中性岩

可划分出南北2个火山岩带，南带以中性岩为主，北带粗面质火山岩增多。

The south and north belts may be distinguished : the south belt is dominated by intermediate rocks , while trachytic pyroclastic rocks increase in the north belt .

双峰式火山岩具有与含中性岩的火山岩组合相类似的主量元素特征，但两者的微量元素特征相差较大。

Intermediate-bearing volcanic rock assemblage and bimodal volcanic rock assemblage have similar characteristics of major elements and different characteristics of trace elements .

山门银矿区出露的中生代侵入岩是一套由基性岩、中性岩、酸性岩组成的复式侵入体。具有规模大、侵入期次多、演化时间长的特点。

The outcropped Mesozoic intrusive rock is a composite intrusion which consists of basic , intermediate and acid rocks , characterized by the large scale , multiphase intrusion , and with long evolution .

浙东早白垩世含中性岩的火山岩组合和双峰式火山岩组合的主量元素和微量元素特征对比研究表明，中性火山岩的地球化学特征明显受到伴生的基性和酸性火山岩的影响。

The comparison studies of major elements and trace elements of early Cretaceous intermediate-bearing volcanic rock assemblage and bimodal volcanic rock assemblage in eastern Zhejiang suggest that the geochemical characteristics of intermediate volcanic rocks are obviously controlled by those of coexisted basalts and rhyolites .

对二连盆地北部地区中、新生代典型火山岩地球化学研究表明，该区中、新生代强烈的岩浆活动以酸性、中性火山岩为主。

The study of the geochemistry for typical Meso Cenozoic volcanic rocks from northern Erlian basin shows that the main magmas are acidic to neutral .

甘肃南祁连褶皱带党河南山地区中奥陶世火山岩的岩石学和微量元素、稀土元素的地球化学等研究证明，本区火山岩由基性火山岩和中性火山岩组成。

It is suggested basic lava and intermediate lava constitute the volcanic rocks by the testing of rare earth elements and trace elements in southern Danghe Mt.

结果表明：（1）在油湿和中性润湿岩心中，孔隙半径越小，存在剩余油的概率越大。

The result indicates that : ( 1 ) In the oil-wet and intermediately wet cores , the smaller the pore radius is , the larger the probability of the existence of remaining oil is .

赤峰北部早二叠世末至晚二叠世初基性&中性次火山岩锆石UPb和谐线年龄为（276.3±4.2）Ma，岩石组合为玄武岩、玄武安山岩及安山岩等。

The basic intermediate subvolcanic rocks from northern Chifeng generated at the end of early Permian epoch to the beginning of late Permian epoch yield U Pb concordant ages of 275.3 ± 4.2 Ma .

物源分析表明，无序间层粘土岩主要由中性火山碎屑（岩）在原地蚀变、转化而成，而有序间层粘土岩则是由酸性岩蚀变而成。

The results show that the disordered and ordered clay rocks are respectively formed by intermediate and acidic pyroclasts in the sedimentary basins .

铁质、镍质矿床在基性岩中形成，铜主要与中性&中酸性岩有关。

Iron deposit and nickel deposit formed in basite and ultrabasite rocks , copper deposits in this belt are related to neutral - medium acidic rocks .

主量和微量元素分析表明，研究区中生界中性和酸性火成岩形成于挤压背景下的岛弧环境，中生界和新生界基性火成岩形成于拉张背景下的初始裂谷环境。

The major and trace elements analysis showed that the Mesozoic intermediate and acid rocks in the study area were formed in the compressional island arc environment , the Mesozoic and Cenozoic basic igneous rocks formed in an extensional initial rift .