Isotopic characteristics and source analysis of atmospheric ammonia during agricultural periods in the Xichuan area of the Danjiangkou Reservoir

Chen, Xiaoshu; Zhao, Ting; Xiao, Chunyan; Gao, Xiaoming; Chen, Feihong

doi:10.1016/j.jes.2022.10.041

Cited by 8 publications

(1 citation statement)

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“…Before the reservoir was filled, this area belonged to Guozhuang Village, hence the name Guozhuang Cemetery. The site was submerged on the eastern bank of the Danjiangkou Reservoir after it was dammed [2,3]. In 1977, the archaeological team of the Henan Provincial Cultural Relics Work Team at the Danjiangkou Reservoir excavated the cemetery, but due to the rising water level, the excavation was not completed.…”

Section: Introductionmentioning

confidence: 99%

Study on the Bronze Weapons Excavated from Xichuan, China

Zhao,

Liu,

Chen

et al. 2024

Metals

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The collection of twelve bronze artifacts discovered in Xichuan provides invaluable historical insights into the Warring States period (476 BC to 221 BC) of ancient China. To investigate their fabrication techniques and current state of preservation, a comprehensive analysis was conducted using a metallographic microscope, a scanning electron microscope, and an electron spectrometer to examine the microstructure and elemental composition of the artifacts. The findings revealed that the copper content in these bronze artifacts varied between 41.82% and 87.95%, the tin content ranged from 6.79% to 46.88%, and the lead content was less than 28.96%. The microstructure exhibited an α-solid-solution dendritic-crystal-segregation structure, with a substantial amount of (α + δ) eutectic distributed in an island-like pattern. Lead was dispersed unevenly, appearing as small granules and large ellipsoids. The composition of these weapons aligned with their intended use, adhering to the manufacturing standards of traditional Chinese bronzes. However, their state of preservation was suboptimal, necessitating immediate protective measures. This study contributes physical evidence to the research on early Chinese bronze production and offers scientific guidance for the conservation and restoration of these bronze artifacts.

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Section: Introductionmentioning

confidence: 99%