氧的同位素 的英文怎麼說
中文拼音 [yǎngdetóngwèisù]
氧的同位素
英文
isotopes of oxygen-
Based on the avaliable isotope samples, we found that fon - lin alluvium, groundwater can be conceptually divided into three layers
此外由分析氫、氧同位素的組成，可定性地說明該區重要的水文循環特性。The understanding of biogeochemical cycle of hydrogen, oxygen, carbon, nitrogen, and sulfur elements in nature ecosystem have increased substantially in the past two decades owing to the improvement of gas isotope ratio mass spectrometer and the wide application of isotopic studies with these elements
摘要近20年由於氣相同位素比值質譜儀的改良和氫、氧、碳、氮和硫等穩定同位素的廣泛研究，穩定同位素的研究技術已實質增加我們對于這些元素在自然生態系中生地化循環的了解。From the study of hydrogen - oxygen isotope in enclosure liquid, some water conies from magma, others come from atmosphere precipitation
包裹體水的氫氧同位素研究表明成礦流體中既有巖漿水，又有大量大氣降水加入。Benthic foraminifer fauna, ams14c dating and acoustic sub - bottom profile was analyzed in the core ey02 - 2 and ey02 - 1 drilled from the muddy deposit in the middle southern yellow sea and the mid - shelf of north east china sea. considering the results of core qc2 ? dz4 and the standard oxygen isotope curves, we discussed the late - quaterenary paleo - environment evolution, benthic foraminifer fauna, paleo - climate, the climate events and water mass in postglacial period, average sedimentation rates, paleo - water depth, origin of sediments, average sea level rise rate in the shelf of south yellow sea and east china sea. at last we discussed the condition of sea level rise in the east china, green house effect and the protection of coastal zone
本文根據南黃海中部泥質區和東海中陸架的兩個鉆孔巖芯的古生物、 ams ~ （ 14 ） c測年、淺地層剖面等，參考qc _ 2 、 dz _ 4成果及標準氧同位素曲線探討了黃東海陸架晚第四紀古環境演化、底棲動物群特徵、古氣候、冰後期以來氣候事件、古水團、沉積速率、古水深、沉積物源、海平面平均上升率，討論目前中國東部海平面上升的狀況、溫室效應及海岸帶保護。Composed of micro diamonds, aluminum oxide, and silicon carbide, the isotopic distribution of these grains bore the telltale marks of their birth : ancient supernovas and red giant stars, that shone brightly and then flickered out, billions of years ago, before the birth of the solar system
由微金剛石、鋁氧化物、碳化硅組成的這些微粒的同位素分佈透露出它們的誕生：那些數十億年前，在太陽系尚未誕生時，曾經閃耀並最終熄滅的古老超新星和紅巨星。Researchers said the zircon ' s high level of heavy oxygen isotopes suggest it was cooled by surface water after it formed
研究人員說鋯石的高標準重氧同位素暗示了它形成之後靠地表水來冷卻。Compared c13 & o18 isotope analysis curve with lake level curve, further analyzed palaeoenvironment
通過分析、對比碳氧同位素曲線與湖平面升降曲線，對古沉積環境的變化規律有了進一步的認識。By comparing i8o curve with annual growth rate and grey level curve in the stalagmite during the same period, the author brings forward that that climate in shennongjia region mostly embodies matching modes of warm / wet, cold / dry over the past 2000 years, but temperature was out of harmony with precipitation in the course of climate transforming, which shows that shennongjia climate embodies matching modes of cold / wet, warm / dry at part period of time
近2000年中17次太陽活動和1400aad以來29次火山活動對氣候變化影響的印跡在石筍氧同位素中都有明顯的記錄，表明氣候事件與太陽活動、火山活動有較好的相關性。石筍各代用指標譜分析顯示126a 、 100a 、 81a 、 60a 、 40a 、 22a 、 11a等周期成分，也進一步支持了太陽活動對季風區短尺度氣候變化的驅動作用。Through the study of characteristic of macroelement, microelement, rare - earth element, oxyhydrogen isotope, sulfur isotope, lead isotope, fluid inclusion etc, a conclusion can be drawn that metallogenic substance comes from the upper mantle with mixing of some substance from the upper crust latter. it is likely to have the same source with the surrounding rock
通過對礦床的常量元素、微量元素、稀土元素、流體包裹體特徵、氫氧同位素、硫同位素、鉛同位素等特徵的研究，認為成礦物質主要來源於上地幔，與周圍巖石存在著同源的可能性，後期有一定的上地殼物質混入，成礦作用有三期，分別與區內的花崗巖、二長花崗巖脈、雲煌巖脈有關。Many research such as clay minerals, suspend in the sea, the grain size trend analysis of surface sediment, poc 6 cu and 8 c13 in bottom sediments etc. showed that : the yellow sea warm current divided the south yellow sea into two, the terrestrial material of modern sediment on the west shelf plain mainly came from the modem yellow river suspend carried by the alongshore current, and the sediment difference between the west and east side of yellow sea trough was represented by the sedimentation thickness in postglacial period, sedimentation stratum, and oxygen isotope record
