| 南黄海西部浅部地层地震层序及其沉积特征 |
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| 引用本文： | 顾兆峰,张志珣.南黄海西部浅部地层地震层序及其沉积特征[J].海洋地质与第四纪地质,2009(4). |
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| 作者姓名： | 顾兆峰 张志珣 |
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| 作者单位： | 国土资源部海洋油气与环境地质重点实验室;青岛海洋地质研究所; |
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| 基金项目： | 地质大调查项目“1∶100万南通幅海洋区域地质调查”(200211000001) |
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| 摘 要： | 南黄海陆架在第四纪具有海侵—海退交替发生、海陆相地层交互沉积的特点,沉积相及其分布主要受海平面变化与古河流及其三角洲的控制。对南黄海西部地区采集的5600km浅层地震剖面进行了层序划分与解释,得到以下认识:(1)早更新世晚期以来的南黄海地层可分为U1—U14共14个地震地层单元,组成6个地震层序,代表了6次大规模海侵-海退过程,其中氧同位素5期海相地层在该地区最发育;(2)根据全新世地层厚度变化,将该区分为6个沉积区:东部弱沉积区、中北部沉积发育区、海州湾外侵蚀区、废黄河口沉积区、射阳河口岸外侵蚀区和苏北浅滩沉积区;(3)氧同位素6期至2期,南黄海西部陆相层内发育了3期埋藏古河道:上层古河道发育于氧同位素2期,古长江水系、古黄河水系分别自南黄海南部、北部流入古黄海;中层古河道发育于氧同位素4期,仅分布于近岸地区;下层古河道发育于氧同位素6期,分布于123°E以西地区,其南部古河道应为古长江水系,规模较大,其北部古河道规模较小,分布范围有限;(4)古长江第四纪早期在古黄海入海,古黄河在氧同位素5期中后期也开始自古黄海入海,其古河道发育具有一定继承性,后期发育规模逐渐增大;(5)气候温暖的高海面时期发育于构造沉降...
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| 关 键 词： | 地层层序 沉积特征 浅层地震 南黄海西部 |
SHALLOW SEISMIC STRATIGRAPHY AND SEDIMENTARY CHARACTER IN THE WESTERN SOUTH YELLOW SEA |
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| GU Zhaofeng,ZHANG Zhixun.SHALLOW SEISMIC STRATIGRAPHY AND SEDIMENTARY CHARACTER IN THE WESTERN SOUTH YELLOW SEA[J].Marine Geology & Quaternary Geology,2009(4). |
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| Authors: | GU Zhaofeng ZHANG Zhixun |
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| Institution: | 1 Key Laboratory of Hydrocarbon Resource and Environmental Geology;Qingdao 266071;China;2 Qingdao Institute of Marine Geology;China |
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| Abstract: | The character of Quaternary continental shelf in the South Yellow Sea is transgressive-regressive cycles and alternating continental-marine strata,the sediment facies and distribution are controlled mainly by sea-level changes,paleo-channel and its delta.Based on the 5 600 km shallow seismic profile acquired in western South Yellow Sea recently,we distinguished and interpreted the stratigraphic sequences,and following conclusions are made:(1)The strata of South Yellow Sea since early Pleistocene are divided... |
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| Keywords: | seismic stratigraphy sedimentary character shallow seismic western South Yellow Sea |
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