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| PubMed | |
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Article by Yu, Y. Q. |
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Article by Guo, S. Y. |
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Article by Wang, L. F. |
���ɹ���ɽ���ո�ɽ��������λ�ڻ�����̨��Ե���Σ���ʯ������ҪΪ���������Һͺ���ĸ�����ҡ�ͨ����ʯ��ѧ�͵���ѧ������������ʯΪ�����Ƽ���ϵ�л����ң����л�������������ƶ���ͻ����ң�����ĸ���������ڸ����ͻ����ҡ��ʯu-Pb����Ϊ(243±3��272±4)Ma������I�ͺ�S������������������컷��Ϊ��ɽ�»������ࡣ���������ɿ���Ϊ�����ڣ����ɹ���ɽ�����ڻ����ҶԸ��������Ԫ�ص����Ƽ����γɾ�����Ҫ���á�
The Haofigeshan granite of Langshan in Inner Mongolia is located in the west part of northern North China platform��where the rocks are mainly granodiorites and biotite granitites in type��Through the analysis of petrochemistry and geochemistry��the rocks are super calcium-aluminate granites��Granodiorites are low potassium granites��and biotite granites are high potassium granites��Zircon U-Pb isotope dating is 243±3—272±4 Ma with the characteristics of I and S-type granites��whose tectonic environment is volcanic arc granites��The major metallogenic belts are Hercynian��and the granitites of Hercynian are important for migration of metal elements and the for— mation of deposit in Langshan of Inner Mongolia.