0.8) are indistinguishable from those of the granites (εHf (T)= +9.2 ± 1.0), suggesting that the parent magmas for all rock types originated from the same mantle source. Geochemical modeling indicates that the gabbros and granites can be generated by fractional crystallization of a common parental magma similar to high-Ti Emeishan flood basalt. The compositional jump from the gabbro to the enclaves is attributed to the crystallization of Fe-Ti oxide minerals. The results of this study and other studies suggest that the magmatic conditions (for example, pressure, composition, fO 2), which led to the formation of at least three Fe-Ti oxide bearing gabbro-granitoid complexes, were relatively common during the development of the Emeishan large igneous province.en_US
dc.languageengen_US
dc.publisherAmerican Journal of Science. The Journal's web site is located at http://www.ajsonline.orgen_US
dc.relation.ispartofAmerican Journal of Scienceen_US
dc.subjectA-Type Granitesen_US
dc.subjectEmeishan Large Igneous Provinceen_US
dc.subjectFe-Ti Oxide Depositen_US
dc.subjectFractional Crystallizationen_US
dc.subjectLate Permianen_US
dc.subjectLayered Gabbroen_US
dc.titleThree Fe-Ti oxide ore-bearing gabbro-granitoid complexes in the panxi region of the Permian Emeishan large igneous province, SW Chinaen_US
dc.typeArticleen_US
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_US
dc.identifier.authorityZhou, MF=rp00844en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.2475/09.2011.02en_US
dc.identifier.scopuseid_2-s2.0-84863229314-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84857823728&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume311en_US
dc.identifier.issue9en_US
dc.identifier.spage773en_US
dc.identifier.epage812en_US
dc.identifier.isiWOS:000300807400002-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridShellnutt, JG=17343022500en_US
dc.identifier.scopusauthoridWang, KL=55060460500en_US
dc.identifier.scopusauthoridZellmer, GF=55058440300en_US
dc.identifier.scopusauthoridIizuka, Y=7101729099en_US
dc.identifier.scopusauthoridJahn, BM=7006657468en_US
dc.identifier.scopusauthoridPang, KN=23493522200en_US
dc.identifier.scopusauthoridQi, L=7202149924en_US
dc.identifier.scopusauthoridZhou, MF=7403506005en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats