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Phototropism of Petrified Wood and Its Relation with the Rotation of Different Blocks in China and the Possibility of Application in the World
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作者 zikun jiang Benpei Liu +6 位作者 Yongdong Wang Min Huang Tom Kapitany Ning Tian Yong Cao Yuanzheng Lu Shenghui Deng 《Open Journal of Geology》 2019年第10期585-588,共4页
Normally, trees on the side directly exposed to sunlight will grow faster than the opposing side. This phenomenon is termed plant phototropism. Moreover, palaeomagnetists have revealed that the Junnar Block has never ... Normally, trees on the side directly exposed to sunlight will grow faster than the opposing side. This phenomenon is termed plant phototropism. Moreover, palaeomagnetists have revealed that the Junnar Block has never rotated since the Mesozoic. The petrified woods in the Jiangjunmiao area of Qitai County show the positive phototropism direction of SSW220. By compared with the modern normal growth stumps in plain area, which have positive phototropism direction of SSW 219 ± 5, this observation supports the conclusion of palaeomagnetic researchers: the Junggar basin has never rotated since the Late Jurassic. 展开更多
关键词 JURASSIC Petrified WOOD PHOTOTROPISM Plate ROTATION PALAEOGEOGRAPHY
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Preliminary study on Late Triassic to Early Jurassic strata and floral variation in Hechuan region of Chongqing,southern Sichuan Basin
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作者 Ning TIAN Yongdong WANG +2 位作者 Xiaoju YANG Qing NI zikun jiang 《Global Geology》 2008年第3期125-129,共5页
The end-Triassic mass extinction event is extensively known, however, the terrestrial response of this event is still poorly understood. Here we briefly report our preliminary results on the variation of floral divers... The end-Triassic mass extinction event is extensively known, however, the terrestrial response of this event is still poorly understood. Here we briefly report our preliminary results on the variation of floral diversity through the Triassic/Jurassic boundary deposits in the Tanha section of Hechuan region, Chongqing, southern China. It is recognized that the floral hiodiversity of the Hechuan region shows a distinct change through the Triassic and Jurassic transition; and the floral diversity loss reaches up to 92. 5% at species level. Meanwhile, in northeastern region of the Sichuan Basin, the floral diversity declines by about 50% across the T/J boundary at species level with a remarkable turnover of genera and species. The potential reasons and mechanisms that cause the floral diversity differentiation of the T/J boundary in the Sichuan Basin are briefly discussed in this note. 展开更多
关键词 Triassic/Jurassic boundary mass extinction floral variation Hechuan southern Sichuan Basin
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Preliminary investigations on fossil diversity variation of Mesozoic Marattialean ferns in China
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作者 zikun jiang Yongdong WANG Ning TIAN 《Global Geology》 2008年第3期130-134,共5页
The Marattiales is one of the oldest lineages of vascular plants with extensive fossil records dated back to the Carboniferous. Understanding the fossil diversity variation and distribution pattern is helpful for expl... The Marattiales is one of the oldest lineages of vascular plants with extensive fossil records dated back to the Carboniferous. Understanding the fossil diversity variation and distribution pattern is helpful for exploring the evolutionary history of this fern group. In this work, the preliminary analysis of diversity change and distribution of the Mesozoic Marattialean fossil records in China are reported covering the Triassic and Jurassic periods based on available published data. In addition, a brief discussion is made regarding to the potential causes for these variation and distribution of this fern group. 展开更多
关键词 diversity variation MESOZOIC Marattiales
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2020年度地球科学领域地质学学科基金项目评审与成果分析 被引量:4
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作者 任建国 初航 +4 位作者 吕大炜 李秋根 王有功 蒋子堃 周鹏鹏 《地球科学进展》 CAS CSCD 北大核心 2020年第11期1148-1153,共6页
分析了2020年度国家自然科学基金委员会地球科学部地质学科所管理的面上项目、青年科学基金项目、地区科学基金项目、重点项目、国家杰出青年科学基金项目和优秀青年科学基金项目等的申请、评审和资助情况,以及4类科学问题属性项目的申... 分析了2020年度国家自然科学基金委员会地球科学部地质学科所管理的面上项目、青年科学基金项目、地区科学基金项目、重点项目、国家杰出青年科学基金项目和优秀青年科学基金项目等的申请、评审和资助情况,以及4类科学问题属性项目的申报情况;并对2020年1月提交的项目报告进行了审核,对2019年底结题的报告进行了总结。 展开更多
关键词 地质学 项目评审 项目进展 报告审查 成果分析
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