Ore-Forming Mechanism for the Hongshan Deposit in Yunnan Province, China

2014 ◽  
Vol 88 (s2) ◽  
pp. 957-958
Author(s):  
Bo ZU ◽  
Chunji XUE ◽  
Yi ZHAO

2014 ◽  
Vol 962-965 ◽  
pp. 296-299
Author(s):  
Guang Shu Yang ◽  
Yong Feng Yan ◽  
Peng Yu Feng ◽  
Jun Wei Zhang

Based on large scale geological mapping, geological-section, tectonic and geochemical studies on the carbonate-hosted Pb-Zn deposits in NE Yunnan, the metallogenic geological conditions are discussed, and the ore-prospecting indicators are summarized. The Pb-Zn deposits have many common features, which are mainly controlled by the thrust fault-fold structures and lithological conditions. The ore-forming mechanism of them is similar to the MVT Pb-Zn deposit. The combination of thrust fault-fold structures and altered carbonate rocks with geochemical anomalies are good indicators for prospecting.



Author(s):  
Uwe Lücken ◽  
Michael Felsmann ◽  
Wim M. Busing ◽  
Frank de Jong

A new microscope for the study of life science specimen has been developed. Special attention has been given to the problems of unstained samples, cryo-specimens and x-ray analysis at low concentrations.A new objective lens with a Cs of 6.2 mm and a focal length of 5.9 mm for high-contrast imaging has been developed. The contrast of a TWIN lens (f = 2.8 mm, Cs = 2 mm) and the BioTWTN are compared at the level of mean and SD of slow scan CCD images. Figure 1a shows 500 +/- 150 and Fig. 1b only 500 +/- 40 counts/pixel. The contrast-forming mechanism for amplitude contrast is dependent on the wavelength, the objective aperture and the focal length. For similar image conditions (same voltage, same objective aperture) the BioTWIN shows more than double the contrast of the TWIN lens. For phasecontrast specimens (like thin frozen-hydrated films) the contrast at Scherzer focus is approximately proportional to the √ Cs.



2017 ◽  
Vol 25 (1) ◽  
pp. 43
Author(s):  
Qi Shuo ◽  
Yu Guo-hua ◽  
Lei Bo ◽  
Fan Yi ◽  
Zhang Deng-lin ◽  
...  
Keyword(s):  




2008 ◽  
Vol 16 (4) ◽  
pp. 369 ◽  
Author(s):  
Zhao Jinli ◽  
Ma Youxin ◽  
Zhu Hua ◽  
Li Hongmei ◽  
Li Wenjun ◽  
...  




2011 ◽  
Vol 31 (5) ◽  
pp. 73-78
Author(s):  
Huijun LI ◽  
Xunhua ZHANG ◽  
Shuyin NIU ◽  
Kaining YU ◽  
Aiqun SUN ◽  
...  


2008 ◽  
Vol 29 (3) ◽  
pp. 334-334
Author(s):  
Tian-hao WEI
Keyword(s):  


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