斑晶变晶

The growth of the porphyroblasts of andalusite and cordierite is of similar process.

红柱石、堇青石变斑晶中也有类似的生长过程。

Pyroxene grains in gabbroic anorthosite,troctolite,microporphyritic crystalline impact melt breccia,and Ti-bearing clasts are mainly low-Ca pigeoniteEn_(63Fs_(32)Wo_5,En_(66)Fs_(23)Wo_(11),En_(55)Fs_(38)Wo_7,and En_(57)Fs_(35) Wo_8,respectively,and those in anorthositie gabbro,gabbro,and the matrix display a wide range of compositionEn_(31～33Fs_(35～48) Wo_(19～34),En_(18～48)Fs_(23～51)Wo_(24～38)+En_(1～9)Fs_(65～86)Wo_(14～26),En_(11～53)Fs_(23～63)Wo_(6～36),respectively,mainly occurring as pigeonite,augite, and trace amounts of pyroxferroite.

辉长质斜长岩、橄长岩、微斑熔融角砾岩等岩屑和含钛玻屑中的辉石相对贫钙，主要为易变辉石(分别为En63 FS32 WO5，En66FS23WO11，En55FS38Wo7和En57FS35WO8)，而斜长岩质辉长岩和辉长岩岩屑中的辉石和晶屑辉石的成分变化比较大(分别为En31～33 FS35～48 WO19～34，En18～48 FS23～51 WO24～38+En1～9 FS65～86 WO14～26和En11～53 FS23～63WO6～36)，为易变辉石和普通辉石，以及少量三斜铁辉石。

A —Sample ZM641 , garnet porphyroblast with inclusionsof amphibole , epidote , plagioclase concentrated in the core of crystal , the rimof the garnet

a —样品ZM641 ，角闪石、绿帘石和斜长石包体分布在石榴石变斑晶核部，边部有绿辉石包体，基质矿物主要为绿辉石背散射电子图像

Conventional step heating 40 Ar 39 Ar spectra of metamorphic garnet separated from a high pressure granulite sample yielded date of 1852±8Ma.

采用 4 0 Ar- 39Ar阶段加热法研究华北桑干地区高压基性麻粒岩的变斑晶石榴石，获得 4 0 Ar- 39Ar坪年龄 185 2± 8Ma，4 0 Ar- 39Ar等时线年龄 186 2± 37Ma。

The mineralization and the alteration types are clearly distributed around the hornblende quartz diorite porphyry intrusion.

其矿化围绕含眼球状石英斑晶的角闪石石英闪长玢岩及其环带状蚀变带分布。

According to logging results of 167 boreholes and chemical analyses of 24 369 samples as well as characteristics of element distribution at 4000 m, 3950 m and 3900 m levels, the deposit is characterized by alteration, mineralization and element geochemistry of the porphyry. Alteration and mineralization are spatially and temporally related to the augen quartz phenocryst-bearing hornblende-quartz diorite porphyrite (J3δομ).

根据167个勘探钻孔编录和化学分析（24369件化学分析样品）资料，以及对海拔4000m、3950m、3900m水平面的Cu、Au、Ag、Mo、Mn、Pb、Zn、W、K、Na、Ca、Rb元素分布规律的分析，显示矿体具有斑岩型矿床的蚀变、矿化以及元素地球化学特征，主要矿化和围岩蚀变在时间上和空间上均与含眼球状石英斑晶的角闪石英闪长玢岩(J3δομ)有关。

So, on the basis of systemically study of summarizing the history of geothermometer, geobarometer, P-T paths, relationship between the metamorphic and deformation and the geochemistry of paracelsian, the author studied the character of mineralogy, petrology and geochemistry and discussed the basic geological problem, relationship between metamorphism and deformation.

鉴于此，在系统总结了PTt轨迹的研究历史及现状、地质温压计的进展、变质与变形作用和副变质岩石的地球化学研究的基础上，通过详细的矿物学、岩石学及地球化学的系统研究，就宝音图群的地质、地球化学特征、变斑晶生长相与变形的关系和变质作用演化进行了探讨。

Consequently, they continued to grow and connected with each other to form the skeletal crystal for the porphyroblast.

本区石榴石、十字石等变斑晶的生长过程有多种形式，多数单晶不是一开始就环绕一个晶核不断增长，而是以多结晶中心聚集生长为特征。

Partially replaced by very fine symplectites of Amp + Pl ; e —Sample ZM651 , garnet porphyroblast with large amounts of inclusions

射电子图像； d —样品ZM641 ，绿辉石边部具有细粒的角闪石+斜长石后成合晶； e —样品ZM651 ，石榴石变斑晶核部

The six data in the age spectra defined an 40 Ar 39 Ar isochron which gives an age of 1862±37Ma.

这一结果表明，虽然变斑晶石榴石中仅仅在显微矿物包体、流体包裹体和晶格缺陷中赋存少量的 K+，但其生成的 4 0 Ar*仍然能够形成稳定的年龄谱。

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。