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The age of individual analysis for zircon from the diorite unit ranges from (137±2) Ma to (1 58 士2) Ma, with a weighted average of (147.7±2.0) Ma, whereas that of the monzonitic porphyry ranges from (115±2) Ma to (164±3) Ma, with a weighted average of (144.5±8.9) Ma.

其中的闪长岩单元年龄为(137±2)~(158±2)Ma,加权平均年龄为(147.7±2.0)Ma,二长花岗斑岩为(115±2)~(164±3)Ma,加权平均为(144.5±8.9)Ma。

Seven molybdenite samples from greisen ore body and quartz vein tungsten ore body associated with black tungsten ore were chosen for Re-Os isotopic dating and model age of (141.4±2.2) Ma~(158.2±2.2) Ma were obtained. The isochrone age of molybdenites from greisen type tungsten-tin ore body is (156.8±3.9) Ma, which indicates that its mineralogenetic epoch is at the Middle Jurassic, corresponds to the second stage of early Yanshanian period. And the model age for the samples from greisen ore body and from quartz vein ore body are (150.7±2.4) Ma~(158.2±2.2) Ma and (141.4±2.2) Ma~(151.0±2.4) Ma respectively, which indicates that the mineralization time of the quartz vein ore body is slightly earlier than that of greisen ore body.

文章选取云英岩型矿体及上部石英脉型钨矿体中与黑钨矿共生的辉钼矿7件,进行Re-Os等时线年龄测定,得到其模式年龄为(141.4±2.2) Ma~(158.2±2.2)Ma,其中云英型钨锡矿体中辉钼矿等时线年龄为(156.8±3.9)Ma,成矿时代为中侏罗世,对应于燕山早期第二阶段;从云英岩矿体中样品模式年龄为(150.7±2.4)Ma~(158.2±2.2)Ma,石英脉型矿体中样品模式年龄为(141.4±2.2)Ma~(151.0±2.4)Ma。

Block milliampere when be being set in 100 ma of large central issue, 200 ma, 300 ma, 400 ma, 500 ma respectively, wait to all appear identical breakdown.

将毫安挡位分别设在大焦点100 ma、200 ma、300 ma、400 ma、500 ma时等均出现相同故障。

Using CHIME geochronological method, the zircons and monazites from the Caoshan and Lishugou plutons are dated. The PbO-UO2* isochron age and weighted average age of the Lishugou pluton are all (173±10) Ma. For the Caoshan pluton, the zircon PbO-UO2* and monazite PbO-ThO2* isochron ages are (178±8) Ma and (177±3) Ma, and their weighted average ages are (175±6) and (177±3) Ma, respectively.

运用CHIME年龄测定方法对草山和梨树沟岩体中的锆石和独居石进行了年代学研究,获得梨树沟岩体锆石PbO-UO2*等时线年龄和权重平均年龄均为(173±10)Ma,草山岩体锆石PbO-UO2*和独居石PbO-ThO2*等时线年龄分别为(178±8)Ma和(177±3)Ma,权重平均年龄分别为(175±6)Ma和(177±3)Ma。

Apart from the amphibolite enclaves and dyke swarms, the isotopic ages of the magmatic intrusions have been measured. The magmatic sequence and geochronologic framework are as follows: Quartz monzonite, 1825 ± 23 Ma, TDM = 2920Ma; Throndhjemite, 2374 ± 10 Ma, TDM = 3460 Ma; Tonalite, 2604±102 Ma, TDM = 3063 Ma; Monzonite, 3096±17 Ma, TDM = 2978 Ma; Granite, 3605±43 Ma, TDM = 3528 Ma.

在野外建立热事件相对序列的基础上,通过单颗粒锆石U-Pb法测年和Sm-Nd同位素示踪研究,初步建立了该区早前寒武纪岩浆活动的年代格架:石英二长岩:1825±23 Ma,TDM=2920 Ma;奥长花岗岩:2374±10 Ma,TDM=3460 Ma;英云闪长岩:2604±102 Ma,TDM=3063 Ma;二长花岗岩:3096±17 Ma,TDM=2978 Ma;花岗岩:3605±43 Ma,TDM=3528 Ma。

The plateau ages of three phlogopite samples from the Bailashui ore district are (150.6±1.0) Ma,(157.3±1.0) Ma and (154.7±1.1) Ma, respectively; and the plateau age of hydrothermal hornblende from the same mining district is (156.9±1.1) Ma.

