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热水体系
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     A STUDY ON THE FOSSIL HYDROTHERMAL CONVECTION SYSTEM IN THE QINDAO COMPLEX BATHOLITH OF GRANITOIDS
     青岛花岗岩类复式岩基的古化石热水体系研究
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     248 from both.
     248体系
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     World-system
     世界体系
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     A STUDY ON THE FOSSIL HYDROTHERMAL CONVECTION SYSTEM IN THE QINDAO COMPLEX BATHOLITH OF GRANITOIDS
     青岛花岗岩类复式岩基的古化石热水体系研究
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     Establishment and application of quantitative appraisal system for geothermal resources in sedimentary basin
     沉积盆地型地热水资源定量评价体系的建立及应用
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     GEOTHERMAL WATER OF XINJIANG
     新疆地下热水
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  thermal water system
One of the main objectives of this study was the identification of possible mixture between Minho river waters with the thermal water system.
      


Mammiform structure ( MS ) is a newly-discovered sedimentary structure in chert, stratiform barite and carbonate manganese ores in China. The most typical example is found in Mugui area in the 250m thick Upper Devonian cherts with intercalations of basic to acid subvolcanic rocks and red and green jasper and manganese ores.MS can be seen in the thin laminated chert layer near the bottom of the acid subvolcanic rocks.The relationship between chert stratification and the morphology of MS indicates a meta-synsedimentary...

Mammiform structure ( MS ) is a newly-discovered sedimentary structure in chert, stratiform barite and carbonate manganese ores in China. The most typical example is found in Mugui area in the 250m thick Upper Devonian cherts with intercalations of basic to acid subvolcanic rocks and red and green jasper and manganese ores.MS can be seen in the thin laminated chert layer near the bottom of the acid subvolcanic rocks.The relationship between chert stratification and the morphology of MS indicates a meta-synsedimentary origin before the chert was consolidated. Most MS looks like a upside-down mamma with a diameter of several centimeters and a hight to width ratio of 1-2 . It has a convex rounded top surface which intercepts with the bottom at an angle of about 60° -90° .A little hole about several millimeters in diameter can be seen near the bottom. Different zones can be recognized in the cross section from its rim inwards:

产于泥质硅岩层中顺层分布的燧石结核,外形似乳头向下的乳房。结核下顶端有残余小孔,内部有与外形和残余小孔相对应的分带性。外带为不完全交代带,常残留被交代围岩的残余;内带是球粒化的完全交代带。有时还出现结晶充填为特征的核部带。地质和岩石学证据显示乳房状构造是沉积物尚未固结时,由富含硅质的热水溶液的交代作用、结晶充填作用所形成,可作为热水体系在盆地底面附近作用的标志,亦可作为示序构造。类似构造也见于锰矿、重晶石矿和盆地灰岩中。

The oxygen isotopic characteristics of the Qindao granitoid batholith indicate that most of the plutons were evidently affected by the interaction between meteoric water and rocks to different extents. There are six fossil hydrothermal convection systems, which occurred at the time of their formation. According to the distributions of the δ18O values of the rocks in the batholith, two types can be distinguished on the basis of the δ18O contours in each of plutons, one is lower in δ18O in the inner part but higher...

The oxygen isotopic characteristics of the Qindao granitoid batholith indicate that most of the plutons were evidently affected by the interaction between meteoric water and rocks to different extents. There are six fossil hydrothermal convection systems, which occurred at the time of their formation. According to the distributions of the δ18O values of the rocks in the batholith, two types can be distinguished on the basis of the δ18O contours in each of plutons, one is lower in δ18O in the inner part but higher in the outer part and the other is higher in the inner part but lower in the outer part. They may be related to the circulating patterns of meteoric waters. The results of modelling calculation for the water-rock interaction systems indicate that the temperatures of these systems range from 250℃ to 400℃, and their W/R ratios vary from 0.08% to 0.3%. Meanwhile, it has been found that degassed plutons are different from non-degassed plutons tor weakly degassed plutons) with respect to their hydrogen and oxygen isotopic compositions.Therefore, δ18O-δD diagrams can be uscd as effective measures to distinguish degassed plutons from non-degassed ones.

对青岛花岗岩类复式岩基的氧同位素研究表明,各个岩体的氧同位素组成明显受水岩相互作用的影响。根据样品采集位置和氧同位素分析结果,可以恢复其中六个古化石热水体系,它们包括两种类型:内高外低型和内低外高型,其形成可能与当时大气降水的循环方式密切相关。近似模拟计算表明,发生水岩作用的温度多在250-400℃之间,水岩比的变化较大(0.08%-0.3%)。研究还发现,曾发生过强烈去气作用的岩体与未经去气(或去气较弱)的岩体相比,其氢氧同位素体系受水岩作用影响结果不一样,使用δ18O-δD图可以对它们进行有效的鉴别。

Songtao manganese deposits in Guizhou

松桃锰矿矿石氯仿沥青“A”、饱和烃和芳烃含量高,非烃含量低,围岩泥岩则与此相反。正构烷烃、类异戊二烯烷烃、甾烷和萜烷等生物标志物的特征表明,贵州震旦松桃锰矿热水沉积体系中微生物主要为藻类生物和细菌类微生物,其生存环境为水温达170℃~195℃、还原和盐度不高的热水体系

 
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