中国东部苏鲁地区江苏赣榆出露大理岩-榴辉岩块体，其菱镁矿大理岩中保存的白云石分解结构表明地壳物质俯冲深度达到-200公里。在与该大理岩共生的榴辉岩中，我们发现了磷灰石的磁黄铁矿出溶结构。磷灰石是该榴辉岩的主要副矿物，其自形程度较高，与石榴石共生。样品中几乎所有磷灰石均发育出溶结构，至少存在两组相互垂直的出溶棒，它们各自严格沿同一个方向分布。出溶棒形状规则，宽度相近(1µm)，但长度变化大(5～50µm)。利用高分辨能谱仪测定其能谱，结果表明，出溶棒主要同Fe和S两种元素组成，但不能准确地确定其Fe/S比值。我们把这种出溶棒初步确定为磁黄铁矿(Fe1-x S)。磷灰石由于含大量稀土元素和挥发性组分如OH、F、Cl等以及我们所观察到的S，它的深循环因此可能对地球的水、硫以及其它挥发性组分的全球平衡具有重要影响。本文报道的磷灰石中磁黄铁矿出溶结构为深入探讨这个基本科学问题提供了一个新的突破口。

The chemical composition of a barren biotite granite, a two-mica granite, and a rare metal-bearing pegmatite (the No. 3 vein in Keketuohai, Altay Mountains, northwest China), along with mineral separates of apatite and mica, were analyzed and compared in the present work. Bulk chemistries of biotite granite, two-mica granite, and pegmatite rim are consistent with fractional crystallization trend from granites toward pegmatite. Changes in pegmatite composition can be explained mainly by fractional crystallization of biotite. Rb–Sr isochrons yield 248.8±7.5 Ma for the biotite granite, 247.8±6.3 Ma for the two-mica granite, and 218.4±5.8 Ma for the pegmatite rim. Similar geochemical characteristics, including initial εNd (T) values (ranging from -0.76 to -3.04) for apatites, similar initial 3Nd (T) values for whole-rock samples of studied granites and pegmatite (ranged from-1.40 to-3.21) and for biotites from granites (ranged from-2.75 to-3.15) suggest that these rocks were derived from a common magma source. Old continental crust may have played a significant role in magma generation. Based on these data, we interpret the evolution of the Keketuohai granite–pegmatite by magma differentiation from a common source. Biotite granite was the first to crystallize, followed by two-mica granites. The residual melt was probably stored in a granitic batholith. The pegmatite veins were injected ～30 M. y. later during another episodic tectono-magmatic event in the Altay Mountains. © 2005 Elsevier Ltd. All rights reserved.

The Wangfeng–Tianger–Saridala ore district consists of over 20 orebodies with total proven gold reserves exceeding 15 tonnes. The district is located on the EW-striking Tianger (Bingdaban) shear zone in west Tianshan Mountains, northwest China. The lensoid orebodies are distributed along the shear zone in a region about 25 km in length and 1 km in width. Enhanced fluid flow and fracturing controlled location and orientation of mineralized zones during deformation along narrow shear bands oriented oblique to the overall shear zone margins. Fabrics in fractures and strain shadow overgrowths generally plunge steeply, parallel to the lineation in the surrounding cataclasite matrix consisting of new grains of quartz and minor amounts of micas. Native gold occurs inmylonitized granites ormylonitized sulfide–mica–quartz veins.Gold grade is closely relatedwith the occurrence of sulfide–quartz veins. Pyrite and pyrrhotite in gold-bearing sulfide–quartz veins contain inclusions of native gold. Chondrite-normalized rare earth element (REE) distribution patterns for pyrite from the orebodies show light REE enrichments and negative Eu anomalies. Relationships between gold contents and Th/U, Zr/Hf and (La/Yb)N values for pyrites imply that gold-rich pyrites are different from goldpoor pyrites, thus indicate that the pyrites in the orebodies have a different origin compared with those in wall rocks. A Rb–Sr isochron for the mylonitized Au-bearing quartz veins indicates an age of 224±14 Ma with an initial 87Sr/86Sr ratio of 0.7294±0.0089 (MSWD=1.1). This age is conformed by 40Ar/39Ar dating on muscovites (220.9 to 222.5Ma), which is interpreted as the age of ore-formation in the Tianger deposit. High initial 87Sr/86Sr ratios (0.7294), high δ34S values (+11.2 to +16.5‰), low δ18OH2O values (1.67 to 3.07‰) and low δD values (−84 to −104‰) indicate that the ore-forming fluid was unrelated to any magmatic process. © 2006 Elsevier B.V. All rights reserved.

