paleochannel 中文意思是什麼
paleochannel
解釋
古水道-
The alternative changes of paleoenvironment favored the formation and imbedding of brine, which is the source of salt - water intrusion ; and the paleochannel that formed during regressive of sea level is the path of salt - water intrusion
海進時期，大面積的濱海平原被淹沒，在近海平原窪地滯留的海水經過蒸發、濃縮變為鹵水，成為鹹水入侵的物源；海退後陸源碎屑在濱海地區沉積形成了巨厚的古河道砂層。 -
This paper introduces some effective prospecting methods including geologic, geochemical and geophysical, and drilling methods according to basic characteristics of paleochannel sandstone - type uranium deposit
鑒于古河道砂巖型鈾礦的特徵，本文介紹了幾種主要的地質、物化探及鉆探等勘查方法。 -
Abstract : the paleochannel sandstone - type uranium deposit which can be exploitated by low - cost in - situ leach technology is one of the most economic and competitive uranium resources in recent uranium industry
文摘:可採用低成本、原地浸出工藝開採的古河道砂巖型鈾礦是當今鈾工業中最具經濟價值和競爭力的鈾資源之一。 -
Prehistoric cataclysms and their impacts on human paleo - culture have been a focus of the scientists in the world. some ancient trees relatively undamaged back, roots and branches were unearthed from paleochannel in the peking university campus. the burying position, the characteristics and the age of the trees indicate that the flowage of ancient yongding river resulted in the event at about 5000a b p. the trees, together with the neolithic culture relic unearthed at the same time, show that the disastrous floods definitely occurred at about 5000a b p in peking area
史前時期的大洪水及其對人類古代文明的影響一直是中外學者共同關心的問題。北京大學校園內出土的埋藏古樹，其埋藏特徵和測年數據表明它們是5000a b p前後古永定河洪水泛濫的產物，與古樹同時出土的新石器時期文化遺物，提供了洪水給古代人類帶來重大災難的信息。 -
Desalting experiment of intensely salt - affected soil by planting rice in the da ' an paleochannel of the songnen plain
長期定位施肥殘留養分對作物產量及土壤化學性質的影響
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