Entity

Time filter

Source Type


Zhao W.,Nanjing University | Zhao W.,Ningxia Geophysical and Geochemical Exploration Institute | Sun Y.,CAS Institute of Earth Environment | Balsam W.,Dartmouth College | And 4 more authors.
Geophysical Research Letters | Year: 2015

Hf-Nd-Sr isotopic fingerprinting has been employed as a powerful method for distinguishing dust sources. However, the Hf and Sr isotopic compositions of dust are highly dependent on particle size to accurately identify dust provenance. Here we compare the Hf-Nd-Sr isotopic compositions of clay-sized fractions from dust sources (the Mongolian Plateau) to sinks (Beijing and Greenland). Our results document that clay-sized Hf-Nd-Sr isotopic compositions of Mongolian dust are controlled by two isotopic/geochemical provinces: Southern Mongolian Gobi (SMG) and Northern Mongolian Plateau (NMP). Our data indicate that the SMG is potentially an important dust source to the loess in Beijing and Hulun Buir and could be a contributing source of dust to Greenland, whereas the NMP contributes little dust to the Chinese loess and the Greenland. Furthermore, we demonstrate that the deserts of northwest China are one of the main dust contributors to Beijing and Greenland, but not to Hulun Buir. Key Points The clay-sized radiogenic isotopic compositions link to the geological setting The Southern Mongolia Gobi could be a contributing source to Greenland The Hf-Nd-Sr isotope constrains on provenances and pathway of mineral dust. © 2015. American Geophysical Union. All Rights Reserved.


An B.-Z.,University of Science and Technology of China | An B.-Z.,Ningxia Geophysical and Geochemical Exploration Institute | Feng Z.-M.,Ningxia Geophysical and Geochemical Exploration Institute | Li N.-S.,Ningxia Geophysical and Geochemical Exploration Institute | And 3 more authors.
Wutan Huatan Jisuan Jishu | Year: 2015

To recognize the location of geology body and faults in someplace in Inner Mongolia, we adopted analytical single amplitude and tilt derivative method to process high resolution magnetic data, and the data have been reduced to pole. Then we adopted vertical derivative and total horizontal gradient method to process the same data. The result shows that by analytical single amplitude and tilt derivative method, 7 faults and 2 boundaries of rock mass can be found, and for derivative and total horizontal gradient method, only 6 boundaries can be found. The former matches better with geology data. It shows that analytical single amplitude and tilt derivative method have some advantages when it was used to recognize geology bodies and locate the position of faults.


Feng Z.-M.,Ningxia Geophysical and Geochemical Exploration Institute | Li N.-S.,Ningxia Geophysical and Geochemical Exploration Institute | An B.-Z.,Ningxia Geophysical and Geochemical Exploration Institute | An B.-Z.,China University of Geosciences
Wutan Huatan Jisuan Jishu | Year: 2015

Liupan mountain is located at the connecting zone between the southwest edge of Erdos block and north Qilian o-rogenic belt. The place is the intersection of several regional faulting belt. There are lots of arguments about the structural framework. In this paper, we would analysis the distribution of magnetic anomaly based on 1:50 000 high resolution magnetic map, combined with geologic information to derive the cause of magnetic anomaly. Then we would adopt geochemical, electrical and gravity to verify the conclusion we got. Finally, we can get that from west to east, the region can be divided into three structural unit; north Qilian mountains collision orogenic belt, Transitional tectonic belt, Erdos west edge thrust fold belt and the boundary of north Qilian mountains collision orogenic belt. The Erdos west edge thrust fold belt should be west Huashan - six Panshan east fracture zone.

Discover hidden collaborations