(1) Introduction to the laboratory
The Key Laboratory of Salt Lake Resources and Environment of the Ministry of Land and Resources is mainly engaged in the investigation and evaluation of salt lakes and salt minerals, salt lake biological resources, mineralization laws and development and utilization Research, including studies on the response of salt lake records to global change. The laboratory currently has 28 employees, including 1 academician, 7 researchers, 9 associate researchers and senior engineers. The director of the laboratory is Academician Zheng Mianping, a salt lake expert. There are three salt lake field scientific observation stations in the Tibet Autonomous Region. It currently undertakes 33 national, provincial and ministerial level and natural fund projects, and has completed hundreds of national, provincial and ministerial level projects. He has won many awards such as the first and second prizes of the National Science and Technology Award and the National Science Conference Award, and has made outstanding contributions to the investigation, evaluation and industrialization of my country's salt lake resources.
(2) Important scientific research results in 2013
1. Favorable areas for salt formation and potassium discovery were discovered in the Paleogene salt basin in southwestern Yunnan
In Yunnan, through implementation Well MK-1 was drilled and core researched. It was found that the 2253-2323m salt layer (vertical thickness 70m) is mainly composed of variegated gravel-like rock salt, gray-red rock salt, gray-black rock salt with gray-red strips, and variegated anhydrite. Breccia contains potassium rock salt and gray-black rock salt. The KCl content is 0.8% to 6%, and mainly 2% to 3.6%; the bromine and chlorine coefficient is 0.1 to 0.6, and some parts are higher and have reached the potash salt deposition stage (Figure 54).
Figure 54 Borehole core characteristics of Well MK-1
According to the deployment of 1:50,000 gravity detection results and high-precision electromagnetic spectrum (MES) detection, the well located in Mengye The area in Liming Township, Ning'er County, Pu'er City in the northwest direction is a favorable area for salt formation and potassium search, with the main burial depth ranging from 500 to 1500m. Combined with the characteristics of the salt structure of the potassium salt deposit in the Mengyejing mining area, the analysis shows that multi-stage fracture activity is the dominant mechanism for the formation of salt structures.
2. Major discovery of marine fossils in the upper part of the Linxi Formation of the Late Permian in the Xingmeng region
The final closure of the ancient Asian Ocean in the Xingmeng region and the folding and uplift of the Xingmeng Trough The era is a major geological issue that has been debated for a long time in the geoscience community. The focus of the debate is the Late Permian tectonic-palaeogeographic environment represented by the Linxi Formation.
Predecessors generally believed that the Late Permian in the Xingmeng area was continental sedimentary. This time, typical marine fossils such as multi-layered limestone and a large number of bryozoans were discovered for the first time in the upper part of the Late Permian Linxi Formation in the Guandi section of Linxi County, Inner Mongolia, indicating that this area was still a marine deposit in the late Late Permian. This major discovery made by the scientific research team of researcher Zhang Yongsheng of the laboratory was published in the 33rd issue of "Science Bulletin" in 2013 (Figure 55).
Figure 55 Field outcrops and marine fossil production locations of the Lin4 and Lin5 members of the upper Linxi Formation in the Guandi section of Linxi County in eastern Inner Mongolia