scholarly journals An aquifer is the control of magma eruption

Author(s):  
Yi Ding ◽  
Yunxia Wu ◽  
Zheng Hou ◽  
Wensheng Wu ◽  
Zongyuan Tang

Abstract The location of a large group of maars in a basin of 200 km2 in Huitengxile, Inner Mongolia Autonomous Region of China, was probably the center of a magmatic plume in the past. The cross section of maars looks like saucers, with diameters ranging from the largest 900 to the smallest 10 m. Crashed rocks in strata exposed by the drill core and magnetic survey indicate explosions underground by insupportableness of steam accumulation from interaction of magma and water. In Huitengxile and other parts of Inner Mongolia, maars with the same shape and caprock age characteristics exist in an area of 30,000 km2, which indicates that they formed by substantial magmatic activity at the same time and in the same phreatic style. The aquifer layer in the crust constrained the eruption of the magma to overbear via phreatic shooting and releasing its energy. What has been happening at Yellowstone has similar phenomena to what had in Huitengxile and surroundings. The magmatic activities under Yellowstone may have been reined by an aquifer so that magma could not threaten the world.

Author(s):  
Qiong Xue ◽  
Zhenqiang Zuo ◽  
Heng Zhou ◽  
Jian Zhou ◽  
Shengjie Zhang ◽  
...  

A haloalkaliphilic strain XQ-INN 246T was isolated from the sediment of a salt pond in Inner Mongolia Autonomous Region, China. Cells of the strain were rods, motile and strictly aerobic. The strain was able to grow in the presence of 2.6–5.3 M NaCl (optimum concentration is 4.4 M) at 30–50 °C (optimum temperature is 42 °C) and pH 7.0–10.0 (optimum pH is 8.0–8.5). The whole genome sequencing of strain XQ-INN 246T revealed a genome size of 4.52 Mbp and a DNA G+C content of 62.06 mol%. Phylogenetic tree based on 16S rRNA gene sequences and concatenated amino acid sequences of 122 single-copy conserved proteins revealed a robust lineage of the strain XQ-INN 246T with members of related genera of the family Natrialbaceae . The strain possessed the polar lipids of phosphatidylglycerol and phosphatidylglycerol phosphate methyl ester. No glycolipids were detected. Based on phylogenetic analysis, phenotypic characteristics, chemotaxonomic properties and genome relatedness, the isolate was proposed as the type strain of a novel species of a new genus within the family Natrialbaceae, for which the name Salinadaptatus halalkaliphilus gen. nov., sp. nov. is proposed. The type strain is XQ-INN 246T (=CGMCC 1.16692T=JCM 33751T).


Zootaxa ◽  
2020 ◽  
Vol 4808 (3) ◽  
pp. 455-474
Author(s):  
QING-BO HUO ◽  
ZHEN-NING CHEN ◽  
XIANG-BO KONG ◽  
YU-ZHOU DU

Three species of the family Perlodidae are newly reported or confirmed for China, Isoperla asiatica Raušer from Arxan, Inner Mongolia Autonomous Region, Isoperla eximia Zapekina-Dulkeit from Changbai Mountain, Jilin Province, and Mesoperlina capnoptera (McLachlan, 1886) from Xinjiang Uygur Autonomous Region. Based on new material, additional taxonomic notes and images of another perlodid stonefly, Rauserodes epiproctalis (Zwick, 1997) is provided. 


Sign in / Sign up

Export Citation Format

Share Document