游牧阿尔山，风吹草低见牛羊

阿尔山,坐落在中国东北隅。千百年来,那里得上天眷顾,汇集草原、森林、高山湖泊、火山遗迹、地热温泉等诸多宝贵资源于一身。流金9月,我们一行8人、2辆车,从北京出发,自驾前往阿尔山。 7天地旅程,蓝天里漂浮的云朵,草原上悠然的羊群,天池畔夕阳的余晖,水塘边薄雾的清晨……美景定格成画面、随着行程徐徐展开,大概,这就是自驾的好处吧,自由、惬意、不经意间,就与风景正面相对。     

去成县目睹“陇上江南”迷人风采

成县位于甘肃省南部的陇南市,西北高,东南低,海拔在750～2377米之间,境内多高山峡谷,地貌特征南北为山地,中部为丘陵。属暖温带半湿润气候,四季分明,冷暖适度,年均气温11.7℃。成县生态环境良好,自然景观奇特,文化胜迹众多,风光秀丽,山水有致。有国家级重点保护文物汉隶     

某高山大型深井桩地网的设计与实施

通过某高山地区因地制宜的地网设计,结合地网所处的地质等实际情况综合考虑采取各种经济实用的降阻措施,理论计算和实际测试的吻合,工程预算与竣工结算的一致,实现设计到施工的过程     

草盛期不同类型高寒草甸CO2释放速率的比较研究

Potentilla fruticosa scrub, Kobresia humilis meadow and Kobresia tibetica meadow are widely distributed on the Qinghai-Tibet Plateau. During the grass exuberance period from 3 July to 4 September, based on close chamber-GC method, a study on CO2 emissions from different treatments was conducted in these meadows at Haibei research station, CAS. Results indicated that mean CO2 emission rates from various treatments were 672.09±152.37 mgm^-2h^-1 for FC (grass treatment); 425.41±191.99 mgm^-2h^-1 for FJ (grass exclusion treatment); 280.36±174.83 mgm^-2h^-1 for FL (grass and roots exclusion treatment); 838.95±237.02 mgm^-2h^-1 for GG (scrub+grass treatment); 528.48±205.67 mgm^-2h^-1 for GC (grass treatment); 268.97±99.72 mgm^-2h^-1 for GL (grass and roots exclusion treatment); and 659.20±94.83 mgm^-2h^-1 for LC (grass treatment), respectively (FC, FJ, FL, GG, GC, GL, LC were the Chinese abbreviation for various treatments). Furthermore, Kobresia humilis meadow, Potentilla fruticosa scrub meadow and Kobresia tibetica meadow differed greatly in average CO2 emission rate of soil-plant system, in the order of GG>FC>LC>GC. Moreover, in Kobresia hurnilis meadow,heterotrophic and autotrophic respiration accounted for 42% and 58% of the total respiration of soil-plant system respectively, whereas, in Potentilla fruticosa scrub meadow, heterotrophic and autotrophic respiration accounted for 32% and 68% of total system respiration from GG; 49% and 51% from GC. In addition, root respiration from Kobresia humilis meadow approximated 145 mgCO2m^-2h^-1,contributed 34% to soil respiration. During the experiment period, Kobresia humilis meadow and Potentilla fruticosa scrub meadow had a net carbon fixation of 111.11 gm^-2 and 243.89 gm^-2 respectively. Results also showed that soil temperature was the main factor which influenced CO2 emission from alpine meadow ecosystem, significant correlations were found between soil temperature at 5 cm depth and CO2 emission from GG, GC, FC and FJ treatments. In addition, soil moisture maybe the inhibitory factor of CO2 emission from Kobresia tibetica meadow, and more detailed analyses should be done in further research     

