cherts相关论文
Iron speciation in cherts from the Laobao Formation, South China: Implications for anoxic and ferrug
Cherts in the Laobao Formation in the Silikou section,South China were deposited in terminal Ediacaran deep-water.The sp......
Geochemistry of the Late Paleozoic radiolarian cherts within the NE Jiangxi ophiolite melange and it
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......
Geochemistry of the Late Paleozoic radiolarian cherts within the NE Jiangxi ophiolite melange and it
Major and trace elements are presented for the late Paleozoic radiolarian cherts, which were spatially associated with t......
新疆玛依勒早古生代硅质岩一般产于蛇绿混杂岩带中,为探讨其成因类型和沉积环境,对其进行了岩相学和地球化学研究。硅质岩主要为紫红......
塔里木盆地寒武系发育层状硅质岩和硅化岩,层状硅质岩主要发育于塔东下寒武统深水沉积相区;硅化岩发育于塔东上寒武统斜坡沉积区与西......
本文首次描述了采自黑龙江那达哈达岭硅质岩中的三叠纪牙形刺Neospathodus cf.dienery,N.kockeli,Neogondolella mombergensis,Carinella mungoensis,Metapolygnathus cf.parvus,从而确定了硅质岩的地质时代。......
硅质岩由于受后期风化作用及成岩作用影响较弱,其地球化学特征常被用来讨论硅质岩成因和形成构造背景。本文分析了硅质岩的成因以......
湘中南地区奥陶系由“细碎屑岩-硅质岩系-粗碎屑岩”构成,三者厚度变化具有明显的规律性:厚度等值线的展布逐渐趋于北东方向,厚度最......
对塔里木盆地北部及塔东1井下寒武统黑色岩系中硅质岩的微量元素和稀土元素分析的结果,硅质岩中As、Sb、Hg、Ba、Sr、V、Ni、Mo、U......
北祁连造山带位于华北板块西南缘,是中一南祁连微板块与华北板块碰撞形成的加里东造山带。永登石灰沟位于北祁连东段,跨奥陶纪岛弧构......
尖山混杂岩带由基性一超基性岩、基性火山岩、基性火山碎屑岩及硅质岩组成,各类岩石呈岩片(块)产出。带内硅质岩具富Al_2O_3、高Fe_2......
对北大巴山地区下寒武统黑色岩系中毒重石矿床的顶、底板硅质岩及顶板上覆地层中的硅质岩进行了较为系统的主元素、微量元素和部分......
在淮北新元古代倪园组和九顶山组海相碳酸盐岩地层中,保存着许多燧石相微生物化石.通过对其形态结构、群落组合特征及埋藏保存状态......
从岩石学、矿物学、地球化学等叫结秦岭凤太地区泥盆纪硅质白云岩-硅质岩的地质地球化学特征。硅质岩类中,SiO2〉80%,(FeO+Fe2O3+MgO)〈10%;硅质铁白云岩类中,SiO2为30%~50%,(FeO+FeO3+MgO)大......
南天山库米什铜花山地区蛇绿混杂岩带不同岩块中的硅质岩高Al2O3和Al2O3/TiO2,Zr、Nb、Hf、Ta和Th与Al2O3等陆源元素具较好正相关性,......
北祁连老虎山地区玄武岩与沉积岩呈互层产出,玄武岩主要为E-MORB,少数为N-MORB;多数样品具Nb负异常,表明很可能形成于弧后盆地环境......
Comparative geochemical study of the cherty rocks of the Taukha terrane(Sikhote-Alin)and its paleoge
The article presents the results of a comparative geochemical study of cherts and siliceous-clayey rocks composing the t......
The Origin of Bedded Cherts of the Early Permian Gufeng Formation in the Lower Yangtze Area, Eastern
Bedded cherts occurring in the Early Permian Gufeng Formation in the Lower Yangtze region, eastern China, are nearly 20-......
对桂西南上二叠统大隆组层状硅质岩地球化学的研究发现:陆源主量元素Al、Ti等含量较高,并呈很好的相关性(R〉0.90);热液来源的主量元素Mn......