南海北部中新世碳酸盐台地的水道类型  

Channel Types of Miocene Carbonate Platform in the Northern South China Sea

作　　者：万鑫 徐兴科 于英顺 贾霆 宫诲婕 兰志超 WAN Xin;XU Xingke;YU Yingshun;JIA Ting;GONG Huijie;LAN Zhichao(PEGETE Group Inc,Beijing,100083)

机构地区：[1]北京地大博创科技有限公司,北京100083

出　　处：《海洋石油》2024年第4期19-24,共6页Offshore Oil

摘　　要：碳酸盐台地作为地质学研究的热点之一,其含油气性和对环境变化的敏感性备受广大学者关注。然而,对于碳酸盐台地内部水道体系的研究尚显不足。该文基于澳大利亚大堡礁和墨西哥湾大巴哈马滩等地的调研,运用高精度多波束数据,对南海北部中新世碳酸盐台地的水道进行了系统研究。根据水道的发育位置、形态及功能,将其划分为礁缘水道、台缘斜坡水道、台前陡坡峡谷和深水水道四种类型。利用高分辨率地震资料详细分析了各类水道的地震反射特征。在成因方面,古地貌、碳酸盐岩碎屑供应和相对海平面变化是影响这四类水道形成的关键因素。古地貌决定了水道的位置和地质形态,碳酸盐岩碎屑的供应速率则对水道的侵蚀和沉积过程产生重要影响。此外,相对海平面的变化影响碳酸盐台地的发育并控制各类水道的形成。As one of the hotspots in geological research,carbonate platforms have attracted the attention of many scholars for their oil and gas properties and sensitivity to environmental changes.However,the research on the internal water channel system of carbonate platforms is still insufficient.This article is based on the research in areas such as Great Barrier Reef in Australia and Grand Bahama Beach in Gulf of Mexico.Using high-precision multibeam data,a systematic study was conducted on the channels of the Miocene carbonate plateau in the northern South China Sea.According to the development location,morphology,and function of channel,they are divided into four types:reef edge channel,platform edge slope channel,platform slope canyons,and deep-water channel.Detailed analysis of seismic reflection characteristics of various waterways was conducted using high-resolution seismic data.In terms of genesis,ancient landforms,supply of carbonate rock debris,and relative sea level changes are the key factors affecting the formation of these four types of channels.The ancient landforms determine the location and geological morphology of channel,while the supply rate of carbonate rock debris has a significant impact on the erosion and sedimentation processes of channel.In addition,changes in relative sea level affect the development of carbonate platforms and control the formation of various channels.

关 键 词：碳酸盐台地 礁缘水道 台缘斜坡水道 台前陡坡峡谷 深水水道 

分 类 号：P618.13[天文地球—矿床学]