克拉玛依白碱滩尖晶石二辉橄榄岩主要由橄榄石、单斜辉石、斜方辉石和尖晶石组成，橄榄石和斜方辉石均发生程度不等的蛇纹石化。单斜辉石一般很新鲜。单斜辉石和斜方辉石均发育出溶结构!出溶条纹或者平直或者发生舒缓的弯曲变形(即便是在发生弯曲的情况下也是完全平行的)。透辉石-普通辉石出溶体一般呈针状(直径一般为1µm，长度>150µm)，顽火辉石出溶条纹直径一般为1-3µm(长度>300µm)。斜方辉石主晶属于顽火辉石-易变辉石，单斜辉石主晶为透辉石(成分很均一)。地质温度压力估算表明，白碱滩二辉橄榄岩中辉石出溶结构发生的温度为700ºC-1000ºC),压力为2.0-2.7GPa，它们代表辉石出溶结构形成的最低PT条件。白碱滩二辉橄榄岩至少经历了三个演化阶段：原始辉石与尖晶石和橄榄石平衡共生(阶段I.>94km)；随着地幔上隆，原始辉石结构不稳定，分解并形成出溶结构(阶段II, 700ºC-1000ºC)，斜方辉石开始分解的深度为94km，单斜辉石开始分解的深度为78 km；之后，蛇绿岩经历的侵位事件导致辉石发生塑性变形(阶段III)。蛇绿岩侵位之前，地幔岩曾发生了>50 km的隆升，而且，在隆升过程中地幔岩没有发生明显部分熔融(地幔岩因此没有经历明显的岩浆抽提过程)。

在我国境内塔尔巴哈台山下石炭统黑山头组泥岩、粉砂岩、凝灰岩和火山熔结角砾岩夹基性熔岩的底部识别出一套蛇绿混杂岩。火山角砾的角砾由蛇纹石化橄榄岩(蛇纹岩)、辉长岩、玄武质粗面安山岩、粗面岩和硅质岩组成。蛇绿混杂岩由蚀变辉长岩、蛇纹岩和硅质岩组成，橄榄岩虽然发生了强烈蛇纹岩化(现在为蛇纹岩)，但蛇纹岩中保留了斜方辉石和橄榄石的假象。覆盖在该蛇绿岩套之上的火山角砾岩属于爆发性很强的火山喷发产物。巨大的粗粒辉长岩、玄武质粗面岩、粗面岩、硅质岩和蛇纹石化橄榄岩角砾被熔岩胶结，说明火山通道穿切了蛇绿岩套。蚀变辉长岩中的斜方辉石已经完全蛇纹石化(保留了斜方辉石假象)，斜长石完全被水钙铝榴石交代(保留斜长石假象)，但单斜辉石保存完好，且发育由尖晶石叶片(棒)构成的出深结构。棕褐色的尖晶石出溶棒(或叶片)一般完全平行，个别情况下发现两组近于直交的尖晶石出溶棒。从蚀变辉长岩中分选出锆石，对其的SHRIMP年代学研究，结果表明辉长岩的形成时代为478.3±3.3Ma (MSWD=1.09, n=14)。说明塔尔巴哈台蛇绿岩套岩石形成于早奥陶世。