NDLI: Interpretation of aeromagnetic anomalies of the Sulu region, eastern China and implications for deep geology

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Interpretation of aeromagnetic anomalies of the Sulu region, eastern China and implications for deep geology

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Frontiers of Earth Science in China : Volume 1, Issue 2, May 2007

Frontiers of Earth Science in China : Volume 1, Issue 1, February 2007

Interpretation of aeromagnetic anomalies of the Sulu region, eastern China and implications for deep geology

Content Provider	Springer Nature Link
Author	Zhao, Sutao Liu, Qingsheng Qiao, Qingqing Fu, Yuanyuan
Copyright Year	2007
Abstract	By using data on the 1:100 000 aeromagnetic anomalies of the Sulu orogenic belt, we designed three simulated geotraverses, in which deep seismic reflection and other geophysical investigations have been completed. Based on the features of magnetism of the three profiles, and under the constraints of deep seismic reflection data, together with the magnetism of the core petrology at the Chinese Continental Scientific Drilling (CCSD) pilot-hole and areal geology, the three inversions of magnetic anomalies are carried out. The characteristics of terrane structure are presented: the rocks are mostly composed of eclogite, marble, and gneiss at the depth of 5 km. At the depth between 5 and 7 km under the surface, inverse magnetic bodies are mainly the ultra high pressure metamorphic (UHPM) rock slices containing a lot of coesite-bearing eclogite. At the depth between 7 km and the bottom of upper crust are the rocks of the gneiss, granite and granite diorite that underwent ultra high pressure metamorphic process. Middle crust (10–19 km) is mostly composed of UHPM gneiss and granite that intruded later. The rocks of acid and basic granulite dominate the lower crust. Based on the inversed results of the three simulated geotraverses, we know that the UHPM rock slices of the three profiles are dipping north, stacking each other and being uplifted to the earth’s surface, which may be the result of the North China craton’s subduction and exhumation in the Triassic.
Starting Page	373
Ending Page	379
Page Count	7
File Format	PDF
ISSN	16737385
Journal	Frontiers of Earth Science in China
Volume Number	1
Issue Number	3
e-ISSN	16737490
Language	English
Publisher	Higher Education Press
Publisher Date	2007-01-01
Publisher Institution	Chinese Universities
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	aeromagnetic anomaly rock magnetism deep geology Sulu orogenic belt Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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