{'fraction_non_alphanumeric': 0.016935483870967744, 'fraction_numerical': 0.008870967741935484, 'mean_word_length': 4.615384615384615, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
RED RIVER ACTIVE FAULT ZONE IN NORTHWESTERN SOUTH CHINA SEA

The Red River Fault Zone is a large slide and active fault zone, which controls the tectonic activities of the northwestern South China Sea as well as the formation and evolution of the Yinggehai Basin. Explanation has been made based on the seismic profiles through the Yinggehai Basin and history data. The result indicates that there exist three evolutional stages for the Yinggehai Basin: at the beginning of 50Ma B.P., the rudiment of the Yinggehai basin formed under the stress action of the sinistral rotation slide along the Red River Fault Zone and the clockwise rotation of Indochina massif; since 24Ma B.P., the reverse structure formed in the northwestern basin under the action of the stress field of the sinistral rotation and compressive shearing; and since 5Ma B.P., the huge-thick sediment layer formed due to dextral rotation slip and quick subsiding of the basin. Based on the distance between the oldest and youngest depocenters in the basin, it is deduced that the sinistral rotation slip is about 200km along the Red River Fault Zone. In the modern times, the activity of the fault zone becomes weak and there has happened earthquakes of M s 5 for 10 times.