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Article: Geochemistry of the Late Jurassic granitoids in the northern end area of Da Hinggan Mountains and their geological and prospecting implications
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TitleGeochemistry of the Late Jurassic granitoids in the northern end area of Da Hinggan Mountains and their geological and prospecting implications
 
AuthorsWu, G3
Chen, YJ3 4
Sun, FY1
Li, JC2
Li, ZT2
Wang, XJ2
 
KeywordsAdakite
Collisional Crust Thickening
Da Hinggan Mountains
Geochemistry
Late Jurassic
 
Issue Date2008
 
PublisherKexue Chubanshe
 
CitationActa Petrologica Sinica, 2008, v. 24 n. 4, p. 899-910 [How to Cite?]
 
AbstractThe Late Jurassic Longgouhe and Ershiyizhan intrusions, located in the Upper Heilongjiang Basin of northern Da Hinggan Mountains, are closely related to the porphyry Cu-Au mineralizations.. The intrusions are mainly composed of quartz diorite, quartz monzodiorite and granodiorite. Most of them are the rocks of high-K calc-alkaline series, with minor of shoshonite series. Their SiO2 and Al2O3 contents range 61.37% - 66.59% and 15.35% - 17.06%, respectively. The MgO content ranges 2.02% - 3.47%, with a high Mg# index ranging from 44 to 59. The (La/Yb)N and δEu values range from 16.85 to 81.73 and from 0.68 to 0.93, respectively, showing strongly fractionated REE patterns that are similar to those of adakites. The rocks are enriched in Ba, Sr and LREE, but strongly depleted in Nb and Ta, and slightly depleted in Rb and Ti. The Yb and Y contents span of 0.31 - 1.32 μg/g and 4.32 - 12.07 μg/g, respectively, suggesting that the rocks are depleted in Yb and Y. The Sr /Y ratios are between 67.74 and 220.60, showing a clear feature of low-Y and high-Sr. All these geochemical characteristics are similar to adakites. Considering that the Paleo-Asian Ocean and Mongol-Okhotsk Ocean were closed in the Late Paleozoic and Permian-Middle Jurassic, respectively, the origin of the interested adakites can be related to partial melting of delaminated crust which were thickened by the collisional orogeny between the Siberia and Mongol-Sinokorea continents.
 
ISSN1000-0569
2013 Impact Factor: 1.224
2013 SCImago Journal Rankings: 0.806
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorWu, G
 
dc.contributor.authorChen, YJ
 
dc.contributor.authorSun, FY
 
dc.contributor.authorLi, JC
 
dc.contributor.authorLi, ZT
 
dc.contributor.authorWang, XJ
 
dc.date.accessioned2010-09-17T10:34:31Z
 
dc.date.available2010-09-17T10:34:31Z
 
dc.date.issued2008
 
dc.description.abstractThe Late Jurassic Longgouhe and Ershiyizhan intrusions, located in the Upper Heilongjiang Basin of northern Da Hinggan Mountains, are closely related to the porphyry Cu-Au mineralizations.. The intrusions are mainly composed of quartz diorite, quartz monzodiorite and granodiorite. Most of them are the rocks of high-K calc-alkaline series, with minor of shoshonite series. Their SiO2 and Al2O3 contents range 61.37% - 66.59% and 15.35% - 17.06%, respectively. The MgO content ranges 2.02% - 3.47%, with a high Mg# index ranging from 44 to 59. The (La/Yb)N and δEu values range from 16.85 to 81.73 and from 0.68 to 0.93, respectively, showing strongly fractionated REE patterns that are similar to those of adakites. The rocks are enriched in Ba, Sr and LREE, but strongly depleted in Nb and Ta, and slightly depleted in Rb and Ti. The Yb and Y contents span of 0.31 - 1.32 μg/g and 4.32 - 12.07 μg/g, respectively, suggesting that the rocks are depleted in Yb and Y. The Sr /Y ratios are between 67.74 and 220.60, showing a clear feature of low-Y and high-Sr. All these geochemical characteristics are similar to adakites. Considering that the Paleo-Asian Ocean and Mongol-Okhotsk Ocean were closed in the Late Paleozoic and Permian-Middle Jurassic, respectively, the origin of the interested adakites can be related to partial melting of delaminated crust which were thickened by the collisional orogeny between the Siberia and Mongol-Sinokorea continents.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationActa Petrologica Sinica, 2008, v. 24 n. 4, p. 899-910 [How to Cite?]
 
dc.identifier.epage910
 
dc.identifier.issn1000-0569
2013 Impact Factor: 1.224
2013 SCImago Journal Rankings: 0.806
 
dc.identifier.issue4
 
dc.identifier.scopuseid_2-s2.0-49149089695
 
dc.identifier.spage899
 
dc.identifier.urihttp://hdl.handle.net/10722/92047
 
dc.identifier.volume24
 
dc.languageeng
 
dc.publisherKexue Chubanshe
 
dc.relation.ispartofActa Petrologica Sinica
 
dc.relation.referencesReferences in Scopus
 
dc.subjectAdakite
 
dc.subjectCollisional Crust Thickening
 
dc.subjectDa Hinggan Mountains
 
dc.subjectGeochemistry
 
dc.subjectLate Jurassic
 
dc.titleGeochemistry of the Late Jurassic granitoids in the northern end area of Da Hinggan Mountains and their geological and prospecting implications
 
dc.typeArticle
 
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<contributor.author>Li, ZT</contributor.author>
<contributor.author>Wang, XJ</contributor.author>
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<description.abstract>The Late Jurassic Longgouhe and Ershiyizhan intrusions, located in the Upper Heilongjiang Basin of northern Da Hinggan Mountains, are closely related to the porphyry Cu-Au mineralizations.. The intrusions are mainly composed of quartz diorite, quartz monzodiorite and granodiorite. Most of them are the rocks of high-K calc-alkaline series, with minor of shoshonite series. Their SiO2 and Al2O3 contents range 61.37% - 66.59% and 15.35% - 17.06%, respectively. The MgO content ranges 2.02% - 3.47%, with a high Mg# index ranging from 44 to 59. The (La/Yb)N and &#948;Eu values range from 16.85 to 81.73 and from 0.68 to 0.93, respectively, showing strongly fractionated REE patterns that are similar to those of adakites. The rocks are enriched in Ba, Sr and LREE, but strongly depleted in Nb and Ta, and slightly depleted in Rb and Ti. The Yb and Y contents span of 0.31 - 1.32 &#956;g/g and 4.32 - 12.07 &#956;g/g, respectively, suggesting that the rocks are depleted in Yb and Y. The Sr /Y ratios are between 67.74 and 220.60, showing a clear feature of low-Y and high-Sr. All these geochemical characteristics are similar to adakites. Considering that the Paleo-Asian Ocean and Mongol-Okhotsk Ocean were closed in the Late Paleozoic and Permian-Middle Jurassic, respectively, the origin of the interested adakites can be related to partial melting of delaminated crust which were thickened by the collisional orogeny between the Siberia and Mongol-Sinokorea continents.</description.abstract>
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Author Affiliations
  1. Jilin University
  2. Shenyang Center China Geological Survey
  3. Guangzhou Institute of Geochemistry Chinese Academy of Sciences
  4. Peking University