Petrogenesis and metallogenic potential of the Wulanba granite, southern Great Xing'an Range, NE China: constraints from whole-rock and apatite geochemistry
摘要:The Wulanba granite, consisting of biotite monzogranite and syenogranite, is located in the southern part of the Great Xing'an Range, NE China. Whole-rock major- and trace-element geochemistry suggests the Wulanba granite is a high-K-shoshonitic, slightly peraluminous and highly differentiated I-type granite. The Sr-Nd-Hf isotopes indicate that it originated from partial melting of juvenile crust derived from the depleted mantle with a minor input of old crust. The relatively young T-2DM and t(DM2) ages indicate it was most likely derived from a Late Neoproterozoic to Early Palaeozoic source. We have demonstrated that the biotite monzogranite is the ore-related intrusion of the Haobugao Zn-Fe mineralization based on the following geological, geochronological and geochemical evidence: (1) the chalcopyrite/pyrite in the biotite monzogranite and the continuous mineralization of drill core ZK2508; (2) the consistence of the emplacement age of the biotite monzogranite (similar to 141-140/138 Ma) with the skarn mineralization age (similar to 142 Ma); and (3) the presence of rich ore-forming elements (Fe-Zn-Cu) in the biotite monzogranite, and the similar Pb compositions of the sulfides from the Haobugao deposit and the biotite monzogranite. Compared to the barren syenogranite, the fertile biotite monzogranite is more oxidized, while the edges of the apatite grains in the biotite monzogranite are more oxidized than the centres. The average F/Cl ratio of the fertile biotite monzogranite (similar to 123.45) is much higher than that of the barren syenogranite (similar to 73.98). We conclude that these differences reflect unique geochemical signatures, and the geochemical composition of the apatite can be used to infer the economic potential of granites.
关键字:apatite ore-related rock Sr-Nd-Pb-Hf isotopes geochronology Wulanba granite Great Xing'an Range
ISSN号:0016-7568
卷、期、页:卷: 157 期: 3 页: 411-434
发表日期:2020-03-01
影响因子:2.365200
期刊分区(SCI为中科院分区):三区
收录情况:SCI(科学引文索引印刷版),地学领域高质量科技期刊分级目录(国外T2),SCIE(科学引文索引网络版)
发表期刊名称:GEOLOGICAL MAGAZINE
参与作者:Jiang, Si-Hong,Bagas, Leon,Chen, Chun-Liang,Han, Ning
通讯作者:刘源
第一作者:万云洋
论文类型:期刊论文
论文概要:刘源,Jiang, Si-Hong,Bagas, Leon,Chen, Chun-Liang,Han, Ning,万云洋,Petrogenesis and metallogenic potential of the Wulanba granite, southern Great Xing'an Range, NE China: constraints from whole-rock and apatite geochemistry,GEOLOGICAL MAGAZINE,2020,卷: 157 期: 3 页: 411-434
论文题目:Petrogenesis and metallogenic potential of the Wulanba granite, southern Great Xing'an Range, NE China: constraints from whole-rock and apatite geochemistry