CAJ | 학술논문

通过分析北部湾广西沿岸3个地质钻孔的岩性、地球化学和有孔虫含量特征，确定了其沉积相序，在统一的高程坐标内，对各钻地层中沉积相的高程和年代进行了对比，分析了该区全新世以来海侵过程的区域差异；并以东亚全新世海平面波动曲线作为参照，估算了广西沿岸各主要海湾的构造沉降速度。研究表明：全新世以来，广西沿岸的海侵开始时间并不一致，这是由于各海湾构造沉降运动的区域差异造成的，东部的廉州湾构造基本稳定，而廉州湾以西则经历了较大幅度的构造沉降。构造沉降又导致了海平面波动过程的区域差异，进而影响到了地层形成，如海陆过度相沉积只发育于廉州湾以西遭受海侵时间较晚、相对海平面上升速度较低的区域。
통과분석북부만엄서연안3개지질찬공적암성、지구화학화유공충함량특정，학정료기침적상서，재통일적고정좌표내，대각찬지층중침적상적고정화년대진행료대비，분석료해구전신세이래해침과정적구역차이；병이동아전신세해평면파동곡선작위삼조，고산료엄서연안각주요해만적구조침강속도。연구표명：전신세이래，엄서연안적해침개시시간병불일치，저시유우각해만구조침강운동적구역차이조성적，동부적렴주만구조기본은정，이렴주만이서칙경력료교대폭도적구조침강。구조침강우도치료해평면파동과정적구역차이，진이영향도료지층형성，여해륙과도상침적지발육우렴주만이서조수해침시간교만、상대해평면상승속도교저적구역。
This study analyzed the stratigraphic correlation among several cores collected from the Guangxi coast‐line ,and discussed the spatial discrepancy of transgression since Holocene .And ,using the East Asia seal level fluc‐tuation curve as a reference ,this study also estimated the rate of vertical tectonic movement in main bays offshore Guangxi Province .The results show that since Holocene the initiation time for transgression in different local re‐gions along Guangxi coastline are different ,w hich is due to regional differences in tectonic sinking movement among these main bays .The tectonics in the eastern part of the Lianzhou Bay is stable ,and that in the western part of the bay is unstable with a sinking speed of 1 to 3 mm/a .The tectonic sinking process resulted in regional differences in the sea level fluctuation curves ,and thereby influenced the development of stratigraphy .For example ,the salt mash face can only be found in the area west to Lianzhou Bay ,where experienced a relative slow local sea level rising speed .