火山岩

The upper intercept age indicats a low limit of crystal age of the zircons and suggests a basaltic volcanic event at 1.8 Ga ago in this area.

其上交点年龄指示了该锆石的最小结晶时代，它表明在18亿年时该地区曾有一次玄武质火山岩事件。

Tectonic analysis of Pre-Carboniferous metamorphic stratum and structural foliation dating have shown that The Qinling and its vicinities had happened an important regional tectonic event -Caledonian event, this event represents early paleozoic closure of the Qinling ocean basin and continent-continent obliquely diachronous collision, so we also could reconstruct Caledonian Qinling orogenic belt's basic tectonic framework.

对北秦岭地区前石炭纪变沉积—火山岩地层系统进行构造解析，以及构造面理定年数据表明，秦岭及邻区志留纪至早泥盆世经历了区域性的重大构造事件，相当于加里东事件，该事件代表了秦岭早古生代洋盆闭合、陆—陆碰撞造山的造山事件，并可恢复加里东古造山带的基本构造格局。

Mechanisms and significance of microfracture s generated by microwave heating in sandstone reservoirs;2. There are many kinds of microfracture s which play an impor- tant part in connection of the pores in a reservoir and denudation of vugs,and enhancing reservoir permeability.

Y气田Z组火山岩储层孔隙结构复杂，基质孔隙间连通程度差，属于典型的低孔低渗储层；微裂缝种类多，在连通储层气孔和溶蚀孔洞、增强储层渗透性方面起着非常重要的作用，但识别和评价相当困难。

The SiO〓 and K〓O contents of volcanic rock increase with time, and the series of volcanic rock develops from the transition between alkaline series and calc-alkaline series to calc-alkaline series.

随时代变新，火山岩的SiO〓和K〓O含量增加，TiO〓含量适中，变化不大；岩石系列由碱性与钙碱性过渡的系列向钙碱性系列演化。

ReHeTai oil field has many oil-bearing strata,among them the volcanics is one of the important reservoir.

热河台油田具有多套含油层系，其中火山岩也是热河台油田的重要储层之一。

The Shidu Scenic district is good at karst-ravine landscape, The ShihuadongScenic district is characterized of subsurface cave sight seeings, The Baihuashan-Baicaopan is famous at its volcanic-rock intermediate mountain and grass land landscapes, The Yesanpo Scenic district is a structural-scouring ravine landscape region and The Baishishan Scenic district is good at its marble peak forest landscapes.

十渡园区为岩溶峡谷地貌景观、石花洞园区为溶洞群地下岩溶景观、百花山——白草畔园区为火山岩中山草甸地貌景观、野三坡园区为构造——冲蚀嶂谷地貌景观，白石山园区为大理岩峰丛地貌景观。

The study on petrology, geochemistry and isotope geology indicates that there are the common resource and tectonic setting for the Kangbutiebao formation with metamorphic volcanic rocks and the granite plutons related to the main iron deposits.They are different facies from magma evolvement in late Silurian-early Devonian.

岩石学、岩石地球化学及同位素研究表明，康布铁堡组变质火山岩、与主要铁矿床有关的花岗岩具有同源、同构造环境特征，是晚志留世-早泥盆世岩浆演化的不同相。

The main deposit type will be volcanic secondary volcanic gold deposit and porphyry copper/molybdenum deposit.

主攻矿床类型为火山—次火山岩型金矿和斑岩型铜钼矿。

The Permian volcanic rocks from Jianshui area tectonically intruded into southwest part of Shizong-Mile fault belt. It is mainly comprised of basalts, basaltic andesites, andesites and a little picrites.

滇东南建水地区二叠纪火山岩构造侵位于师宗－弥勒断裂带的西南段，以玄武岩、玄武安山岩和安山岩为主，夹有少量苦橄岩。

The perlites are volcanic rock processed to yield an expanded form.

珍珠岩是处理过的膨胀火山岩。

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。