| 铜陵中生代中酸性侵入岩特征及成因 |
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| 关键词:high-K calc-alkaline series shoshonitic series intrusive rock origin Tongling |
| 基金项目:国家自然科学基金项目(批准号:49772106) |
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| 摘要: |
| Origin and Features of the Mesozoic Intermediate-acid Intrusive in the Tongling Area, Anhui, China |
| The Mesozoic intermediate-acid intrusive rocks in Tongling area can be divided into two magmatic series, namely the shoshonitic series and the high-potassium (K) calc-alkaline series. The shoshonitic series is characterized by an association of pyroxene monzodiorites+monzodiorites+quartz monzonites, the Rittmann indices of these rocks are greater than 4 (ranging from 4.2 to 5.8), the total of rare earth elements (ΣREE) ranges from 210×10 -6 to 260×10 -6,and has good relationship with gold deposits. The high-potassium calc-alkaline series is by an association of diorite+quartz monzodiorites+granodiorites, the Rittmann indices are less than 4 (1.8～3.2),ΣREE 130×10 -6～180×10 -6,and has good relationship with copper deposits. Together lithoenclave study, it can be concluded that the shoshonitic series magma is derived from the differentiation of the alkaline basic magma in mantle and the high-potassium (K) calc-alkaline series magma is mixture between the differentiated mantle magma and crustal magma. |
| WU Cai-lai,CHEN Song-yong,SHI Ren-deng,HAO Mei-ying.2003.Origin and Features of the Mesozoic Intermediate-acid Intrusive in the Tongling Area, Anhui, China[J].Acta Geoscientica Sinica,24(1):41-48. |
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