Starch grain analysis of two different types of grinding stones from the Neolithic Shuangdun site (ca. 7.3‐6.8ka BP) in Eastern China

Archaeometry ◽  
2021 ◽  
Author(s):  
Yuzhang Yang ◽  
Ling Yao ◽  
Dong Zhang ◽  
Jingwen Liao ◽  
Xuhang Kan ◽  
...  
Keyword(s):  
Eastern China ◽  
Starch Grain Analysis ◽  
Starch Grain ◽  
Different Types ◽  
Grinding Stones

Water–Rock Interactions and Origin of Formation Water in a Continental Rift Lacustrine Basin: A Case Study of the Cenozoic Formation in Bonan Sag, Bohai Bay Basin

2021 ◽  
pp. 1-65
Author(s):  
Tianxia An ◽  
Bingsong Yu ◽  
Yongshi Wang ◽  
Zhuang Ruan ◽  
Wei Meng ◽  
...  
Keyword(s):  
Lake Water ◽  
Eastern China ◽  
Atmospheric Precipitation ◽  
Bohai Bay ◽  
Type I ◽  
Formation Water ◽  
Bohai Bay Basin ◽  
Type Iii ◽  
Different Types ◽  
Bonan Sag

The faulted lacustrine Bohai Basin in eastern China contains abundant hydrocarbon resources. In these reservoirs, understanding the sandstone diagenesis and the resulting formation water provides a means to unravel the evolution processes in the basin. In most cases, the lack of isotopic and trace element analysis tests in this type of basin limits the research on the origin and evolution of formation water in this area. We have used multivariate statistical methods to classify the geochemical characteristics of the formation water for the Cenozoic Formation of Bonan Sag in the Bohai Bay Basin. Analysis of correlations among the evolution processes of different ions in different types of formation water provides an understanding of the primary factors influencing the ion content. We also evaluate the water-rock interactions of different types of formation water to evaluate their geologic significance, and we find three types. Type I formation water includes a mixture of river water, lake water, and atmospheric precipitation and exhibits weak water-rock interactions. Type II formation water contains primitive freshwater and brackish lake water that has undergone an evolution process similar to that of type I formation water, but that was followed by evaporation and concentration, the dissolution and precipitation of calcite and iron calcite, and feldspar dissolution. Type III formation water, which is a product of rock reconstruction, originates from saline lake sediment water. After undergoing evolution processes similar to those of types I and II, type III formation water is also affected by dissolution of evaporite, albite, dolomite, and iron dolomite. Thus, type III formation water is the product of water-rock interactions such as precipitation, SO42− reduction, and pyrite precipitation in which the water-rock reaction controls the development mechanism and characteristics of the reservoir space.

Starch grain analysis reveals function of grinding stone tools at Shangzhai site, Beijing

2009 ◽  
Vol 52 (8) ◽  
pp. 1164-1171 ◽  
Author(s):  
XiaoYan Yang ◽  
JinCheng Yu ◽  
HouYuan Lü ◽  
TianXing Cui ◽  
JingNing Guo ◽  
...  
Keyword(s):  
Stone Tools ◽  
Starch Grain Analysis ◽  
Starch Grain ◽  
Grinding Stone

Starch grain analysis for groundstone tools from Neolithic Baiyinchanghan site: implications for their function in Northeast China

2011 ◽  
Vol 38 (12) ◽  
pp. 3577-3583 ◽  
Author(s):  
Dawei Tao ◽  
Yan Wu ◽  
Zhizhong Guo ◽  
David V. Hill ◽  
Changsui Wang
Keyword(s):  
Northeast China ◽  
Starch Grain Analysis ◽  
Starch Grain

scholarly journals The Relationship between Soil Moisture and LAI in Different Types of Soil in Central Eastern China

2016 ◽  
Vol 17 (11) ◽  
pp. 2733-2742 ◽  
Author(s):  
Li Liu ◽  
Renhe Zhang ◽  
Zhiyan Zuo
Keyword(s):  
Particle Size ◽  
Soil Moisture ◽  
Soil Water ◽  
Water Retention ◽  
Eastern China ◽  
Soil Water Retention ◽  
Different Types ◽  
Central Eastern ◽  
The Impact ◽  
The Relationship

Abstract As important parameters in the land–atmosphere system, both soil moisture (SM) and vegetation play a significant role in land–atmosphere interactions. Using observational data from clay and sand stations over central eastern China, the relationship between leaf area index (LAI) and SM (LAI–SM) in different types of soil was investigated. The results show that the LAI–SM correlation is significantly positive in clay but not significant in sand. The physical causes for the discrepant LAI–SM correlations in different types of soil were explored from the perspectives of evapotranspiration (ET) and soil water retention. In clay stations, increasing LAI is associated with greater soil-water-retention capacity. Although the increasing LAI corresponds to increasing ET, the impact of ET on SM is weak because of the small particle size of soil. Consequently, the LAI–SM relationship in clay is significantly positive. In sand stations, ET is negatively correlated with SM owing to the large soil particle size, resulting in a negative LAI–SM correlation in sand. However, soil water retention is weakened by the increased LAI, which may be an important factor causing the insignificant LAI–SM correlation in sand.

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