Geochemical Characteristics and Migration Pathways of Ordovician Carbonate Oil Reservoirs in the Tuoputai Area, Tarim Basin, Northwestern China

2021 ◽  
Author(s):  
Hua LIU ◽  
Shen WANG ◽  
Bin CHENG ◽  
Zicheng CAO ◽  
Ziyue JIANG
Keyword(s):  
Tarim Basin ◽  
Geochemical Characteristics ◽  
Oil Reservoirs ◽  
Northwestern China ◽  
And Migration ◽  
Migration Pathways

scholarly journals Invasive Plant Species Distribution Is Structured by Soil and Habitat Type in the City Landscape

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 773
Author(s):  
Ilona Szumańska ◽  
Sandra Lubińska-Mielińska ◽  
Dariusz Kamiński ◽  
Lucjan Rutkowski ◽  
Andrzej Nienartowicz ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Species Distribution ◽  
Human Activities ◽  
Invasive Plant ◽  
Habitat Type ◽  
Permanent Plots ◽  
Human Land Use ◽  
And Migration ◽  
Migration Pathways ◽  
The City

Invasive alien species (IAS) is a global problem that largely relates to human activities and human settlements. To prevent the further spread of IAS, we first need to know their pattern of distribution, to determine which constitutes the greatest threat, and understand which habitats and migration pathways they prefer. Our research aimed to identify the main vectors and distribution pattern of IAS of plants in the city environment. We checked the relations between species distribution and such environmental factors as urban soil type and habitat type. We applied data on IAS occurrence (collected in the period 1973–2015) in 515 permanent plots with dimensions of 0.5 × 0.5 km and analyzed by direct ordination methods. In total, we recorded 66 IAS. We found a 27% variance in the IAS distribution pattern, which can be explained by statistically significant soil and habitat types. The most important for species distribution were: river and alluvial soils, forests and related rusty soils, and places of intensive human activities, including areas of urbisols and industriosols. Our results provide details that can inform local efforts for the management and control of invasive species, and they provide evidence of the different associations between natural patterns and human land use.

scholarly journals Ab Initio Investigation of Helium Mobility in La2Zr2O7 Pyrochlore

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 667
Author(s):  
Yanxia Lu ◽  
Qing Peng ◽  
Chenguang Liu
Keyword(s):  
Nuclear Waste ◽  
Density Functional ◽  
Minimum Energy ◽  
Elastic Band ◽  
Waste Forms ◽  
Band Method ◽  
And Migration ◽  
High Level ◽  
Migration Pathways ◽  
Nuclear Waste Forms

The α-decay of incorporated actinides continuously produces helium, resulting in helium accumulation and causing security concerns for nuclear waste forms. The helium mobility is a key issue affecting the accumulation and kinetics of helium. The energy barriers and migration pathways of helium in a potential high-level nuclear waste forms, La2Zr2O7 pyrochlore, have been investigated in this work using the climbing image nudged elastic band method with density functional theory. The minimum energy pathway for helium to migrate in La2Zr2O7 is identified as via La–La interstitial sites with a barrier of 0.46 eV. This work may offer a theoretical foundation for further prospective studies of nuclear waste forms.

Temporal evolution of the Permian large igneous province in Tarim Basin in northwestern China

2011 ◽  
Vol 42 (5) ◽  
pp. 917-927 ◽  
Author(s):  
Zilong Li ◽  
Hanlin Chen ◽  
Biao Song ◽  
Yinqi Li ◽  
Shufeng Yang ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Temporal Evolution ◽  
Northwestern China ◽  
Large Igneous Province ◽  
Igneous Province

The Silurian play in the Tazhong Uplift, Tarim Basin, northwestern China

2007 ◽  
Vol 24 (3) ◽  
pp. 189-198 ◽  
Author(s):  
Xiu Xiang Lu ◽  
Qiuhai Fan ◽  
Fengyun Zhao ◽  
Qinghua Wang ◽  
Qilai Xie ◽  
...  
Keyword(s):  
Tarim Basin ◽  
Northwestern China ◽  
Tazhong Uplift
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