Results 51 to 60 of about 1,235 (243)

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

Method for parameter extraction of geometric features of gravel materials based on artificial intelligence analysis of CT images

Yantu gongcheng xuebao
Sand and gravel mixture are widely used fill material for earth and rock dams, with its mechanical properties significantly influenced by particle geometric characteristics such as gradation, shape, and spatial arrangement.
PENG Jiayi1, 2 , FU Zhongzhi1, 2, SHEN Zhenzhong3, XU Siyuan1, 2
doaj   +1 more source

Geochemical and Geological Investigation of Skarn‐Type Pb–Zn Mineralization in Hastanetepe (Balya‐Balıkesir, Türkiye): An Approach Based on Fluid Inclusions, Sulphur Isotopes and Geochemical Data

Geological Journal, EarlyView.
Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley   +1 more source

Reasonable connection type for cutoff wall and core wall of earth-rock dams on deep overburden layers

Yantu gongcheng xuebao, 2017
The earth-rock dams built on deep overburden layers often use a closed seepage control system which is composed of core wall of dam body and impervious wall of dam foundation.
SHEN Zhen-zhong , TIAN Zhen-yu , XU Li-qun , GAN Lei
doaj   +1 more source

Creep behavior of rockfill with soft rock under different relative densities

Yantu gongcheng xuebao, 2020
When soft rock is used as the dam embankment materials for high earth-rock dams, large creep deformation may occur, which is very unfavorable to the long-term stability of high earth-rock dams.
CHEN Xiu-ji 1, CHEN Qun 1, ZHOU Cheng-jing 2, LI Jian-guo 3
doaj   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

More unpredictable river floods at the most glacierized Third Pole basin

Communications Earth & Environment
Extreme flooding poses threats to earth-and-rock dams and downstream communities, especially in glacierized basins with unclear flood predictability.
Hu Liu, Lei Wang, Deliang Chen, Tandong Yao, Ahmad Bashir   +4 more
doaj   +1 more source

Discriminant analysis for earth-rock dams' stability under the condition of exceeding standard flood

Shui kexue jinzhan, 2012
Climate extremes occur frequently and dam breach occasionally happens at present.It's very significant to present a fast and efficient discriminant method for earth-rock dam's stability under conditions of exceeding standard flood.However,this task is ...
LI Yun, WANG Xiao-gang, ZHU Long, XUAN Guo-xiang, LIU Huo-jian   +4 more
doaj   +1 more source

Calculation and Analysis of Earth-rock Dam Seepage Flow Based on FEM

IOP Conference Series: Materials Science and Engineering, 2020
Abstract Earth-rock dam is the oldest dam type and is the most widely used type of dam in the world. Because earth-rock dams have the superiority that other dam types do not have, earth-rock dams have a large proportion in China. After the earth-rock dam is built to retain water, it sees a seepage in the dam body.
Liuchuang Wei, Ping Wei
openaire   +1 more source

Seepage Monitoring Models Study of Earth-Rock Dams Influenced by Rainstorms [PDF]

Mathematical Problems in Engineering, 2016
For earth-rock dams influenced by rainstorms, seepage status monitoring is very important and provides the basis for the safe and effective operation of earth-rock dams. The most influential factors concerning the seepage of earth-rock dams are the reservoir water level, precipitation, temperature, and timeliness, and the influence of the reservoir ...
Jianchun Qiu, Dongjian Zheng, Kai Zhu
openaire   +1 more source