A study of extension of Lianhuashan fault in Guangdong to adjacent marine space based on remote sensing and aeromagnetic data

doi:10.6046/gtzyyg.2019.01.32

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Abstract

Studies suggest that Lianhuashan fault has extended to marine space. Based on remote sensing image interpretation using terrestrial ETM+ data and structural characteristics of aeromagnetic deduced faults in marine space, the authors analyzed sedimentary control of the Lianhuashan fault on the Pearl River Mouth Basin. On the one hand, the result of remote sensing interpretation shows that Lianhuashan fault zone presents a NE-trending fascicular linear feature with two branches extending into the sea in SW direction. The main fault belt is a mountain with low hills and plains on both sides characterized by steepness in the east and gentleness in the west. The authors found that the NE-trending straight line river is developed along the fault zone, and the eastern side of mountains develops deep "V" ravines, vertical cliffs or fault triangles. On the other hand, the magnetic field feature reveals that the branch has extended to the north of Pearl River Mouth Basin and the south branch has passed through Pearl River Mouth Basin to the south of Hainan Island. Magmatic activity is developed obviously along the fault belt. The Lianhuashan fault zone is the dividing line of different magnetic fields, which dominate the NEE-trending basement structure of the Pearl River Mouth Basin with deep source magma activity. It is the first stage deep fault in the Pearl River Mouth Basin.

Keywords remote sensing image magnetic field Lianhuashan fault Pearl River Mouth basin

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Issue Date: 14 March 2019

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	Lingyan XIA
	Changsong LIN
	Xiao LI
	Yue HU

Cite this article:

Lingyan XIA,Changsong LIN,Xiao LI, et al. A study of extension of Lianhuashan fault in Guangdong to adjacent marine space based on remote sensing and aeromagnetic data[J]. Remote Sensing for Land & Resources, 2019, 31(1): 247-254.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2019.01.32 OR https://www.gtzyyg.com/EN/Y2019/V31/I1/247

Fig.1 Simplified regional tectonic map of the Lianhuashan fault zone in Guangdong Province

Tab.1 Data features of Landsat ETM+

Fig.2 ETM+ image and remote sensing interpretation of linear and circular structures for the Lianhuashan fault zone in Guangdong Province

Fig.3 Field photo of the north main branch of Lianhuashan fault

Fig.4 Field photo of Lianhuashan fault and rock instrusion

Fig.5 Granite remote sensing image features of Huangpu Town

Fig.6 Magnetic anomaly of the northern South China Sea and neighboring areas

Fig.7 RTP magnetic anomaly of the northern South China Sea and neighboring areas

Fig.8 Upward continuation of RTP magnetic anomaly (height 10 km)of the northern South China Sea and neighboring areas

Fig.9 Magnetic basement distribution of the Pearl River Mouth Basin

Fig.10 Characteristics of the Lianhuashan fault of the Pearl River Mouth Basin(for the location,see Fig.9)

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