Minerogenic Theory of the Superlarge Lop Nur Potash Deposit, Xinjiang, China

Located in the eastern part of the Tarim basin, Xinjiang, the Lop Nur was an ultimate water catchment area of the Tarim basin during the Quaternary. Through nearly ten years of investigation and research, the authors have found a superlarge brine potash deposit in the Luobei subbasitv—a secondary basin of the Lop Nur depression. The deposit has been mined now. On that basis, the authors propose new theories on the genesis of the potash rock deposit. In the tectonic and geomorphologic contexts, the Tarim basin lies in a “high mountain-deep basin” environment. At the beginning of the Quaternary, influenced by the neotectonic movement, the Lop Nur evolved into a “deep basin” in the Tarim basin. At the end of the middle Pleistocene, neotectonic migration began to take place in the interior of the Lop Nur and a new secondary deep basin—the Luobei subbasin—formed gradually. Despite its small area, it is actually the deepest subbasin in the Lop Nur depression, where brines of the Lop Nur Salt Lake gather and evaporate, thus providing materials for the formation of a superlarge brine potash rock deposit. With respect to the phenomenon of brine concentration and change with deepening of the lake, the authors propose a model of “high mountain-deep basin” tectonic migration for potash concentration. In the sedimentological context, the honeycomb-shaped voids developed in glauberite rock in the subbasin are good space for potash-rich brine accumulation. Study indicates that the deposition of glauberite requires recharge of calcium-rich water.In the Tarim area the calcium-rich water might come from deep formation water or oilfield water, and the river water recharging the Lop Nur Salt Lake was rich in sulfate radicals and other components; in addition, the climate in the area was very dry and the brine evaporated steadily, thus resulting in deposition of substantial amount of glauberite, potash accumulation in intercrystal brine and final formation of the potash deposit. Generally, potash formation in a salt lake undergoes a three-stage process of “carbonates→sulfates (gypsum and glauberite)→chlorides (halite etc.)”, but in the study area there only occurred a two-stage process of “carbonates→sulfates (gypsum and glauberite)”. The authors call this new geological phenomenon the “two-stage potash formation” model. In conclusion, the superlarge Lop Nur potash deposit is the result of combined “high mountain-deep basin” tectonism and “two-stage potash formation”.     

秦岭太白山1980年秋季的小气候特点

我们于1980年9月12日至10月1日在秦岭主峰太自山南北坡不同高度设置了四个测点进行小气侯观测。测点布置如图1所示。     

高山林线植物的光合作用--与刘鸿雁等先生商榷

随着海拔的升高,高山森林立地的气温逐渐降低,最终形成分布的不连续,林线就是森林分布的上线。温度与林线形成的关系非常密切,此外,水分状况、地形、土壤养分及其它干扰因素也影响林线的形成[1～3]。对林线的认识虽然存在一定的差异,但还是形成了许多相近的观点。从热带到极地,林线的海拔高度与纬度的变化呈负相关,林线林木生长季的长短也与纬度的变化呈负相关。在20°N、46°N和68°N,林线高度分别是海拔4000m(Orizaba)、2350m(Alps)和420m(NortherScandes),生长季分别有7～8个月、5个月左右和2～3个月。由于林线结构和功能特殊,引起了…     

高山峡谷区快速评价找矿靶区的化控方法技术

根据在滇西燕子洞矿段的化探方法技术试验研究结果，将水化学测量作为高山峡谷区靶区三级查证的方法，并对常规水系沉积物测量，土壤测量的工作方法进行了调整，试点测量结构表明，找矿效果良好，工作效率大幅度提高。     

超乎想象的壮丽 前所未见的中国 《航拍中国》第二季来袭 再来一场天际遨游

"我们的旅程从西北端的高原开始,然后深入高山峡谷,发现举世无双的人间仙境,翻越雪山,随滔滔江水,去见识一座奇迹般的古代工程……"不久前,暌别两年回归的高分纪录片《航拍中国》第二季在中央9套纪录频道正式播出,每集50分钟的云霄旅程,再次带领我们来了一场壮阔非凡的天际遨游。风光秀美的千岛湖、九曲黄河的第一湾、势恢宏的港珠澳大桥、高楼林立的城市中心……《航拍中国》第二季在创作上总体延续了第一季的基调和风格以及地点布局.