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1.
WANG Xiang CHEN Jianping XU Yanbo ZHENG Yongchun YAN Bokun WU Yunzhao 《《地质学报》英文版》2015,89(6):1882-1894
Spectra are sensitive in detecting main minerals on the lunar surface from visible light to infrared light. Since spectral characteristics of minerals are closely related to their compositions and the maturity level of soil on the Moon, studying the compositions and distribution of elements and minerals on the lunar surface can help to understand the evolution of the Moon through remote sensing technology. The correlation between the spectral characteristics of Chang’e-1 interference imaging spectrometry (IIM) reflectance images and the mineral contents of LSCC (Lunar Soil Characterization Consortium) lunar surface mineral samples was discussed and the spatial distributions of FeO and Al2O3 contained in both pyroxene and plagioclase on LQ-4 were studied using the improved angle parameter method, MNF, and band ratio statistics. A comparison of the mapping results of the optical models by Lucey, Shkuractov and other researchers on Clementine and the gamma ray spectrometry data shows that the content error is within 0.6% for lunar mare areas and close to 1% for the highland areas. The tectonic framework on the lunar surface was also investigated. And based on integrated analysis of previous findings on topography of the lunar surface, Chang’e LAM, CCD and LOLA images and the gravity anomalies data (Clementine GLGM-2), the tectonic unit subdivision was established for LQ-4, the idea of subdividing the lunar tectonic units was proposed, and this will provide a good foundation for studying the lunar tectonic evolution. 相似文献
2.
Chemical, petrological and mineralogical studies on 70017-291 Mare basalt indicate that the mare basalt belongs to Type B of A-17 basalts with a texture of plagioclasepoikilitic ilmenite basalt. The mean chemical composition of this basalt is as follows:SiO2 39.01, TiO2 11.32, Al2O3 9.24, FeO 18.52, MgO 8.61, CaO 10.86 (%). INAA measurements were made on the basalt for major, minor and trace elements. Seven pyroxene grains in the Apollo 17 were also analyzed by microprobe. They show two compositions, one for pigeonite, and the other for augite-subcalicaugite. The mean composition of pigeonite is Wo10.85, En59.33 Fs30, and that of augite-subcalic augite Wo25 En41.5Fs38.3. Plagioclase grains have a composition ranging from An30 to An96. The plagioclase contains detectable iron (averaging 0.74%), potassium (0.089% in average) and titanium(averaging 0.16%). The mean composition of ihnenite is TiO2 53.98%, FeO 41.02%,Al2O3 0.21%, MgO 2.41%, Cr2O3 0.74%. The Ti-high mare basalt (70017-291) was formed by partial melting of the early cumulates through assimilation and migmatization. On the whole, mare basalts seem to be of multigenesis. 相似文献
3.
DING Xiaozhong HAN Kunying PANG Jianfeng WANG Liang HAN Tonglin JU Yuanjing DING Weicui 《《地质学报》英文版》2013,87(6):1643-1657
Based on the CCD images,IIM data and DEM data of China＇s lunar exploration project （Chang＇E-Ⅰ） and related processed and analytic results,an integrated study of regional geology of Sinus Iridum and its adjacent area was conducted,and a series of relevant researches and analyses were carried out,including analysis of impact craters and their extrusive and accumulative materials,division of stratigraphic and tectonic units and classification of rock types,integrated analysis of chronology and lunar evolution history.In consideration of crater＇s shape features,quantity and preserving status of filling materials,the lunar impact craters can be divided into 7 types and 11 subtypes,and the accumulative materials of craters are divided into 6 types and 9 accumulative groups.According to the content and distribution of TiO2 and image characteristics,the basalts are divided into high-TiO2,medium-TiO2 and low-TiO2 basalts.Discussion was made on division of tectonic units and evolution features in the study area.The geological map of the Sinus Iridum Quadrangle （LQ-4） at a scale of 1∶2.5 M was preliminarily compiled with the ArcGIS system,and the spatial database of the map was established.Related technical specification,procedure and method for lunar geological mapping have been worked out,so as to lay a foundation for the forthcoming geological mapping of the global Moon in China by using the data of Chang＇E-Ⅱ and also for comprehensive study and geological mapping of other celestial bodies in the future. 相似文献
4.
U-Pb同位素体系的三阶段模式研究 总被引：2，自引：0，他引：2
By means of multi-dimensional regression analysis the author proposes for the first time the concept of “isochron plane” and develops two methods for solving three-stage U-Pb equations. Evolution of Nanling granites, metamorphic rocks fromthe Liaotung Peninsula and lunar basalts from Ocean Procellarum has been discussed in the light of U-Pb three.stage model calculations. The U-Pb third-stage modcl ages for these rocks are consistent with their K-Ar or Rb-Sr ages as well as with geological field observations. 相似文献
5.
LI Yongquan LIU Jianzhong ZOU Yongliao OUYANG Ziyuan ZHENG Yongchun YUE Zongyu 《《地质学报》英文版》2011,85(5):1016-1021
Two new lunar mare soil simulants, NAO-2 and NAO-3, have been created in National Astronomical Observatories (NAO), Chinese Academy of Sciences. These two simulants were produced from low-titanium basalt and high-titanium basalt respectively. The chemical composition, mineralogy, particle size distribution, density, angle of internal friction, and cohesion of both simulants have been analyzed, indicating that some characteristics of NAO-2 and NAO-3 are similar to those of Apollo 14 and Apollo 11 landing site soils. NAO-2 and NAO-3 will be of great benefit to the scientific and engineering research on lunar soil. 相似文献
6.
