结晶花岗岩

The presence of REE tetrad effects in apatites and whole rocks of S-type granites has been reported by Sha and Chappell (1999) and Zhao et al.(1999), respectively. The REE tetrad effect in minerals, such as apatite, spessartite, beryl, alkali feldspar and spodumene, from all zones of Altay No. 3 pegmatite has been found remarkable, and the fractionations among isovalent incompatible elements in these minerals are also significant. This paper puts forward that the REE tetrad effect is one of the basic features of peraluminous melts and the origin of REE tetrad effect might be probably related to some processes prior to the formation of pegmatite magma. The immiscibile liquid separation between silicate melt and hydrosaline melt may be responsible for it.

由于阿尔泰3号伟晶岩脉各带磷灰石以及与其共生的石榴石、绿柱石、碱性长石、锂辉石矿物均存在明显的稀土"四重效应"以及相同电价、相似离子半径的不相容元素间存在显著的分异，并结合最近赵振华等(1999)和Sha and Chappell(1999)报道S型花岗岩全岩和单矿物(磷灰石、独居石、长石、黄玉等)均存在稀土"四重效应"这一现象，本文研究提出，稀土"四重效应"是富挥发分过铝质岩浆体系的一个基本特征，其机制既不可能由含稀土的副矿物早期结晶引起残余熔体相中REE含量变化的结果，也不能定性地归因于流体相与熔体相相互作用过程中稀土元素在流体/熔体之间分异的结果，而很可能与伟晶岩岩浆形成之前某些过程密切相关，S型花岗岩岩浆在液相线以上存在硅酸盐熔体与高盐熔体的不混溶液相分离有可能是过铝质岩浆体系产生稀土"四重效应"的主要原因。

We think that feature of granitic geomorphologic landscape of Mt. Chaya, which had been formed by syenogranite with medium—coarse grains,mineral crystallized more coarse and equal,joint and fissure of productional are even spacing,unique geomorphologic place and the special climate condition is from north subtropical zone to warm temperate zone, are evidence that granitic geomorphologic is marked zone.

认为嵖岈山花岗岩地貌景观的特征是因嵖岈山花岗岩为中粗粒正长花岗岩，矿物颗粒结晶比较粗且岩性较均一、岩体内节理裂隙发育程度疏密适中、独特的地貌部位和北亚热带向暖温带过渡地带的气候条件形成的，是花岗岩地貌显著地带性有力见证。

It also occurs, together with Corundum, Tourmaline, Topaz and other minerals in some pegmatites.

同时，她还与刚玉、电气石、黄玉等其它矿物质衍生在结晶花岗岩层中。

The Dabie Mountains are unique among ultrahigh pressure metamorphic terranes in having the most profound post collisional plutonism The Mesozoic shoshonitic and calc alkaline intrusive rocks can be divided into three groups with different isotopic ages, rock assemblages and chemical features Group I consists of late Triassic (~ 210 Ma) mafic monzodiorites It could have been generated by partial melting of enriched subcontinental lithosphere mantle due to slab breakoff Group II consists ma...

第 I组，主要由晚三叠世（约210 Ma）二长闪长岩辉长岩体组成，它可能是在板片断离过程中富集的大陆岩石圈地幔部分熔融的产物；第I I组，由中侏罗世－早白垩世（160～120 Ma）的角闪石英二长岩、黑云母二长花岗岩和正长花岗岩组成，主要是由幔源岩浆的分离结晶与地壳混染共同作用的产物；第II I组，以白垩纪（125～95 Ma）的花岗岩和花岗斑岩为代表，是在热穹窿作用过程中大别杂岩深熔作用和高度演化的产物。

The feldspars of topaz-lepidolite granite in Yashan late stage are P-rich albite and Kfeldspar, and the phosphorus goes into feldspar structure in the form of PAlSi〓 substitution. The phosphorus contents of feldspars vary according to their crystal habitus. In general, the feldspars of later generation have the higher average phosphorus content than that of earlier generation, and the albite contains higher phosphorus than the K-feldspar in the same generation. The zircon is highly rich in Hf, U, P and Al. The phosphorus enters the zircon structure mainly by the form of〓P〓〓Si〓, Al〓P〓Si〓 or P〓Al〓Si〓, Zr〓 substitution. The P-rich zircon is the production of the highly evolved magma, and it might be one of the important characteristic minerals of the high-P subtype granite. The manganocolumbite, manganotantalite, wodginite and titanowodginite are the main niobium and tantalum minerals.

