2013年9月，第19卷，第3期，520-528页 September 2013,Vol.19,No.3，p.520528
高校地质学报
Geological Journal of China Universities
徐州地区新元古界赵圩组风暴沉积特征分析
陆鹿，李壮福，叶嗣暄，康鹏，张新
中国矿业大学资源与地球科学学院，徐州221116
摘要：徐州地区新元古界赵圩组地层在赵圩村出露良好，整体为一套碳酸盐岩沉积，岩性组合可划分为4段：缅粒灰岩段、风暴事件沉积段、登层右段和白云岩段，其中登层石段又划分为A和B两个单元。副面内部发育大量风暴沉积记录，并与正常沉积在垂向上互层叠置，整体具有向上频率变弱、规模变小的趋势。典型的风暴沉积标志包括丘状交错层理、粒序层理、冲刷-充填构造、冲刷切削构造、砾屑灰岩层、生物礁丘截切现象等。文中划分出4种风暴沉积序列类型，说明每种序列类型指示的古地理和古环境意义，以及在剖面上的分布组合特征。依据剖面岩性与风暴沉积的分布组合规律，认为赵圩组由下至上构成一个总体向上变深，面后又变浅的沉积序列，沉积环境演化依次为浅滩一近岸浅水潮下带一碳酸盐岩开阔台地一碳酸盐岩局限台地一深水斜坡一潮坪、泻湖，气候总体炎热干旱。风暴频发可能与沉积期本区所处的较低的古纬度有关。
关键调：新元古界；赵圩组；风暴沉积；江苏徐州
中图分类号：P512.21
文献标识码：A
文章编号：10067493（2013）03-520-09
CharacterizationofTempestiteSedimentsoftheNeoproterozoic
ZhaoweiFormation inXuzhou Area,JiangsuProvince
LU Lu, LI Zhuangfu, YE Sixuan, KANG Peng, ZHANG Xin School of Resource and Earth Science of CUMT, Xuzhou 221008, China
Abstract: The Neoproterozoic Zhaowei Formation in Xuzhou consists of 4 units, i.e., oolitic unit, tempestite unit, stromatolitid unit and dolornite unit. The stromatolitic unit was subdivided into A and B parts. The tempestites, which abate from early to later stages, alternate with non-tempestites in the vertical section. Some typical sedimentary symbols of tempestite sediments were developed in this zone such as hummocky cross stratification(HCS), flush-filling structure, cut structure, organic reef-cutting structures, calcrudites, graded hed and so on. Four kinds of tempestites sequences were summarized according to the vertical sequence types, structures and sediment characteristics. The distribution of tempestites was also summarized. The discovery of tempestites is helpful to interpret the sedimentary environment. According to the distribution of tempestites and the lithologic characteristics, the authors suggest that the sedimentary environments the Zhaowei Formation were successively shoals landward shallow subtidal zone open carbonate platform restricted carbonate platform tidal flat or lagoon and the climate during the deposition was warm and arid. Frequent storms occurred due to the relatively low palaeolatitude during the deposition.
Key words: Neoproterozoic Era; Zhaowei Formation; tempestites; Jiangsu Province First author: LU La, Master Candidate; E-mail: lulu881208@163.com
20世纪50一60年代，一些学者发现风暴浪对现代陆架沉积物的搬运和再分布起重要作用(Ball et al., 1967; Hayes, 1967; Perkins et al.,
收稿日期：2013-01-14；修回日期：2013-0306
1968）。在随后的70一80年代里，风暴沉积的研究达到高潮，并提出了开阔陆架风暴流沉积的理论。风暴沉积或风暴岩的概念被引人沉积学中进
基金项目：中国矿业大学研究生实践与科研创新项目（GSF121101）资助
作者简介：陆鹿，男，1989年生，在读碳士研究生，矿产普查与勘探专业；E-mail:lulu881208@163.com