MAGNETOSTRATIGRAPHY OF PRECAMBRIANCAMBRIAN BOUNDARY AT MEISHUCUN SECTION, YUNNAN PROVINCE

来源 :中国科学:化学英文版 | 被引量 : 0次 | 上传用户:chrisbye
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Magnetostratigraphic studies of 112 cores specimens (249 samples) in a Precambrian-Cambrian section at Meishucun, Jinning County, Yunnan Province reveal the following: (ⅰ) Around the Sinian-Cambrian boundary in the Meishucun section existed a mixed polari
其他文献
In this paper the reaction of substituted β-nitrostyrene with O,O-dialkyl phosphite under cocatalysis of trimethylsilyl chloride (TMS-C1) and triethylamine (or ot
The runoff of the Huanghe contains a great amount of suspended load and forms the high-density underflows (hyperpycnal currents) at the river mouth. The sedimen
The hydroxyl groups and their acidic properties of AlPO<sub>4</sub>-5, SAPO-5 and HZSM-5 havebeen examined by means of IR spectroscopy using the adsorption of D
Four of Sr- O isotope types can be observed in the graphs of δ<sup>18</sup>O vs. (<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub> accord-ing to our data: (i) closed
The title compound was synthesized by extracting nranylchloride in HC1 system using dicyclohexyl-18-crown-6 as extraction agent. The absorption peaks 1090 cm<su
Erythromycin sensitive electrodes have been proposed. Their selectivity toward quaternary ammoniums is described in terms of induction effect and steric hindran
Deoxycorticosterone acetate, injected daily for 5, 10, 20 or 30 days, reduced the serum potassium levels of rats by about 25%, a decrease that was independent o
The structures of yingzhaosu C(3) and D(4) have been determined by spectroscopicanalysis in combination with chemical degradation.
The Meishucunian Stage is rich in fossils and is characterized by their distinct evolutionsequence, so based on the established zonation of small shelly fossils
The linear relationship between the chemical shift of the resenant nucleus and the localvan der Waals steric energy calculated by molecular mechanics with MM2 f