雅山晚阶段黄玉锂云母花岗岩的长石矿物是富磷长石，磷以PAlSi〓替换方式进入长石结构中，并且在长石中的分布很不均一，一般是晚结晶的长石比早结晶的长石的磷含量高，同期结晶的钠长石比钾长石的磷含量高；锆石矿物为高度富铪、铀、磷和铝的锆石，磷主要以(Y， HREE， Fe)〓P〓〓〓Si〓〓、Al〓P〓Si〓〓、P〓Al〓Si〓〓Zr〓〓等替换方式进入锆石晶格中，富磷锆石是岩浆高度演化的结果，是高磷花岗岩的特征矿物之一；雅山含有丰富的磷锂铝石，是高磷花岗岩的主要磷酸盐矿物；铌—钽矿物主要有铌锰矿—钽锰矿、锡锰钽矿—钛锰钽矿、细晶石等。

The magmatite in the area consist mainly of granite, monzonitic granite, syenogranite and acid volcanics.

研究区出露的岩浆岩主要为花岗岩、二长花岗岩、正长花岗岩和酸性火山岩，岩石化学成分上以富铝钾、贫镁铁，且经历了较大的分离结晶作用为特征。

The experimental products include crystal phase quartz, feldspar (alkila-feldspar, albite, K-feldspar), zinnwaldite and topaz, a melt phase and a trace vapour. The solid products were been studied by optics method, electron microprobe and X-ray analysis. The results show that liquidus temperature raises slightly and solidus temperature falls down obviously and that the upper temperature limit raises for the stability field of quartz and topaz, and falls down for the stability field of alkila-feldspar as F contents in crease.

实验淬火产物包括结晶相石英，长石(碱性长石，钠长石、钾长石)，铁锂云母和黄玉及玻璃相和微量流体，对固相淬火产物进行了系统和详细的显微观察及电子探针和x射线分析，研究了F对钠长花岗岩液、固相线温度、相关系和相组合的影响和含F钠长花岗岩的结晶序列和熔体演化、F在流体和熔体之间的分配及F对花岗质熔体结构的影响，对含黄玉矿物组合进行了一系列热力学矿物平衡计算，获得如下重要结论

Geochemical characteristics indicate S-type granites and volcanic rocks depleted in sodium and enriched in potassium, with 62.42%～78.02% w(SiO2), 7.66%～9.13% w(K2O+Na2O), 1.18～2.62 w(K2O)/w(Na2O), and Rittmann index δ of 1.67～3.78. They are enriched in LREE with an average LREE/HREE ratio of 10.94×10-6, and generally depleted Eu with an minimum δEu less than 0.31 especially in the ignimbrite and biotite granite, which have experienced a significant process of separation and crystallization of plagioclases.ΣREE at the main stage of the magmatic activity decreases with time.

地球化学特征显示矿区火山——侵入岩属于贫钠富钾的S型花岗岩，其w(SiO2)值为62.42%～78.02%、w(K2O +Na2O)值为7.66%～9.13%、w(K2O)/w(Na2O)比值为1.18～2.62、里特曼指数δ为1.67～3.78；矿区岩石LREE/HREE比值平均为10.94×10-6，属于轻稀土富集型；Eu普遍亏损，特别是熔结凝灰岩、黑云母花岗岩δEu＜0.31，表明经历了显著的斜长石的分离结晶作用；自早至晚主阶段岩浆活动稀土总量逐渐降低。

A complex black mineral occuring in pegmatites.

一种混合的黑色矿物，见于结晶花岗岩中。

The results show that the Dangchuan and Shimen granites have magma crystallization ages of 438±3 Ma and 220±2 Ma, respectively.

结果表明，党川花岗岩和石门花岗岩的岩浆结晶年龄分别为438±3Ma和220±2Ma。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。