| 江苏省里下河(兴化-泰州)地区浅表沉积物特征及古地理环境演变 |
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| 引用本文： | 冯金顺,孙磊,葛云,徐广志,邵家骥.江苏省里下河(兴化-泰州)地区浅表沉积物特征及古地理环境演变[J].地质学刊,2007,31(2):101-107. |
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| 作者姓名： | 冯金顺 孙磊 葛云 徐广志 邵家骥 |
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| 作者单位： | 江苏省地质调查研究院 江苏南京210018(冯金顺，孙磊，葛云，邵家骥)，江苏省赣榆县地震局 江苏赣榆222100(徐广志) |
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| 基金项目： | 本文系区调集体成果,张登明、徐雪球等参与了部分工作并审阅了全文,在此仅表谢意,文中若有错误之处望批评指出. |
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| 摘 要： | 里下河地区浅部沉积物多为全新世中、晚期堆积,多数地区缺失全新世早期沉积。沉积物以淤泥质亚粘土、亚粘土、亚砂土,粉砂质淤泥、淤泥质粉砂、淤泥及泥炭为特征。沉积前的古地貌为四周高、中间低的碟形盆地。古气候经历了温湿—暖湿—温湿—温干的变化过程。区内曾有两次海侵,第一次海侵发生在全新世早中期,范围几乎遍及全区;第二次海侵发生在全新世晚期,规模小、范围窄、时间短,为海水沿江河倒灌、回溯形起。该区古环境自全新世以来经历了浅水海湾—古泻湖—湖沼地及平原的演变过程,最终形成现今河湖稠密的低凹平原。
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| 关 键 词： | 浅部 沉积特征 古气候 环境演变 江苏 |
| 文章编号： | 1003-6474（2007）02-0101-07 |
| 收稿时间： | 2006-06-20 |
| 修稿时间： | 2006-06-202006-06-29 |
On shallow sediment properties and paleogeographic evolvement in Xinghua-Taizhou, Jiangsu |
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| FENG Jin-shun,SUN Lei,GE Yun,XU Guang-zhi,SHAO Jia-ji.On shallow sediment properties and paleogeographic evolvement in Xinghua-Taizhou, Jiangsu[J].Jiangsu Geology,2007,31(2):101-107. |
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| Authors: | FENG Jin-shun SUN Lei GE Yun XU Guang-zhi SHAO Jia-ji |
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| Institution: | 1. Geological Survey of Jiangsu Province, Nanjing 210018, China; 2. Ganyu Seismic Bureau of Jiangsu Province, Ganyu 221000, Jiangsu |
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| Abstract: | The shallow sediments in Lixiahe region (Xinghua-Taizhou) are the accumulation of middle and late Holocene Epoch, the early sedimentation was absent in most of the areas. The sediments are mostly muddy silty clay, silty clay, sandy sludge, muddy sandstone, sludge and peat. Before sedimentation, the old landform was dishing basin with high in the milieu and low in the center. The paleoclimate underwent a process of humid warm to warm humid and humid warm to dry warm. Twice marine transgressions occurred in the study area, the first marine transgression occurred in the early and middle periods of Holocene Epoch, with a range of almost the whole region; the second marine transgression occurred late period of Holocene Epoch, with a small scale, narrow range and short time period, and brought about by river reverse flow and retrospect. The old environment underwent an evolvement of shallow sea gulf, paleolagoon, limnetic land and plain, and eventually formed the present low-lying plain with dense rivers and lakes. |
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| Keywords: | Shallow lands Sedimentation properties Paleoclimate Environmental evolution Jiangsu |
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