| 甘肃北山460金矿埃达克质石英闪长岩地球化学特征及意义 |
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| 引用本文： | 黄增保,魏志军,金霞.甘肃北山460金矿埃达克质石英闪长岩地球化学特征及意义[J].甘肃地质学报,2005,14(2):30-34. |
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| 作者姓名： | 黄增保 魏志军 金霞 |
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| 作者单位： | 甘肃省地质调查院 甘肃兰州730000 |
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| 摘 要： | 460金矿石英闪长岩产出于塔里木板块北缘红石山深大断裂带中。通过对其岩石化学组成的研究表明,主量元素SiO2、Al2O3和MgO的含量分别为56.01%~66.96%、14.54%~16.71%和0.88%~5.70%,微量元素Y、Yb和Sr的含量分别为(4.55~13.7)×10-6(、0.61~1.58)×10-6和(428~884)×10-6,LREE为富集型和Eu为正异常,这些特征反映石英闪长岩为埃达克质岩。综合分析认为是基性下地壳在一定的物理化学条件下部分熔融后直接侵位于近地表而形成的。与本区埃达克岩金矿化存在密切的时空关系。
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| 关 键 词： | 埃达克岩 地球化学 石英闪长岩 甘肃 |
| 文章编号： | 1004-4116（2005）02-0030-0005 |
| 收稿时间： | 2005-03-31 |
THE GEOCHEMICAL CHARACTERISTICS OF MINE ADAKITIC
QUARTZ-DIORITE COMPLEX FROM THE BEISHAN AREA, GANSU
PROVINE AND ITS GEOLOGICAL SIGNIFICANCE |
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| HUANG Zeng-bao,WEI Zhi-jun and JIN-Xia.THE GEOCHEMICAL CHARACTERISTICS OF MINE ADAKITIC
QUARTZ-DIORITE COMPLEX FROM THE BEISHAN AREA, GANSU
PROVINE AND ITS GEOLOGICAL SIGNIFICANCE[J].Acta Geologica Gansu,2005,14(2):30-34. |
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| Authors: | HUANG Zeng-bao WEI Zhi-jun and JIN-Xia |
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| Institution: | (Geological Survey of Gansu Province,Lanzhou 730000,China) |
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| Abstract: | The studied quartz-diorite in the Hong Shishan deeply huge rift-band of the north margin of
Tarim slab, the geological characteristics,petrochemistry and geochemistry,the compositions of SiO2(56·01%~
66·96%),Al2O3(14·54%~16·71%),MgO(0·88%~5·70%),Y(4·55~13·7×10-6),Yb(0·61~1·58×
10-6),Sr(428~884×10-6)and positive Eu anomalies indicate that the plagiogranite porphyry shows character-
istics of adakitic rocks.The former resulted from in partial melting of mantle wedge on the subducting slab,while
the later was formed in direct melting of oceanic plate, the adakitic rocks are spatially and temporally associated
with copper gold. |
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| Keywords: | Adakitic rocks Geochemistry Quartz- diorite Bei Shan gold mine 460 Gansu |
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