Integrating Geochemical and Geophysical Method in Coexistence of Oil and Potassium to Identify K-rich Brine:Research and Application in Southwestern Sichuan

正Lithology of Triassic in southwestern Sichuan is consistent with the whole basin,and there is no discussion about stratum division,the difference is stratum denudation which is made by the uplifting of Luzhou uplift,especially     

A Comparative Analysis of Evaporate Sediments on Earth and Mars：Implications for the Climate Change on Mars

The knowledge of Martian salts has gone through substantial changes during the past decades. In the 70th of last century, Viking landers have noticed the existence of salts on Mars. Several salt species have been suggested from then on, such as sulfates and chlorides. However, their origin was a mystery due to the lack of observations. The recent explorations and related studies at the beginning of this century revealed that the crustal composition of Mars is similar to that of Earth, and it was hypothesized that almost one third of Martian surface was covered by oceans and lakes in the early stage of Mars. The huge water bodies may have dissolved a large quantity of ions from Martian primary rocks during the whole Noachian and Hesperian epoch. After the enormous drought event happened during the late Hesperian and the early Amazonian, these dissolved ions have formed huge salts deposits and most of them were preserved on Mars until today. To date, carbonates, sulfates, chlorides have all been detected by orbital remote sensing and by landers and rovers. However, the salt mineral assemblages on Mars seems to have some differences from those on Earth, e.g., rich in sulfates and lack of massive carbonates. To explain this difference, we propose that most of the surface carbonates precipitated from the ancient oceans may have been dissolved by the later ubiquitous acidic fluids originated from the global volcanism in the Hesperian era, and formed the enormous sulfate deposits as detected, and this hypothesis seems to be supported by the evidence that most of the sulfate deposits distribute around the Tharsis volcanic province while the survived carbonates located far from it. This process can release most of the carbon on Mars to the atmosphere in the form of CO2 and then be erased by the late heavy bombardments, which might have profound influence on the climate change happened in the Hesperian age. The positive correlation between the GRS results of the potassium distributions and the distribution of chlorides on Mars, together with the high Br concentration measured from the evaporate sediments at two Mars exploration rover landing sites, indicate that the brines in the regions where the chlorides deposited may have reached the stage for potassium salts deposition, thus we propose for the first time that potassium salts deposits might be prevalent in these regions.     

论四川盆地下、中三叠统蒸发岩的生成模式、成盐机理及找钾展望

四川盆地早中三叠统蒸发岩极为发育,时空分布甚广。蒸发岩的生成模式可分为两大类和四个亚类。即Ⅰ,潮间环境的为(1)泻湖盐湖;Ⅱ,潮上环境的为(2)滨海盐湖;(3)近岸盐湖和(4)远岸盐湖。不同生成模式中,其成盐机理虽对成钾皆不够理想,但仍有希望找到钾盐矿的地区和层段。     

罗布泊腾龙台地第四系含钾盐类矿物赋存特征分析

罗布泊腾龙台地第四系盐类矿物中部分地段含钾,局部已达工业品位.本文从含钾盐类矿物的主要赋存层位及分布特征入手,在大量观察钻孔岩心和薄片、样品测试基础上,对第四纪含盐系,尤其是含钾盐类矿物赋存特征和分布进行分析,初步总结了3种成矿模式,从沉积时代学角度分析了今后固体钾盐找矿方向.     

Low flow water chemistry in forested and pasture catchments,Mawheraiti River,Westland

Water samples taken at 19 locations in the Mawheraiti River catchment at weekly intervals during 1979–80 were analysed for sodium, magnesium, potassium, calcium, phosphate, nitrate, and ammonium ion concentrations and for electrical conductivity. Seasonal discharge effects were apparent, and lithology and land management practice also influenced solute concentrations. Solute concentrations were generally very low; nitrate and soluble phosphate were rarely greater than 0.05 mg.L^‐1 and ammonium was rarely greater than 0.01 mg.L^‐1. The 4 major cations (Na, Mg, K, and Ca) usually summed to less than 6 mg.L^‐1 much of which was supplied by precipitation. Forest management (clearfelling and slash‐burning) caused significant increases in solute concentrations, but concentrations declined rapidly during succeeding months and approached pretreatment levels after 2–3 years. The higher concentrations associated with forest management in small experimental catchments were rapidly diluted downstream; together with the low natural solute concentrations this suggests that harmful downstream effects of management practices are unlikely under low flow conditions.     

四苯硼钠—季铵盐容量法快速测钾

用四苯硼钠—季铵盐容量法间接测定钾,并与四苯硼钠重量法进行比较。测定1%以上的钾含量时,相对误差<1%,平均回收率为99.52%,标准偏差分别为0.0082、0.0073,变异系数分别为0.82%、0.33%(RSD,n=7)。该方法操作简便、快速、准确,适用于含钾产品的中间控制分析及钾盐、卤水、盐化工产品、钾肥中钾的快速测定。     

Aeolian dust in a saline playa environment, Nevada, U.S.A.

Saline playas in north-western Nevada, U.S.A., remnants of pluvial periods of the Pleistocene, represent a tremendous source of unconsolidated sediments available for aeolian transport. This study investigated the transport of aqueous-soluble solutes in dust from July 1994 through June 1996 along a transect from a barren salt-encrusted playa surface (elevation=1224 m), to a former pluvial lake beach (elevation=1228 m), to a dune-mantled upland (elevation=1248 m). The content of aqueous-soluble solutes in aeolian dust showed a significant (p≤0·05) interaction with dust trap location (playa, beach, dune) and time of collection. Dust collectors on the playa surface generally contained significantly more aqueous-soluble solutes and had greater total flux of solutes than either the beach or the dune locations. The solute content of aeolian dust was usually higher, in some cases several orders of magnitude, than that in the surface 5 cm of soil. Recent changes in playa hydrology may explain this result. Pulses of nitrate-rich dust, synchronous with spring emergence, and other nutrient additions via aeolian dust may have stimulated invasion of dune-mantled uplands by the weedSalsola paulsenii (barb-wire Russian thistle).     

确山县大金山含钾岩石矿床地质特征及工业利用

确山县大金山含钾岩石矿床位于华北地台南缘东端 ,属沉积—变质型非金属矿床 ,含钾岩层赋存于中元古界汝阳群中 ,初步探明矿石储量 389 6万t。本文阐述了矿床地质特征、生产钾镁肥的工艺试验及开发利用前景 ,为相关厂家生 (转 )产钾镁肥提供了生产依据     

粉煤灰-伊利石/PAA-AM高吸水复合材料的吸液性与释钾性能研究

粉煤灰疏松多孔,具有一定的吸水能力,对土壤有很好的改良作用;伊利石属层状粘土矿物,具有吸水性,含钾较高,可以提高土壤肥效。采用溶液聚合法首次合成了粉煤灰-伊利石/PAA-AM高吸水复合材料,其吸蒸馏水、自来水、生理盐水倍率分别为1695、445、106倍,吸液性能达到和超过了国家"863"项目技术指标和国家农业部的要求。此吸水材料成本低,有利于改良土壤与改善土壤的缺钾状况。同时,还通过谱学分析(原子吸收、X衍射和红外光谱),较深入地研究了该复合材料的释钾机理。