斑岩

Whole-rock Rb-Sr isochron age of 114Ma in Yanbei granite porphyry and single grained zircon U-Pb age of 138Ma in Tashan granite porphyry indicate that these two tin-bearing porphyry both are the products of Late Yenshan magmatic activity.

岩背花岗斑岩的全岩 Rb-Sr 等时线年龄（114Ma）和塌山花岗斑岩颗粒锆岩 U-Pb 年龄（138Ma）表明，这两个含锡花岗斑岩都是燕山晚期岩浆活动的产物。

According to the variation in the components of intermediateacid igneous rocks coming from the lower crust, it is possible to restrain the depth of the source area and the minimum thickness of the crust, and thus to provide important information for the study of the deep process of the continental intraplate mineralizationGlobally, many world level porphyry copper deposits and metallogenic systems formed by hypabyssal hot liquid have their close relationship with the synchronous adakite in spacetime and genesis; domestically, the adakitelike rocks have been identified to be related to the metallogenesis in the main metallogenic areas in ChinaThe recognition of adakitelike rocks having no relationship with the process of subduction makes it possible to construct a metallogenic model of continental intraplate porphyry metal deposits by combining other geological evidences, and this model is totally different from the metallogenic model of porphyry copper deposits with Bsubduction setting constructed by Sillitoe (1972)The existence of adakitelike rocks may be the necessary condition but not the sufficient one for forming the largescale porphyry deposits and the hypabyssal hotliquid deposits, whose metallogenic elements mainly came from the mantleThe metallogenic potential of adakitelike rocks is achieved by the entering of the mantle material, and the metallogenic specialization of adakitelike rocks is decided by the distribution characteristics of the metallogenic elements in the upper mantleAn important reason for the adakitelike magma related to subduction being advantageous to mineralization is that there were abundant high pressure and high temperature liquid coming from the subducted platepieces and the magma of high fO2 coming from the melting of subducted platepiecesHowever, for those adakitelike rocks, whose occurrence has continental plate background but does not relate to the subduction, their metallogenic mechanism is not clear yetBased on the concept of modern mineral exploration and combined with the analysis of integrated geological information, we may better realize the practical prospecting significance of the adakitelike rocks

根据起源于下地壳的中酸性岩浆岩的成分变化，可以约束其源区深度以及地壳最小厚度，为大陆板内成矿作用的深部过程研究提供重要信息。全球范围内，许多世界级斑岩铜矿和浅成热液矿化系统与同期的埃达克质岩存在密切的时空与成因联系，在国内主要成矿区带也识别出与金属成矿作用有关的埃达克岩。与俯冲过程无关的埃达克质岩的识别，使我们有可能结合其他地质证据构建完全不同于Sillitoe(1972)B型俯冲环境的斑岩铜矿成矿模式的大陆板内斑岩型金属矿床成矿模式。对于规模巨大、矿质主要源自地幔的热液矿床的形成，埃达克岩可能是必要条件，但不是充分条件。埃达克岩的成矿潜力通过地幔物质加入而获取，埃达克岩的成矿专属性由上地幔成矿元素分布特征决定。与俯冲有关的埃达克质岩浆之所以有利于成矿，重要的原因是存在大量来自俯冲板片的高压、高温流体以及俯冲板片熔融形成高氧逸度(fO2)的熔体，但产出在大陆板内背景、与俯冲无关的埃达克岩的成矿机制还不清楚。根据现代资源勘查理念，结合综合地质信息分析，埃达克质岩具有实际找矿意义。

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。

High pressure and temperature experiment show that lamprophyric melt and orthophyric melt mix with each other under high pressure and seperate under low-pressure.

结合哀牢山断裂带富碱侵入岩的地质地球化学资料，论证了煌斑岩与富碱侵入岩为富集地幔不同部分熔融程度的产物；高温高压实验表明，煌斑岩熔体和花岗斑岩熔体在高压条件下发生混合，低压条件下出班分离，加上有关的地球化学判别，推测岩浆混合作用是本区煌斑岩与花岗斑岩(富碱侵入岩母岩浆同化分异结晶作用的产物)密切共生的主要因素。

The mafic dikes also formed by the partial melting of enriched mantle, include gabbro, diabase and lamprophyres (camptovogesite, odinite and hornblende lamprophyres).

