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Progress in Earth and Planetary Science
Fig. 3 | Progress in Earth and Planetary Science

Fig. 3

From: Imaging crustal features and Moho depths through enhancements and inversion of gravity data from the Philippine island arc system

Fig. 3

a Isostatic gravity anomaly map of the Philippines showing the Philippine Mobile Belt (PNB) generally bordered by negative anomalies corresponding to the deep trenches. Traces of major structures (e.g., fault, trench) and features (e.g., Palawan-Mindoro Microcontinental Block, PNB) were overlaid on the map. SBM = Sierra Madre Basin, IR = Isabella Ridge, ELT = East Luzon Trough, BR = Benham Rise, P1 = northern Philippine Trench, P2 = southern Philippine Trench, M1 = northern Manila Trench, M2 = central Manila Trench, M3 = southern Manila Trench, ZOE = Zambales Ophiolite extension, NS = Negros and Sulu Trenches intersection, C = southern Cotabato Trench. b Interpretation of seismic reflection profile across the SMB, IR, and ELT (modified from Hayes and Lewis 1984). The location of the seismic reflection profile is marked by the A–A′

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