Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China
The Dongxiang tungsten–copper deposit is a large W–Cu deposit located in the northeast of Jiangxi province in south China. Previous studies have mainly considered the geochemical and isotopic attributes of the ore deposit, but information is still lacking on the genesis and setting of Dongxiang W–Cu...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/13/3/380 |
| _version_ | 1797609986575040512 |
|---|---|
| author | Yitao Cai Pei Ni Guoguang Wang Hui Chen |
| author_facet | Yitao Cai Pei Ni Guoguang Wang Hui Chen |
| author_sort | Yitao Cai |
| collection | DOAJ |
| description | The Dongxiang tungsten–copper deposit is a large W–Cu deposit located in the northeast of Jiangxi province in south China. Previous studies have mainly considered the geochemical and isotopic attributes of the ore deposit, but information is still lacking on the genesis and setting of Dongxiang W–Cu mineralization-related intrusive rocks. This paper presents systematic elements and Sr–Nd–Hf isotopic data of the Dongxiang granodiorite porphyry. The Dongxiang granodiorite porphyry is intermediate–acidic in composition, with SiO<sub>2</sub> contents of 60.00–75.16 wt.%, Al<sub>2</sub>O<sub>3</sub> contents of 10.15–18.53 wt.%, an K<sub>2</sub>O contents of 2.95–4.28 wt.%. The REEs content ranges from 64.2 to 198.1 ppm, with LREE/HREE ratios of 7.67–17.47. It is characterized by adakitic geochemical affinities with high Sr/Y and (La/Yb)<sub>N</sub> ratios but low Y and Yb contents. A slight Eu anomaly, extreme depletion in Y and Yb, relatively low MgO content, and relatively high <sup>207</sup>Pb/<sup>204</sup>Pb ratios together indicate that the Dongxiang granodiorite porphyry was likely derived from partial melting of the thickened lower continental crust. Based on zircon ε<sub>Hf</sub>(t) values (−11.8–−4.5), two-stage Hf model ages (1.33–1.94 Ga), and the regional geological setting, it can be inferred that Dongxiang granodiorite porphyry magma is mainly derived from Neoproterozoic juvenile crust with the involvement of Paleoproterozoic ancient crust. |
| first_indexed | 2024-03-11T06:08:07Z |
| format | Article |
| id | doaj.art-3836412b5126494f8fcc1543b6f952dc |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T06:08:07Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-3836412b5126494f8fcc1543b6f952dc2023-11-17T12:47:47ZengMDPI AGMinerals2075-163X2023-03-0113338010.3390/min13030380Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE ChinaYitao Cai0Pei Ni1Guoguang Wang2Hui Chen3School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, ChinaState Key Laboratory for Mineral Deposits Research, Institute of Geo-Fluid Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, ChinaState Key Laboratory for Mineral Deposits Research, Institute of Geo-Fluid Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, ChinaDevelopment Research Center, China Geological Survey, Beijing 100037, ChinaThe Dongxiang tungsten–copper deposit is a large W–Cu deposit located in the northeast of Jiangxi province in south China. Previous studies have mainly considered the geochemical and isotopic attributes of the ore deposit, but information is still lacking on the genesis and setting of Dongxiang W–Cu mineralization-related intrusive rocks. This paper presents systematic elements and Sr–Nd–Hf isotopic data of the Dongxiang granodiorite porphyry. The Dongxiang granodiorite porphyry is intermediate–acidic in composition, with SiO<sub>2</sub> contents of 60.00–75.16 wt.%, Al<sub>2</sub>O<sub>3</sub> contents of 10.15–18.53 wt.%, an K<sub>2</sub>O contents of 2.95–4.28 wt.%. The REEs content ranges from 64.2 to 198.1 ppm, with LREE/HREE ratios of 7.67–17.47. It is characterized by adakitic geochemical affinities with high Sr/Y and (La/Yb)<sub>N</sub> ratios but low Y and Yb contents. A slight Eu anomaly, extreme depletion in Y and Yb, relatively low MgO content, and relatively high <sup>207</sup>Pb/<sup>204</sup>Pb ratios together indicate that the Dongxiang granodiorite porphyry was likely derived from partial melting of the thickened lower continental crust. Based on zircon ε<sub>Hf</sub>(t) values (−11.8–−4.5), two-stage Hf model ages (1.33–1.94 Ga), and the regional geological setting, it can be inferred that Dongxiang granodiorite porphyry magma is mainly derived from Neoproterozoic juvenile crust with the involvement of Paleoproterozoic ancient crust.https://www.mdpi.com/2075-163X/13/3/380granodiorite porphyryadakitic rockW–Cu depositDongxiangsoutheast China |
| spellingShingle | Yitao Cai Pei Ni Guoguang Wang Hui Chen Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China Minerals granodiorite porphyry adakitic rock W–Cu deposit Dongxiang southeast China |
| title | Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China |
| title_full | Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China |
| title_fullStr | Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China |
| title_full_unstemmed | Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China |
| title_short | Geochemical Characteristics of the Granodiorite Porphyry in Dongxiang W-Cu Deposit, SE China |
| title_sort | geochemical characteristics of the granodiorite porphyry in dongxiang w cu deposit se china |
| topic | granodiorite porphyry adakitic rock W–Cu deposit Dongxiang southeast China |
| url | https://www.mdpi.com/2075-163X/13/3/380 |
| work_keys_str_mv | AT yitaocai geochemicalcharacteristicsofthegranodioriteporphyryindongxiangwcudepositsechina AT peini geochemicalcharacteristicsofthegranodioriteporphyryindongxiangwcudepositsechina AT guoguangwang geochemicalcharacteristicsofthegranodioriteporphyryindongxiangwcudepositsechina AT huichen geochemicalcharacteristicsofthegranodioriteporphyryindongxiangwcudepositsechina |