Soil samples of current paddy soils,ancient paddy soil/ancient dry land soil,and bottom soils were collected from two sites in Chuodunshan Site of Majiabang Culture(about 6 000a).
kg-1,主要来源于大气沉降;古水稻土中PAHs含量明显降低,仅为56。
Previous studies suggested that two layers of ancient paddy soils existed in Holocene strata at the lower Changjiang River delta region in China,but little evidence of soil chemical and physical data has been offered up to now.
前人研究认为,在长江下游地区绰墩农业遗址的全新世地层中存在2个古水稻土层,但到目前为止尚缺乏土壤化学和物理学方面的证据。
The principle and application of magnetic fabric to paleocurrent estimation of drilling cores;
岩心磁组构分析古水流方向的原理与应用
A geometrical method of calculating paleocurrent direction using seismic progradation reflection characteristics;
利用地震前积反射特征确定古水流方向的沉积几何方法
In order to confirm the sedimentary source direction of Yanchang Formation in Yichuan area of Ordos Basin,according as abundant analysis and test data,using characteristic of the sandstone lithology,the features of light and heavy mineral group,paleocurrent direction,and rare earth element distributing pattern,anal.
依据大量分析化验数据,根据砂岩岩石学特征、轻重矿物组合特征、古水流方向、碎屑粒度变化及稀土元素分配模式等,对研究区延长组物源进行综合研究。
Before the characteristics of fluid migration and accumulation being studied, evolution history of paleo-hydrodynamics must be restored first of all, because of being as specific history events set in geologically history periods.
由于油气的运聚与成藏作用都是发生于地质历史时期的特定历史事件 ,要准确分析流体运移特征 ,就必须首先了解古水动力的演化历史。
This paper researches the vicissitude and space distribution law of the ancient hydrological network in Sanjiang Plain in the main geology history section.
研究了三江平原各个主要地史时期古水文网的变迁和空间分布规律。
PCR-DGGE analyses of bacterial and archaeal community diversities in ancient paddy soils discovered in Chuodunshan Site, Suzhou, China;
绰墩山遗址古水稻土细菌与古菌群落的PCR-DGGE分析
Analysis on sedimentary provenance and palaeocurrent in Yao I Member in northern Gulong area;
古龙北地区姚一段地层沉积物源及古水流分析
This paper aims to analyze the stratigraphic and petrological characteristics, the palaeocurrent, and the clastic compositions of Xueshan Formation.
本文重点研究了雪山组的地层特征、古水流特征以及砂岩碎屑组分特征,在此基础上简单分析了其沉积相特征。
Based on the direction of palaeocurrent revealed by the oblique beddings in the sand.
本文根据山西组主要砂岩体中斜层理反映的古水流流向、砂岩体成因及厚度特征和沉积相分布资料，论证了登封煤田在早二叠世早期的海岸线形态是在总体ＮＥ－ＳＷ走向的背景上有一个向ＮＷ方向凹进的海湾。
Widely distributed calcite and aragonite crystal in the cave passage are originated from ancient pool deposits.
洞内大片分布的石花起源于四大古水池沉积物的存在。