Spatial and temporal temperature trends on the Yunnan Plateau (Southwest China) during 1961-2004

2010 ◽  
Vol 31 (14) ◽  
pp. 2078-2090 ◽  
Author(s):  
Ze-Xin Fan ◽  
Achim Bräuning ◽  
Axel Thomas ◽  
Jin-Bao Li ◽  
Kun-Fang Cao
Keyword(s):  
Southwest China ◽  
Temperature Trends ◽  
Yunnan Plateau

scholarly journals Weathering of Ophiolite Remnant and Formation of Ni Laterite in a Strong Uplifted Tectonic Region (Yuanjiang, Southwest China)

Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 51 ◽  
Author(s):  
Wei Fu ◽  
Yangyang Feng ◽  
Peng Luo ◽  
Yinmeng Zhang ◽  
Xiaorong Huang ◽  
...  
Keyword(s):  
Southwest China ◽  
Tectonic Setting ◽  
Continuous Operation ◽  
Tectonic Uplift ◽  
Yunnan Plateau ◽  
Active Tectonic ◽  
History Of ◽  
Southwestern Margin ◽  
Planation Surfaces ◽  
Weathering Process

The Yuanjiang Ni deposit in southwestern margin of the Yunnan Plateau is the only economically important lateritic Ni deposit in China. It contains 21.2 Mt ore with an average grade of 1.05 wt % Ni and has been recognized as the second largest Ni producer in China following the Jinchuan super-large magmatic Ni–Cu deposit. This Ni deposit is hosted within the lateritic regolith derived from serpentinite within the regional Paleo-Tethyan Ophiolite remnants. Local landscape controls the distribution of the Ni mineralized regolith, and spatially it is characterized by developing on several stepped planation surfaces. Three types of lateritic Ni ores are identified based on Ni-hosting minerals, namely oxide ore, oxide-silicate mixed ore and silicate ore. In the dominant silicate ore, two phyllosilicate minerals (serpentine and talc) are the Ni-host minerals. Their Ni compositions, however, are remarkably different. Serpentine (0.34–1.2 wt % Ni) has a higher Ni concentration than talc (0.18–0.26 wt % Ni), indicating that the serpentine is more significantly enriched in Ni during weathering process compared to talc. This explains why talc veining reduces Ni grade. The geochemical index (S/SAF value = 0.33–0.81, UMIA values = 17–60) indicates that the serpentinite-derived regolith has experienced, at least, weak to moderate lateritization. Based on several lines of paleoclimate evidence, the history of lateritization at Yuanjiang area probably dates to the Oligocene-Miocene boundary and has extended to the present. With a hydrology-controlled lateritization process ongoing, continuous operation of Ni migration from the serpentinite-forming minerals to weathered minerals (goethite and serpentine) gave rise to the development of three types of Ni ore in the regolith. Notably, the formation and preservation of the Yuanjiang lateritic Ni deposit has been strongly impacted by regional multi-staged tectonic uplift during the development of Yunnan Plateau. This active tectonic setting has promoted weathering of serpentinite and supergene Ni enrichment, but is also responsible for its partial erosion.

scholarly journals Association of the Pro12Ala, C161-T polymorphisms in the PPARγ2 gene with obesity in Han nationality of Yunnan Plateau in Southwest China

2021 ◽  
Author(s):  
Teng Zhang ◽  
Nichang Zhang ◽  
Yandong Guo ◽  
Fei Mi ◽  
Qiong Meng ◽  
...  
Keyword(s):  
Yunnan Province ◽  
Southwest China ◽  
Conditional Logistic Regression ◽  
Public Health Problem ◽  
Sample Population ◽  
Major Public Health Problem ◽  
Han Nationality ◽  
Yunnan Plateau ◽  
Increased Risk ◽  
Combined Genotypes

Abstract Background Obesity is considered a major public health problem in the world. At present, the association of single nucleotide polymorphisms (SNPS) Pro12Ala and C161-T in peroxisome proliferator-activated receptor gamma 2 (PPARγ2) gene with obesity is still controversial. The aim of this study is to evaluate the relationship between the Pro12Ala and C161-T polymorphisms of PPARγ2 gene and obesity among Han nationality of Yunnan Plateau in Southwest China. Methods The genotypes of 284 extremely overweight patients, 475 obese patients and 759 normal controls from Yongsheng County of Yunnan Province (China) were analyzed. The Pro12Ala and C161-T genotypes of PPARγ2 were detected by SNaPshot genotyping assay. The data were analyzed statistically. Results The overall prevalence of obesity was 4.99% and the overweight rate was 23.93% among Han nationality in Yongsheng, Yunnan Province. Statistical analysis showed that there were no significant differences in the Pro12Ala genotype, C161-T genotype and the two combined genotypes between the extremely overweight and the control 1, either between the obesity and the control 2 (P > 0.05). Further, the alleles of Pro12Ala and C161-T did not exhibit any signifificant association with extreme overweight or obesity among the complete sample population (P > 0.05). However, conditional logistic regression analysis showed that there was a statistically significant association between the two combined genotype of “CC + TT” and the extreme overweight after adjusting for covariates (Calculated with the combined genotype of “CC + CC ” as the reference category; P = 0.014; OR = 4.04; 95%CI = 1.33–12.33). Conclusions Our study indicates that the combined genotypes "CC + TT" of PPARγ2 Pro12Ala and C161-T were associated with an increased risk of extreme overweight, however, Pro12Ala and C161-T polymorphisms may not be the main cause of obesity in Han nationality of the Yunnan Plateau in Southwest China.

The spatial distribution and temporal variation of rainfall erosivity in the Yunnan Plateau, Southwest China: 1960–2012

CATENA ◽  
2016 ◽  
Vol 145 ◽  
pp. 291-300 ◽  
Author(s):  
Gu Zhijia ◽  
Duan Xingwu ◽  
Liu Bing ◽  
Hu Jinming ◽  
He Jiaonan
Keyword(s):  
Spatial Distribution ◽  
Temporal Variation ◽  
Southwest China ◽  
Rainfall Erosivity ◽  
Yunnan Plateau

Precipitation and temperature trends for the Southwest China: 1960-2007

2010 ◽  
Vol 24 (25) ◽  
pp. 3733-3744 ◽  
Author(s):  
Nianxiu Qin ◽  
Xi Chen ◽  
Guobin Fu ◽  
Jianqing Zhai ◽  
Xianwu Xue
Keyword(s):  
Southwest China ◽  
Temperature Trends ◽  
Precipitation And Temperature

Using species distribution modeling to improve conservation of medicinal plants in Southwest China

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
B Liu ◽  
F Li ◽  
Z Guo ◽  
L Hong ◽  
W Huang ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Species Distribution ◽  
Southwest China ◽  
Species Distribution Modeling ◽  
Distribution Modeling
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