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Fig. 5 | Progress in Earth and Planetary Science

Fig. 5

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

Fig. 5

Upward continued maps of the Philippines at 5 and 20 km representing minimum depths of a 2.5 and b 10 km, respectively. a Massive ophiolitic outcrops coincide with very high-gravity anomaly signatures (> 90mGal). Representative ophiolites and ophiolite complexes are labeled on the map: I = Ilocos Norte Ophiolite, ZBL = Zambales Ophiolite Complex, P = Palawan Ophiolite, ZBN = Zamboanga Ophiolite, T = Tacloban Ophiolite Complex, SM = Samar Ophiolite, D = Dinagat Ophiolite, SR = Samar Ophiolite, CM = Central Mindanao Ophiolite. White labels represent the massive magmatic arcs: N = Negros, DR = Daguma Range. White dashed polygons present the four major zones (> 90 mGal) that suggest thicker and more massive ophiolitic basement rocks. b Generally, the central Philippines has lower-gravity anomalies (20–35 mGal) than the rest of the archipelago (45–200 mGal). CP = Central Philippines, LZN = Luzon, MNDN = Mindanao

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