火山岩

It not only ends the dispution about the time of the Mt. Yandangshan World Geopark volcanic rocks, but also ofifers chronologic limits for both stratigraphic divisions of Cretaceous volcanic rocks in eastern Zhejiang and the Yanshanian Movement in Southeast China.

这不仅解决了有关雁荡山世界地质公园火山岩形成时代的争议，也为解决浙江东部白垩纪火山岩地层划分对比提供了良好的年龄约束，同时也为探索中国东南部燕山运动提供了年龄约束。

Chronologic researches on the Mesozoic (230-65Ma) volcanic rocks in West Liaoning and adjacent areas indicate that the volcanic activities were periodic with an average period of 20-30Ma, and that the peak ages of the volcanic activities were determined at 230Ma, 190Ma, 160Ma, 130-120 Ma, 110-100 Ma, and 80Ma, respectively.

对辽西及其邻区中生代(230~65Ma)火山岩年代学的研究发现：火山活动具有平均间隔20~30Ma的周期性，火山岩活动的峰期为230Ma、190Ma、160Ma、130~120Ma、110~100Ma、80Ma。

Most of the Xiangshan volcanic rocks are peraluminous-metaluminous (ASI=1.02～1.16), while subvolcanic rocks are mostly metaluminous (ASI=0.90～1.02), and dioritic enclaves are undersaturation of aluminum.

相山火山岩系的ASI值为1.02～1.16，为准铝—过铝质，次火山岩的ASI值为0.90～1.02，多为准铝质，而闪长质包体的ASI值为0.59～0.71，属铝不饱和类型。

The method we used in porosity and fractural parameters calculation has coincide well with practice.

系统分析研究区及其邻区火山岩测井响应特征，首次提出了基于交会图和多元统计方法的神经网络岩性识别技术，在解决复杂岩性地层的岩性识别中取得了很好的效果，提高了井孔岩性剖面解释精度，岩性解释符合率大于80％；运用多种参数评价火山岩裂缝—孔隙性储层，提出的计算孔隙度和裂缝参数的方法在实际应用中取得较好的效果。

The granitic enclaves in the central-facies porphyroblastic lava are subvolcanic rocks with forming age of 134.2±1.9Ma. There is another intrusion of subvolcanic rhyodacitic porphyry with age of 136.0±2.6Ma, in the contact zone of the two volcanic cycles in the western part of the Xiangshan complex. The U-Pb ages of the sub-quartz-monzonite porphyry and lamprophyre are 129.5±2.0Ma and 125.1±3.1Ma, respectively. This suggests that the extension in the Xiangshan region, began in K〓, was week, and earlier than that in the coastal region of Zhejiang and Fujian provinces. Extension in K〓 in Xiangshan and neighboring regions was much stronger, forming NE striking large red-downfaulted-basins.

相山中心相碎斑熔岩中的花岗质包体属次火山岩，其成岩年龄为134.2±1.9Ma，在相山西部两火山旋回的界面之间，存在另一类次火山岩的侵位，其成岩年龄为136.0±2.6Ma，岩性为次流纹英安斑岩；次石英二长斑岩及煌斑岩的成岩年龄分别为129.5±2.0Ma及125.1±3.1Ma，说明相山地区的伸展、裂解作用明显早于浙、闽沿海，在K〓就开始了，但规模并不是很大；而K〓时期的拉张作用在相山及其邻区表现的更为强烈，形成了大面积的呈北东向展布的红色断陷盆地。

Petrological and petrochemical characteristics show that there exist such volcanic and subvolcanic rock types as basalt, iddingsite olivine basalt, olivine basaltic trachyandesite, trachybasalt, latite, trachydacite, trachyte, rhyolite, tuff and granite-porphyry in northeast Jiangxi Province. The volcanic rocks can be subdivided into high K calc-alkaline series, shoshonite series and alkaline basalt series.

岩石学及岩石化学特征表明，赣东北地区早白垩世火山岩及次火山岩主要有：玄武岩、伊丁石化橄榄玄武岩、橄榄玄武粗安岩、粗面玄武岩、安粗岩、粗面英安岩、粗面岩、流纹岩、凝灰岩及花岗斑岩等，可划分为高钾钙碱性、橄榄安粗岩和碱性玄武岩3个系列。

L. Volcanic rocks in the Ashele mine are characterized by interbedded basic and acidic pyroclastic rocks, and made up typical bimodat pattern according to 〓 features and Lithochemistry

从地质特征和岩石化学两方面论证了矿区火山岩以基、酸性碎屑岩互层为主要特点，并构成典型的双峰式火山岩组合

Based on it,this paper introduces the evaluation research and applications from lithological discrimination ,reservoir identification and reservoir parameter determination.

在此基础上，本文从火山岩岩性识别、储层识别、储层参数确定等方面开展了测井评价研究与应用，总结出适合地区特点、可操作性强的火山岩储层测井评价方法，效果显著。

The Dahalajunshan Formation dominated lithologically by calc-alkaline volcanic rocks constitutes a complete island arc volcanic sequence; whereas the Aikendaban Formation with dominance of alkaline-subalkaline volcanic rocks belongs to shoshonitic sequence formed in the extension of collision-orogeny.

大哈拉军山组火山岩以钙碱性系列为主，构成了一个完整的岛弧演化序列；艾肯达坂组火山岩以偏碱性-碱性系列为主，属于典型的碰撞造山伸展期的橄榄安粗岩系。

The seismic reflectance signatures of the Carboniferous volcanic rocks in the study area are divided into four types, including lobate/wedge reflection, tabular reflection, arc reflection, and mound/mushroom reflection. Based on previous studies and detailed well-seismic correlation, the lithofacies of volcanic rocks corresponding to different seismic reflectance signatures are recognized.

将该区石炭系火山岩体的地震反射特征划分为以下4种：舌状或楔状反射、板状反射、弧状反射、丘状或蘑菇状地震相反射特征；结合前人的研究成果和详细的井震对比，确定了不同的地震反射特征所对应的火山岩岩相。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。