皖南竹溪岭花岗闪长岩的岩浆源区:来自矿物学、地球化学证据
P588.11%P595; 皖南竹溪岭钨多金属矿床位于江南古陆东缘,与成矿密切相关的岩石主要为花岗闪长岩.针对花岗闪长岩开展岩相学、矿物学和岩石地球化学研究.结果 表明:花岗闪长岩SiO2含量(质量分数,下同)为64.67％～67.33％,Al2O3为15.26％～16.26％,MgO为1.09％～1.37％、K2O/Na2O值高于1.1,A/CNK值为1.00～1.04,为高钾钙碱性、弱过铝质花岗岩;花岗闪长岩富集Rb、K等元素,亏损Nb、Ta、Zr和Ti等元素,稀土元素总合量为(90.40～166.94)×10-6,LREE/HREE值为7.15～15.16,(La/Yb)N值为11.60...
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| Published in | 地球科学与环境学报 Vol. 41; no. 2; pp. 141 - 155 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
长安大学地球科学与资源学院,陕西西安,710054%长安大学地球科学与资源学院,陕西西安710054
01.03.2019
长安大学成矿作用及其动力学实验室,陕西西安 710054%安徽省地质矿产勘查局332地质队,安徽黄山,245000%长安大学地球科学与资源学院,陕西西安710054 昆明理工大学国土资源工程学院,云南昆明 650093 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1672-6561 |
| DOI | 10.3969/j.issn.1672-6561.2019.02.002 |
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| Abstract | P588.11%P595; 皖南竹溪岭钨多金属矿床位于江南古陆东缘,与成矿密切相关的岩石主要为花岗闪长岩.针对花岗闪长岩开展岩相学、矿物学和岩石地球化学研究.结果 表明:花岗闪长岩SiO2含量(质量分数,下同)为64.67％～67.33％,Al2O3为15.26％～16.26％,MgO为1.09％～1.37％、K2O/Na2O值高于1.1,A/CNK值为1.00～1.04,为高钾钙碱性、弱过铝质花岗岩;花岗闪长岩富集Rb、K等元素,亏损Nb、Ta、Zr和Ti等元素,稀土元素总合量为(90.40～166.94)×10-6,LREE/HREE值为7.15～15.16,(La/Yb)N值为11.60～37.32,表现为轻稀土元素富集的右倾配分模式;根据全岩锆石饱和温度计和黑云母的化学成分,测算花岗闪长岩成岩温度为720℃～780℃,成岩压力为73～169MPa,侵位深度为2.75～6.39 km,成岩时氧逸度为-17.52～-10.09.综上所述,竹溪岭花岗闪长岩属于I型花岗岩,形成于中—高温、富水、较高氧逸度的环境下,其形成可能与古太平洋俯冲板片撕裂而形成的近EW向板片窗有关. |
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| AbstractList | P588.11%P595; 皖南竹溪岭钨多金属矿床位于江南古陆东缘,与成矿密切相关的岩石主要为花岗闪长岩.针对花岗闪长岩开展岩相学、矿物学和岩石地球化学研究.结果 表明:花岗闪长岩SiO2含量(质量分数,下同)为64.67％～67.33％,Al2O3为15.26％～16.26％,MgO为1.09％～1.37％、K2O/Na2O值高于1.1,A/CNK值为1.00～1.04,为高钾钙碱性、弱过铝质花岗岩;花岗闪长岩富集Rb、K等元素,亏损Nb、Ta、Zr和Ti等元素,稀土元素总合量为(90.40～166.94)×10-6,LREE/HREE值为7.15～15.16,(La/Yb)N值为11.60～37.32,表现为轻稀土元素富集的右倾配分模式;根据全岩锆石饱和温度计和黑云母的化学成分,测算花岗闪长岩成岩温度为720℃～780℃,成岩压力为73～169MPa,侵位深度为2.75～6.39 km,成岩时氧逸度为-17.52～-10.09.综上所述,竹溪岭花岗闪长岩属于I型花岗岩,形成于中—高温、富水、较高氧逸度的环境下,其形成可能与古太平洋俯冲板片撕裂而形成的近EW向板片窗有关. |
| Author | 闫盼盼 梁婷 鲁麟 孔志岗 徐生发 金修勇 |
| AuthorAffiliation | 长安大学地球科学与资源学院,陕西西安,710054%长安大学地球科学与资源学院,陕西西安710054;长安大学成矿作用及其动力学实验室,陕西西安 710054%安徽省地质矿产勘查局332地质队,安徽黄山,245000%长安大学地球科学与资源学院,陕西西安710054;昆明理工大学国土资源工程学院,云南昆明 650093 |
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| Author_FL | KONG Zhi-gang XU Sheng-fa YAN Pan-pan LIANG Ting LU Lin JIN Xiu-yong |
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| DocumentTitle_FL | Tracer Origin of Zhuxiling Granodiorite in the Southern Anhui, China: Evidence from Mineralogical and Geochemical Characteristics |
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| Keywords | 氧逸度 地球化学 岩石学 花岗闪长岩 岩石成因 矿物学 成岩作用 安徽 |
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| Title | 皖南竹溪岭花岗闪长岩的岩浆源区:来自矿物学、地球化学证据 |
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