Since 2012,some advances have been made through the resource investigation,metallogenesis research,and comprehensive utilizing of lithium deposits in China.Firstly,the progress of lithium exploration has been made in ...Since 2012,some advances have been made through the resource investigation,metallogenesis research,and comprehensive utilizing of lithium deposits in China.Firstly,the progress of lithium exploration has been made in Sichuan,Xinjiang,Qinghai and Jiangxi provinces(autonomous region).Li deposits are not only found within the pegmatite rocks but also within the granitic rocks and sedimentary rocks.Secondly,the methods of geological survey,geochemical and geophysical exploration,remote sensing technology and even drilling technology have been improved,which can be delineating orebodies quickly.Thirdly,the mechanisms of Li mineralization were summarized by analyzing the relationship between the Li contents and kinds of geological phenomena.Based on practice,a new understanding of"multi-cycle,deep circulation,integration of internal and external"metallogenic mechanism or"MDIE"metallogenic mechanism for short has been put forwarded further in this paper,and the"five levels+basement"exploration model has been successfully expanded to guide the prospecting work both in the Jiajika and Keeryin pegmatite ore fields in western Sichuan Province.Besides,new progress has been made in the aspect of amblygonite deposits of granite-type and hydrothermal type in the Mufushan-Jiuling ore district,which points out a new direction for prospecting new types of lithium deposits in China.展开更多
Due to the increasing opportunities for face-to-face communication, students should be able to understand utterances in a particular context. Grice’s conversational implicature theory, mainly consisting of the cooper...Due to the increasing opportunities for face-to-face communication, students should be able to understand utterances in a particular context. Grice’s conversational implicature theory, mainly consisting of the cooperative principle and the maxims, purports to explain what is conveyed by an utterance. Austin and Searle’s speech act theories contribute to the functional explanation of language and explore the illocutionary acts beyond the literal meaning of utterances. With these theories as the theoretical framework, the author proposes a way to improve students’ ability to interpret utterances, that is, teaching theories of conversational implicature and speech act, creating an appropriate and plausible context and inculcating cultural knowledge of the target language.展开更多
基金This research has been supported by the China National Key Research and Development Program during the“13th Five-year Plan Period”(2017YFC0602700)the Geological Survey Projects of China Geological Survey(DD20160056,DD20160346)the Major Project of National Social Science Fund“Research on the supply risk management mechanism for China’s strategic three-rare mineral resources”(19ZDA111).
文摘Since 2012,some advances have been made through the resource investigation,metallogenesis research,and comprehensive utilizing of lithium deposits in China.Firstly,the progress of lithium exploration has been made in Sichuan,Xinjiang,Qinghai and Jiangxi provinces(autonomous region).Li deposits are not only found within the pegmatite rocks but also within the granitic rocks and sedimentary rocks.Secondly,the methods of geological survey,geochemical and geophysical exploration,remote sensing technology and even drilling technology have been improved,which can be delineating orebodies quickly.Thirdly,the mechanisms of Li mineralization were summarized by analyzing the relationship between the Li contents and kinds of geological phenomena.Based on practice,a new understanding of"multi-cycle,deep circulation,integration of internal and external"metallogenic mechanism or"MDIE"metallogenic mechanism for short has been put forwarded further in this paper,and the"five levels+basement"exploration model has been successfully expanded to guide the prospecting work both in the Jiajika and Keeryin pegmatite ore fields in western Sichuan Province.Besides,new progress has been made in the aspect of amblygonite deposits of granite-type and hydrothermal type in the Mufushan-Jiuling ore district,which points out a new direction for prospecting new types of lithium deposits in China.
文摘Due to the increasing opportunities for face-to-face communication, students should be able to understand utterances in a particular context. Grice’s conversational implicature theory, mainly consisting of the cooperative principle and the maxims, purports to explain what is conveyed by an utterance. Austin and Searle’s speech act theories contribute to the functional explanation of language and explore the illocutionary acts beyond the literal meaning of utterances. With these theories as the theoretical framework, the author proposes a way to improve students’ ability to interpret utterances, that is, teaching theories of conversational implicature and speech act, creating an appropriate and plausible context and inculcating cultural knowledge of the target language.
