Spectroscopy and Spectral Analysis, Volume. 37, Issue 6, 1739(2017)
Study on the CL and FTIR Spectra of the Alluvial Diamond from Western Yangtze Craton and Its Significance in the Growth Rate Analysis of the Diamond
In order to provide scientific clues for reconstructing effectively the process of natural diamond growth, the diamond sample from the western Yangtze Craton is studied with CL and FTIR spectra. In the paper, the micro-section of growth of the sample was defined with CL spectra, while the growth time of each diamond section was determined with FTIR spectra; besides, the growth rate of the diamond section was calculated. The results of CL and FTIR spectra analysis of the sample show that there are early CL growth zonings which are terrace and jagged straight zonings and late CLre-growth zonings in the diamond. The concentration of nitrogen varies greatly from 4788~32189 μg·g-1 in the diamond which is type IaAB. The minimal crystalline temperature of the sample is 1 490 K. The residence time of the diamond section in the mantle depending on the positions varies greatly from 0264~46 Ga. The growth rate of the diamond section depending on the positions is 926~5 21818 μm·Ga-1. Furthermore, the growth of the different diamond section is heterogeneous with preferential direction.
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YANG Zhi-jun, ZHOU Wen-xiu, ZENG Xuan, HUANG Shan-shan, LI Xiao-xiao, CHEN Yao-ming. Study on the CL and FTIR Spectra of the Alluvial Diamond from Western Yangtze Craton and Its Significance in the Growth Rate Analysis of the Diamond[J]. Spectroscopy and Spectral Analysis, 2017, 37(6): 1739
Received: Jan. 4, 2016
Accepted: --
Published Online: Jul. 10, 2017
The Author Email: Zhi-jun YANG (yangzhj@mailsysueducn)