基于重磁异常的嘉偕平顶山群构造区划特征研究

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马涛¹^,²^,³(

), 朱莹洁¹^,²^,³^,⁴, 杨永⁵^,⁶, 纪晓琳¹^,²^,³, 王丁丁¹^,²^,³, 刘金兰¹^,²^,³, 王万银¹^,²^,³(

)

Research on tectonic division in Jiaxie guyots based on gravity and magnetic anomalies

Tao MA¹^,²^,³(

), Ying-Jie ZHU¹^,²^,³^,⁴, Yong YANG⁵^,⁶, Xiao-Lin JI¹^,²^,³, Ding-Ding WANG¹^,²^,³, Jin-Lan LIU¹^,²^,³, Wan-Yin WANG¹^,²^,³(

)

图12. 岩石圈分层条件下火山带形成的地球动力学模型^[5]
1—岩石圈水平滑动面和特定的岩屑层;2—岩石圈下部的走滑断层;3—潜在走滑断层;4—雁行状短岩线;5—减压作用下形成的岩浆室;6—充当岩浆通道的右旋和左旋走滑断层对角线系统;7—岩石圈下部的走滑断层在深海板块表面的投影;8—深海板块中的走滑断层;9—软流圈镁铁质岩石和流体沿岩石圈下部走滑断层的上升;10—物质从岩浆室向深海板块表面的传递

Fig.12. Geodynamic model of volcanic belt formation under conditions of the delaminated lithosphere^[5]
1—surfaces of horizontal slip of the lithosphere and particular lithic sheets; 2—strike-slip faults in the lower lithosphere; 3—potential strike-slip fault; 4—expressed as en echelon brachyanticlines; 5—magma chambers formed beneath brachyanticlines under decompression; 6—diagonal systems of dextral and sinistral strike-slip faults in brachyanticlines that served as magma conduits; 7—projection of a strikeslip fault in the lower lithosphere on the surface of an abyssal plate; 8—strike-slip fault in the abyssal plate; 9—ascent of asthenospheric mafic rocks and fluids along the strike-slip faults in the lower lithosphere; 10—farther propagation of matter from a magma chamber toward the surface of an abyssal plate