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| Keywords | |
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North China Plate |
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continental margin |
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Xiaotazigou rock group |
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New Archean |
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geological impli- cations |
| Authors | |
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YANG Zhong-Jie |
| PubMed | |
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Article by Yang, Z. J. |
��ecovery of New Archean Xiaotazigou rock group in middle sector of northern margin of North China Plate and its geological implications
YANG Zhong-Jie
Geological Survey Institute of Liaoning Province��Shenyang 110031��China
The Archean terrain of the northern margin of the North China Plate��as a part of primary Jianping Group��is composed of discontinuous supracrustal rocks and other metamorphic plutonic rocks�� The primary rock of discontinuous supracrustal rocks is a formation containing silico- ferric basic volcanic rock and volcanic sedimentary rock and it is a relic of the ancient greenstone in high- grade metamorphism region�� It experienced transformation and metamorphism caused by drastic orogeny in the Late Archean�� In the regional geological survey of 1�� 250 000 Fuxin and Anshan sheets��the field geological investigation��research of lithostratigraphy��and orogenic belt stratig- raphy��isotope dating��primary rock formation and geochemistry are applied to separate the metamorphic supracrust- al rocks in medium and deep level in the studied area from the primary Jianping Group of Archean and set up the Xiaotazigou ��ock Group��classified into the New Archean��