基性脉岩主要包括辉长岩、辉绿岩和煌斑岩(以斜闪煌斑岩为主，同时含部分拉辉煌斑岩和角闪煌斑岩)，都为富集岩石圈地幔部分熔融的产物。

There are three genetic types of mineral deposits in the Beiya ore district:① Cu-Au polymetallic deposits related to alkaline porphyries, comprising porphyritic Cu-Au deposits and polymetallic skarn deposits related to quartz-albite porphyry and quartz-K-feldspar porphyry;② Fe-Au deposits related to gabbro or basalt magma, consisting of magmatic Fe-Au deposits and sedimentary polymetallic deposits formed in caves and lakes; and ③ palaeo-placers formed at the weathering surface, in lakes and in karsts.

北衙金矿有3种成因不同的矿床：①与碱性斑岩有关的铜金多金属矿，包括与石英钠长斑岩和石英正长斑岩有关的斑岩型铜金矿床和矽卡岩型多金属矿床；②与辉长－玄武岩浆有关的铁金矿床，包括熔浆型铁金矿床和喷流沉积型多金属矿床，后者又有洞穴和湖相沉积环境之分；及③古砂矿，有古风化壳型砂矿、河湖相古砂矿和洞穴沉积古砂矿。

Xiangshan volcano-intrusive complexes is the wall rock of the biggest volcanic-rock uranium ore deposit in China, and the main body is rhyolitic porphyroclastic lava, accompanied by hypahyssal or ultra-hypabyssal intrusive rocks such as dacite-porphyry and granite-porphyry Jiulongzhang volcano-intrusive complexes are dominantly rhyolitic welded tuff, accompanied by dacite-porphyry and quartz monzonite-porphyry, and so on, and the uranium resources are being assessed.

相山火山－侵入杂岩是华南地区最大的火山岩型铀矿赋矿围岩，其主体岩石为流纹质碎斑熔岩，浅成－超浅成侵入岩有英安斑岩、花岗斑岩等；九龙嶂火山－侵入杂岩的铀资源潜力尚待评价，主体岩石为流纹质熔结凝灰岩，浅成－超浅成侵入岩有英安斑岩、石英二长斑岩等。

Based on detailed geological observation and precise dating of porphyries in combination with data available, the authors hold that the Indosinian porphyries in the Zhongdian island arc zone can be divided into two parts, i.

在较为详细的野外地质观测和精确的同位素测年的基础上，结合前人资料，将中甸地区的印支期岛弧斑岩体分为东、西两个斑岩带，东斑岩带形成于 2 1 8～ 2 0 3Ma ；西斑岩带形成于 2 4 2 。92～ 2 37.5Ma。

Based on detailed geological observation and precise dating of porphyries in combination with data available, the authors hold that the Indosinian porphyries in the Zhongdian island arc zone can be divided into two parts, i.e., the eastern porphyry belt formed during 218～203 Ma and the western porphyry belt formed during 242.92～237.5 Ma.

在较为详细的野外地质观测和精确的同位素测年的基础上，结合前人资料，将中甸地区的印支期岛弧斑岩体分为东、西两个斑岩带，东斑岩带形成于 2 1 8～ 2 0 3Ma ；西斑岩带形成于 2 4 2 。92～ 2 37.5Ma。喜马拉雅期(5 3.0 2Ma)斑岩叠加于早期的斑岩体之上，与斑岩铜矿化关系密切。

The ages, natures and tectonic environments of the Bangong Co porphyry copper belt have been preliminarily determined through a study of ore-bearing porphyries in the Dobuzha and Garqiong porphyry copper deposits in the porphyry copper belt.

通过对藏西班公湖斑岩铜矿带多不杂和尕尔穷2个大、中型斑岩铜矿床含矿斑岩的研究，初步查明了该铜矿带的形成时代、含矿斑岩性质及成矿构造环境。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失