The most fundamental character of lunar soil is its high concentrations of solar-wind-implanted elements, and the concentrations and behavior of the noble gases He, Ne, Ar, and Xe, which provide unique and extensive information about a broad range of fundamental problems. In this paper, the authors studied the forming mechanism of lunar regolith, and proposed that most of the noble gases in lunar regolith come from the solar wind. Meteoroid bombardment controls the maturity of lunar soil, with the degree of maturation decreasing with grain size; the concentrations of the noble gases would be of slight variation with the depth of lunar soil but tend to decrease with grain size. In addition, the concentrations of noble gases in lunar soil also show a close relationship with its mineral and chemical compositions. The utilization prospects of the noble gas ^3He in lunar regolith will be further discussed. 相似文献
7.
The origin and geological significance of lunar ridges 总被引：3，自引：1，他引：3
YUE Zongyu OUYANG Ziyuan LI Haobin LIU Jianzhong WU Ganguo 《中国地球化学学报》2007,26(4):418-424
Lunar ridges are a kind of familiar linear structures developed on the lunar surface. The distribution pattern, formation mechanism and research significance of lunar ridges are discussed in this paper. Single lunar ridges are usually distributed in the form of broken lineation, and, as whole, lunar ridges are trapezoidal or annular in shape around the maria. As to the formation mechanism, only volcanism or tectonism was emphasized in the past, but the two processes are seldom taken into combined consideration. On the basis of detailed analyses, the authors thought that tectonism is a prerequisite for the formation of lunar ridges, while volcanism is the key factor controlling their particular shapes. Finally, the authors pointed out that it is very significant in the study of lunar ridges to link the course of lunar structure evolution with the stress state in the lunar crust. 相似文献
8.
J ianping C hen Yanbo X u X iang W ang S hujun H e D anping Y an S haofeng L iu Y ongliao Z ou Y ongchun Zheng 《地学前缘(英文版)》2014,5(2):227-235
The Sinus Iridum region, the first choice for China＇s＂Lunar Exploration Project＂is located at the center of the lunar LQ-4 area and is the site of Chang＇e-3 （CE-3）＇s soft landing. To make the scientific exploration of Chang＇e-3 more targeted and scientific, and to obtain a better macro-level understanding of the geotectonic environment of the Sinus Iridum region, the tectonic elements in LQ-4 region have been studied and the typical structures were analyzed statistically using data from CE-1, Clementine, LRO and Lunar Prospector missions. Also, the mineral components and periods of mare basalt activities in the study area have been ascertained. The present study divides the tectonic units and establishes the major tectonic events and sequence of evolution in the study area based on morphology, mineral constituents, and tectonic element distribution. 相似文献
9.
The Woniusi flood basalts from the Baoshan terrane, SW China, represent a signi?cant eruption of volcanic rocks which were linked to the Late Paleozoic rifting of the Cimmeria from the northern margin of East Gondwana. However, the precise mechanism for the formation and propagation of the rifting is still in debate. Here we report 40Ar/39Ar dating, whole-rock geochemistry, and Sr–Nd–Pb isotopes for the Woniusi basalts from the Baoshan terrane of SW China, with the aim of assessing if a mantle plume was related to the formation of the continent Cimmeria. 40Ar/39Ar dating of the Woniusi basalts yielded ages of 279.3 ± 1.1 Ma and 273.9 ± 1.5 Ma, indicating they were emplaced during the Early Permian. Whole-rock geochemistry shows that these basalts have subalkaline tholeiitic af?nity, low TiO2 (1.2–2.2 wt%), and fractionated chondrite-normalized LREE and nearly ?at HREE patterns [(La/Yb)N = 2.86–5.77; (Dy/Yb)N = 1.21–1.49] with noticeable negative Nb and Ta anomalies on the primitive mantle-normalized trace element diagram. The ?Nd(t) values (?4.76 to +0.92) and high (206Pb/204Pb)i (18.40?18.66) along with partial melt modeling indicates that the basalts were likely derived from a sub-continental lithospheric mantle (SCLM) source metasomatized by subduction-related processes. On the basis of a similar emplacement age to the Panjal basalts and Qiangtang mafic dykes and flood basalts in the Himalayas, combined with a tectonic reconstruction of Gondwana in the Early Permian, we propose that the large-scale eruption of these basalts and dykes was related to an Early Permian mantle plume that possibly initiated the rifting on the northern margin of East Gondwana. 相似文献
10.
山东临朐地区新生代玄武岩同位素钾-氩年龄研究 总被引：9，自引：0，他引：9
Isotopic determinations were made on basalts intercalated in the strata with abundant Upper Tertiary fossils. In order to satisfy the needs of K-Ar age determina.tions of younger basalts with lower potasium content, we have made some modifications on the China-made ZhT-1301 massspectrometer, Meanwhile, some improvements and refinements have been made as well on the mass-spectrometer and the argon-extraction system and argen-measureing technique. Our results are: 7.86---13.Sm.y. for the youngest basalts ; 20--24 m.y. for the Shanwang Group with abundant Miocene fossils;and: 44 m.y. for basalts from the lower part of the Shanwang Group. The chronological results are basically in agreement with the stratigraphic sequence. 相似文献