Geochemical Characteristics of Xinjing Adakitic Quartz-diorite Complex from the Beishan Area, Gansu Provine and Its Geological Significance

QI Ruirong; LEI Zhicai; HUANG Zengbao

Northwestern Geology > 2016 > 49(2): 134-140.

QI Ruirong, LEI Zhicai, HUANG Zengbao. Geochemical Characteristics of Xinjing Adakitic Quartz-diorite Complex from the Beishan Area, Gansu Provine and Its Geological Significance[J]. Northwestern Geology, 2016, 49(2): 134-140.

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Geochemical Characteristics of Xinjing Adakitic Quartz-diorite Complex from the Beishan Area, Gansu Provine and Its Geological Significance

1. No. 4 Geological Surveuy Party, Gansu Bureau of Geology and Minetal Resource Expioration, Jiuquan 735000, Gansu, China;
2. Geological Survey of Gansu Province, Lanzhou 730000, Gansu, China

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Received Date: November 18, 2015
Revised Date: January 01, 2016
Available Online: July 28, 2022
Published Date: June 04, 2016

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Abstract

Abstract

The Xinjing quartz-diorite, lies in the Beishan area, Gansu Province, is occurred in the Paleozoic Beishan island arc belt. The results of petrochemistry show that, the contents of SiO₂, Al₂O₃ and MgO are (59.13%~67.90%), (14.90%~16.42%) and (1.96%~3.12%), respectively, while the values of trace elements (such as Y, Yb and Sr) are (11×10^-6~22.8×10^-6), (1.19×10^-6~2.33×10^-6) and (364×10^-6~871×10^-6), and these rocks show positive Eu anomalies, indicating that the plagiogranite porphyry shows characteristics of adakitic rocks.These adakitic rocks were formed by the partial melting of subducting slab with MORB features under some physical and chemical conditions, and then they were directly emplaced to the near surface. Thus, these adakitic rocks have close spatial temporal relationship with gold mineralization in this studying area.
- adakitic rocks,
- geochemistry,
- quartz-diorite,
- Gansu

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Geochemical Characteristics of Xinjing Adakitic Quartz-diorite Complex from the Beishan Area, Gansu Provine and Its Geological Significance

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