长城系

长城系团山子组火山岩颗粒锆石U－Pb年龄及其地质意义

Grain zircon U-Pb ages for volcanic rocks from TUANSHANZI formation of Changcheng System and Their Geological Implications

论长城系微化石群的真核生物意义

Significance of eucaryotic organisms in the microfossil flora of Changcheng System

平泉地区长城系岩相及沉积环境分析

Analysis of Lithofacies and Sedimentary Environment of Chang Cheng Group in Pingquan Area

华北蓟县元古界长城系串岭沟组岩石的古地磁再研究

Restudy of paleomagnetism of rocks from Chuanlinggou formation of Proterozoic Changcheng System in Jixian county , north China

京津地区长城系下伏变质岩系变质年龄及长城系底界年龄的厘定

The metamorphic age of pre-changcheng system in Beijing-Tianjin area and a discussion about the lower limit age of Changcheng System

利用砂岩中波痕的特征估算沉积环境的物理参数&以宣化地区长城系下部石英砂岩为例

Estimates of Physical Parameters in Sedimentary Environments by Means of Ancient Ripple Marks & Case of Changchengian quartz sandstones in Xuanhua Area , Northwest Hebei

八家子铅锌矿床产于中元古界长城系高于庄组含锰白云岩中，矿床明显受地层控制。

Lead-zinc deposits of Bajiazi yield in dolomite with manganese in Gaoyu-zhuang Formation of Changcheng System in Proterozoic Group , and obviously are controlled by stratum .

碳酸盐岩地球化学特征与沉积环境判别意义&以冀北坳陷长城系高于庄组为例

Geochemical characters of carbonates and indicative significance of sedimentary environment & an example from the Gaoyuzhuang Formation of the Changcheng System in the northern Hebei Depression

辽西&冀东地区赋存于长城系上部和蓟县系下部碳酸盐岩中的层控金矿床为该区的一种具有良好找矿前景的新类型金矿床。

The gold deposits hosted by Middle Proterozoic carbonate rocks at Western Liaoning and Eastern Hebei are new type of strata bound gold deposits , they have great resources potentialities .

长城系（1800&1400Ma）不仅是后生植物出现和繁盛的重要阶段也可能是后生动物出现和发展的关键时期。

The Changcheng system ( 1800 & 1400 Ma ) is not only the appearance and flourishing stage of metaphyte but also a key stage for appearance and developing stage for metazoa .

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This back door assemble applies to Great wall hover auto parts , cheap and quality , welcome to order .