研究结果表明,白腊水矿区3个金云母样品的40Ar/39Ar坪年龄分别为(150.6±1.0)Ma、(157.3±1.0)Ma和(154.7±1.1)Ma;热液成因角闪石的坪年龄为(156.9±11)Ma。

The research leads to following conclusions: A The age of the ferromanganese contacting with the upper phosphate layer is 14.9 Ma; B The crust had been grown continually without sedimentation interruption since 14.9 Ma, suggesting that it can be used to rebuild the environment of palaeo-ocean and palaeo-climate from 14.9 Ma to 0 Ma; C The sedimentation interruption between the ferromanganese and the upper phosphate layer lasted around 4 Ma; D Between 19 Ma and 22.7 Ma, great phosphatization event happened in this area, which might cause the sedimentation interruption from 22.7 Ma to 14.9 Ma; E The ferromanganese crust began to grow from 75 Ma.

对超微量Sr同位素测试得到的富钴结壳磷酸盐年龄进行分析认为:(1)上部富钴结壳与上层白色磷酸盐化层接触部位的年龄为14.9 Ma;(2)自14.9 Ma以来,结壳的生长是连续的,沉积间断发生的可能性非常小,该样品可以用来进行14.9 Ma年以来古海洋、全球变化的重建工作;(3)上层白色磷酸盐化层与其上部的富钴结壳之间存在4 Ma的沉积间断;(4)19 Ma~22.7 Ma左右在该区发生过大规模的磷酸盐化作用,磷酸盐化作用可能造成磷酸盐化时期(19 Ma~22.7 Ma)和之后4 Ma(19 Ma~14.9 Ma)富钴结壳的沉积间断;(5)结壳的初始生长年龄在75 Ma左右;(6)老结壳的生长速度要远低于新结壳的生长速度。

Using the latest paleontological, magnetostratigraphic and chronological data and the lasting time of the high-resolution sequences, the authors have made a detailed chronostratigraphic division of the Jixi Group and determined the Jixi Group formed in the Early Cretaceous early Valaginian to middle Albian. In the group, the Didao Formation formed at 130.9±128.3 Ma, the Chengzihe Formation at 125.1±116 Ma, the Muling Formation at 116±106.9 Ma, and the Dongshan Formation at 106.9±101.7 Ma.

提要:利用最新的古生物、磁性地层年代资料及高分辨率层序延续时间推算,对鸡西群进行了精细的年代地层划分,确定了鸡西群形成时间为早白垩世凡兰吟早期—阿尔布中期,其中滴道组形成时间为130.9~128.3 Ma,城子河组形成时间为125.1~116 Ma,穆棱组形成时间为116~106.9 Ma,东山组形成时间为106.9~101.7 Ma。

Two episodes of uplifting in Jianghan basin occurred within 157~97Ma and 10~0 Ma; Xiang′exi-Wuling region and Qianzhong hights experienced an uplifting of 137~0 Ma; Exiyudong, Chuandong folds and Chuandongnan regions, 97~0 Ma; Chuandongbei and Chuanzhong regions, 56~0 Ma; Chuanxi and Dianxi areas 23~0 Ma. The general trend is that the onsets of uplifting for different tectonic units in the Mid-upper Yangtze area decrease westward.

江汉盆地在157~97Ma和10 Ma以来发生了两期大规模抬升剥蚀;湘鄂西—武陵地区、黔中隆起自137Ma开始持续抬升剥蚀;鄂西渝东、川东褶皱带从97 Ma开始持续抬升剥蚀;川东北和川中地区于56 Ma才开始遭受抬升剥蚀;川西—滇西地区则自23 Ma以来经历了较大规模的抬升剥蚀。

Two episodes of uplifting in Jianghan basin occurred within 157~97Ma and 10~0 Ma; Xiang′exi-Wuling region and Qianzhong hights experienced an uplifting of 137~0 Ma; Exiyudong, Chuandong folds and Chuandongnan regions, 97~0 Ma; Chuandongbei and Chuanzhong regions, 56~0 Ma; Chuanxi and Dianxi areas 23~0 Ma.

江汉盆地在157~97Ma和10 Ma以来发生了两期大规模抬升剥蚀;湘鄂西—武陵地区、黔中隆起自137Ma开始持续抬升剥蚀;鄂西渝东、川东褶皱带从97 Ma开始持续抬升剥蚀;川东北和川中地区于56 Ma才开始遭受抬升剥蚀;川西—滇西地区则自23 Ma以来经历了较大规模的抬升剥蚀。

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相关中文对照歌词
Told My Ma
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Look Ma
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Ma Jeunesse Fout Le Camp
Ma Ma Ma
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