火成岩

The petrogenesis of intrusive rocks is discussed in this paper according to the equilibrium of minerals. It is suggests that in the Shigujian pluton, the designations of plagioclases are 15 - 25, the plagioclases are all oligoclase; the biotites are Mg-biotites, and most of the amphiboles are edenitic amphiboles or edenite; paragenetic ...

结果表明：（1）石鼓尖侵入岩中，斜长石成分较稳定，共生角门石和黑云母为岩浆平衡结晶的矿物；（2）天堂寨和九资河侵入岩中，部分斜长石和黑云母可能为熔蚀残留矿物，角闪石属于火成岩区的新生矿物，可能为斜长石和黑云母发生熔融反应所形成；（3）三个侵入体的岩石均为岩浆成因。

Extrusive igneous rock solidified near or on the surface of the Earth.

在地球表面或附近凝固的火成岩。

Contrast the formation of intrusive and extrusive igneous rocks.

对比形成的侵扰和挤压火成岩。

Obsidian is an igneous rock that looks like a broken filly of black glass.

黑曜石是火成岩像断母黑色玻璃。

The Panzhihua intrusion, a part of the Emeishan large igneous province, is one of typical V—Ti magnetite ore-bearing layered gabbro intrusions.

攀枝花岩体是攀西地区一个典型含钒钛磁铁矿的层状辉长质岩体，是峨眉山大火成岩省的组成部分。

When silica content reaches 45-53 %, basic rocks become the name of this type of igneous rock in which the gabbro is the typical intrusive rock which are composed of pyroxene and calcium plagioclase, whereas basalt is the equivalent extrusive rock.

当岩石中SiO2含量在45～53%之间时，称这类火成岩为基性岩。辉长岩就是这类岩石侵入岩的典型代表，其中矿物成分为辉石，钙长石，而基性的喷出岩则称之为玄武岩。

Gneiss is a typical metamorphic rock type, in which a sedimentary or igneous rock has been deeply buried and subjected to high temperatures and pressures.

片麻岩是一个典型的变质岩石类型，其中含有的火成岩或沉积岩受到深埋与高温和压力。

The age of igneous rock obtained from the central graben is younger than 1 Ma.

中央张裂地堑内的火成岩年龄不大于1Ma。

Rhyolites are a group of extrusive igneous rocks with phenocrysts (visible crystals that grew out of the molten lava) of quartz and alkali feldspar in a glassy to cryptocrystalline groundmass.

流纹岩是一组受挤压火成岩矿，包含了在玻璃基的隐晶质中的石英与碱性长石的斑晶（生在于熔岩外的可见石英晶体）。

The heavy mudstone layers in Third Member of Shahejie Formation (Es3) provide favorable hydrocarbon source rock and cap formation, diabase and hornfels belts serve as reservoirs, faults and microcracks in the wall rocks as the pathways for oil and gas migration.

沙三段厚层生油岩为火成岩储层提供了良好的烃源岩和封盖层；辉绿岩及角岩带为主要的储层带；断层及围岩中的微裂缝为油气运移提供运移通道。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。