Dong X.,Chinese Academy of Geological Sciences |
Zhang Z.M.,Chinese Academy of Geological Sciences |
Tang W.,Inner Mongolia Mining Exploitation Co.
Acta Petrologica Sinica | Year: 2011
Zircon U-Pb chronology of high-grade metamorphic rooks from the northern margin of the Tarim Craton, was reported in this paper. The metamorphic rocks located on the Tiemenguan of northern Korla, was composed of gneiss, schist, amphibolite and calc-silicate rocks. They have mineral assemblages of plagioclase + K-feldspar + quartz + biotite ± muscovita ± hornblende ± garnet, indicating amphibolite-facies conditions. The zircon U-Pb dating demonstrates that these high-grade metamorphic rocks have been subjected to three-stages of tectono-thermal events, i.e. the Early Paleoproterozoic magmatic event of ∼ 2370Ma, the Late Paleoproterozoic metamorphic event of 1.890 ∼1850Ma and the Early Neoproterozoic metamorphic event of 980 ∼91.0Ma. These results supply significant constrains on Preeambrian tectonic evolution of Tarim Craton. Source
Li H.,China University of Geosciences |
Wang G.,China University of Geosciences |
Yuan G.,China University of Geosciences |
Fang B.,Water Resources University |
And 2 more authors.
Acta Geologica Sinica | Year: 2014
The sedimentary sequences since 33 ka B.P. to 10 ka B.P. have been established in the Re'nacuo-Lake, Gaize area of north Tibet, through a study of a lacustrine section. The climate since 33 ka B.P. to 10 ka B.P. may be divided into two cycle include 5 dry phases and 5 moist phases from reconstructing the paleoclimate through a study of sporopollen analysis. It mainly reflects the general regularity of global climatic change through contrasting with the pale environment in northern hemisphere. Our pollen record reveals a regional climate history similar to those from the neighboring sites, including the GISP2, the Guliya ice core and core RM in Zoige, and thus supports the notion that the Qinghai-Tibetan Plateau acts as an important link between climatic events in the North Atlantic realm and the Asian monsoon domain. The response of the Qinghai-Tibet Plateau to the global climatic change is relatively sensitive. © 2014 Geological Society of China. Source
Zhang B.,Inner Mongolia Mining Exploitation Co. |
Zhang B.,Shandong University of Science and Technology |
Gao Z.,Shandong University of Science and Technology |
Zhang F.,Inner Mongolia Mining Exploitation Co. |
And 3 more authors.
Earth Science Frontiers | Year: 2015
The hydrogeochemical zonations of geothermal water in North China Basin can be used to indicate the hydrodynamic zoning because the latter actively responded to the former. The quality of geothermal water is deteriorating and the deuterium-excess parameter decreases from surrounding mountains to the basin and from shallow to depth in North China Basin, suggesting that the rate of groundwater circulation become slower and slower. The distribution characteristics of high salinity zoning of geothermal water indicate that the Taihang Mountains and Yanshan Mountains in the west and north are predominant recharge area of geothermal water in North China Basin, while a small recharge amount is from the mountains in the southwest of Shandong Province. In addition, whether in the horizontal or vertical direction in the basin, the hydrogeochemical zonations also indicate that there is hydrodynamic equilibrium zone between the centripetal flow (infiltration original water) and acentric flow (sedimentary original water) of geothermal water in sandstone. This indicates that there is transient equilibrium between the centripetal flow and the acentric flow. © 2015, Editorial Office of Earth Science Frontiers. All right reserved. Source
Zhang B.-J.,Inner Mongolia Mining Exploitation Co. |
Zhang B.-J.,Shandong University of Science and Technology |
Zhang B.-J.,Shenhua Geological Exploration Co. |
Liu F.-Y.,Shenhua Geological Exploration Co. |
And 4 more authors.
Geology in China | Year: 2015
There are two kinds of physiotherapy geothermal mineral water developed in the northwest of Shandong Province, one referring to carbonate fissure-karst type and the other referring to sandstone fissure-pore type. The carbonate fissure-karst water belongs to Sr· F water, whereas the sandstone fissure-pore water belongs to Sr water and Br· Sr water. According to the analysis of the formation conditions of geothermal mineral water, the authors hold that the weathering crust and karst well-developed buried hill at the top of the Yanggu-Qihe uplift and depression are favorable prospecting target areas for carbonate fissure-karst geothermal mineral water, whereas the secondary structural zones near the deep faults within the North China depression and on the edge of the depression are favorable prospecting target areas for sandstone fissure-pore geothermal mineral water. Source