粘土礦物、碳酸鹽、粗碎屑、海域懸浮體、表層沉積物粒度趨勢分析、 poc c ~ （ 13 ）及底質沉積物的c ~ （ 13 ）等多方面研究表明：以黃海暖流為主導，南黃海堆積陸架平原西側現代沉積物陸源物質主要源於黃海沿岸流攜帶的現代黃河懸移物質，黃海槽東西兩側的沉積差異主要表現在冰消期以來沉積厚度、沉積層序、氧同位素記錄上。Tree ring is a kind of natural archives, on which the isotopic analysis is important to study global climate and environmental change. the authors mainly provide a comprehensive introduction to the fractionation models of carbon, hydrogen and oxygen isotope in plants, their research techniques and the extract methods from cellulose. that results show isotopic tracer can record the message of climatic variation and has become a powerful tool for paleoclimate reconstruction and for the modern environment changing research. especially studying on pages, the cellulose isotopic analyses of imbedded old tree ring have become the mainly quantitative means of environmental evolvement. in addition, china is a typical monsoon country, research in tree ring stable isotope seasonal variation can give us a lot of important information on that. up to now, the research techniques and works on tree ring in our country are still in its earlier stage, and remain many limitations. it needs further accumulate basic research materials, intensify regional contrast and intercross studies on relative subjects
尤其是在過去全球變化pages研究中，埋藏古木纖維素中的碳氫氧同位素分析已成為環境演化研究的主要量化手段。另外，對于中國這樣典型的季風氣候國家，開展樹輪穩定同位素隨季節性變化的研究具有重要的意義。我國在樹輪研究方面起步較晚，研究方法和研究內容上也比較簡單，還存在不小差距，既要進一步積累基礎資料，又要做區域對比，加強與相關學科的交叉研究。The time corresponding to the four parts along the section are as follows : the top lake - swamp sediments : holocene ; the uppart fine sand : later late pleistocene ; the middlepart sandy clay : middle - early late pleistocene ; the lowpart clayer silt : later - middle - pleistocene. the fossils and stone artifacts found in salawusu site should be formed during the last but one glacier, its age range is about 0. 13 - 0. 19 ma, and belongs to later middle - pleistocene
分析q曲線與氧同位素曲線的一致性以及以上研究結果，包含薩拉烏蘇地層的這套沉積物的沉積時代為：頂部湖沼相沉積物：全新世；上部具交錯層理的細砂：晚更新世晚期；中部粉砂質粘土：晚更新世中期至早期；下部粘土質粉砂：中更新世晚期。During the " 10th 5 - year - project ", researches on the following techniques, new isotopic carrier, 5 parameters combination logging, oxygen activation logging, injection profile logging for polymer flooding, trace relative flow rate logging, and so on, have been carried out and some advanced and practical results have been obtained
「十五」期間開展了新型同位素載體、五參數組合測井技術、氧活化測井技術、聚驅注入剖面測井技術、示蹤相關流量測井技術等課題的攻關，取得了一批先進實用的技術成果。Carbon and oxygen isotopic composition ( 13c and 18o ) shows that the carbon not only derived from depth source but also sedimentary country rock
碳、氧同位素（ 13c和18o ）組成表明，既有沉積圍巖中的碳，也有深部來源的碳，具有混合來源特徵。Based on 16 230th dating ages and 1187 data of stable isotopic compositions as well as annual laminated sequences of the stalagmites, the author firstly presents the climate records of the past 2000 years in shennongjia region. by comparing the stalagmite record with historical records, lake sediments and pollen data, the author analyzes comparability and differences of climate change in east asia monsoon area and preliminarily investigates driven forces of climate change
基於16個~ （ 230 ） th年齡、 1187個氧碳同位素數據分析和顯微巖相研究，首次建立了神農架高海拔地區近2000年氣候演化序列，通過與歷史記錄、湖泊沉積、孢粉資料對比分析了東亞季風區不同地區氣候演化的相似性和差異性。C for climate changes in weiminghu lake, peking university since 1747a a. d
北京大學未名湖沉積物中公元1747年以來氣候變化的氧碳同位素記錄The records of 18o and 13c for climate changes in weiminghu lake, peking university since 1747a a. d. the records of
北京大學未名湖沉積物中公元1747年以來氣候變化的氧碳同位素記錄The most common isotope of oxygen, for example, has an atomic weight of 16, but there are also rarer isotopes with weights of 17 and 18, caused by additional neutrons in their nuclei
例如很常見的同位素氧，原子重量是16 ，但是還有更為稀少的重量為17和18的同位素，這是因為它們的原子核中有額外的中子。Carbon and oxygen stable isotopes in carbonates have long been the important geochemical tracers
碳酸鹽巖氧、碳同位素的研究是地球化學重要的示蹤手段之一。The analyses of oxygen and hydrogen isotope indicate that the hydrothermal fluid is dominated by magmatic water with input of a lot of meteoric and underground water in the later stage
包裹體的氧、氫同位素特徵表明，成礦熱液雖以巖漿水為主，但在晚期有較多天水及地下水的混入。分享友人