The magmatic events in the North China Craton, Bayan Obo and Yanliao rifts are comparable, which probably related to the breakup of the Columbia supercontinent. Based on the new ages, together with published data of Proterozoic strata and magmatic events in Yanliao rift, we suggest that Dulahala and Jianshan formations should belong to Paleoproterzoic Changchengian System, equivalent to Statherian in International Clironostratigraphic Chart (ICC) Halahuogete Formation should be Mesoproterozoic Jixianian System, equivalent to Calymmian in ICC Bilute Formation should be Mesoproterozoic lower part of an awaiting build System, the same to Ectasian in ICC, and the Baiyinbaolage Formation should be Neoproterozoic Qingbaikouian System, which referred as Tonian in ICC.
LA-ICP-MS U-Pb dating yielded ages of 1670 ± 14Ma (MSWD = 1.6) for Jishengtai pluton and 1342 ☙Ma ( MSWD =0. pluton, while the one intruded into Bilute Formation is termed Dajingpo pluton. The gabbro intruded into Dulahala Formation is named Jishengtai. , 1001-1595, Acta Geodaetica et Cartographica Sinica. The VU Journal Publishing Guide shows you the most important scientific journals in your field, with their impact metrics, Open Access possibilities and APC. In the 57 years, it has been extensively approved by colleagues of surveying and mapping circles. Two gabbro plutons intruded into Bayan Obo Group were discovered through geological survey, whose zircon ages will provide new clues to constrain the controversial formation time of the Bayan Obo Group. Acta Geodaetica et Cartographica Sinica (AGCS) is the most authoritative periodical and the main documents in China Surveying and Mapping circles. The Bayan Obo Group outcropped in the Dajingpo, Siziwangqi, Inner Mongolia, is the eastern extension of Bayan Obo ore deposit. With the development of society, the influence of economic interests will become more and more prominent. (4) The land use change in Pyongyang is mainly driven by the three aspects of consumer demand, economic benefits and government decision-making.
Acta Geodaetica et Cartographica Sinica, 2013, 42(1): 44-50. On combining spectral, textural and shape features for remote sensing image segmentationJ. (3) In 2020, cultivated land in Pyongyang is still the main type of land use, but the area will be significantly reduced, and the artificial surface will continue to expand, becoming the main land area for area transfer. WU Zhaocong, HU Zhongwen, and ZHANG Qian. (2) In the first decade of 21st Century, the comprehensive utilization of land use in Pyongyang increased, the information entropy declined weakly, and the land use system remained in a stable and orderly state. Using Global Land30 standard product as data source, combined with CA-Markov model to quantitatively study the land use evolution of Pyongyang municipality in North Korea from 2000 to 2010 and simulate the land use situation of the region in 2020, the research found: (1) From 2000 to 2010, the area of forest land and bare land in Pyongyang was greatly reduced, and the cultivated land, grassland, water body and artificial surface increased to varying degrees, and the expansion of cultivated land area was the most significant.
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