Details

Autor(en) / Beteiligte

• Fan, P-F
• Valencia, MJ

Titel

Geology and Bouguer anomalies of Hainan Island and vicinity

Erscheinungsjahr

1985

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• Northern Hainan Island is part of the Caledonian Cathysian fold system. Central and southern Hainan Island are part of the Variscan southeast maritime terrane. During Late Triassic-Jurassic time (the Indo-Sinian Movement), the Mekong foldbelt collided with the Yangtze terrane. Five Bouguer anomaly zones are recognized on Hainan Island. The anomalies in northern and northeastern Hainan Island reflect the thickness of Neogene and Quaternary sediments there, and anomalies in central, northwestern, and southeastern Hainan Island reflect the Variscan tectonic pattern of the region. The Bouguer anomalies increase southward from -20 mgal along the coast to +50 mgal near the edge of the continental shelf, and from +50 mgal to +220 mgal from the continental slope to the abyssal basin.