特殊地质体翻译-中英对照
2个发现特殊地质体的斜孔，XK3在孔深71.2～77.9m（斜深）标高－59.91～-66.26处发现特殊地质体，水平投影宽约2.14m；XK4孔在63.4～70.7m（斜深）标高－61.35～-68.35处发现特殊地质体，水平投影宽约2.06m。3＃核岛特殊地质体地面（标高7.6m）揭露宽度7～14m，表明特殊地质体向下明显变窄了。
3个未发现特殊地质体的钻孔，XK1、XK2孔位于特殊地质体的东北侧，深度分别为168.59m和156.12m（均为斜深，下同），钻孔轨迹的水平投影超过特殊地质体西南边界（地面处）约2m；另一个斜孔XK5位于特殊地质体的西南侧，与XK1、XK3基本处在一条直线上，倾斜方向相反，深度135.20m，钻孔轨迹的水平投影超过特殊地质体东北边界（地面处）约1m（见图1-1）。从1－1’剖面（图3-13）可以看出，特殊地质体在XK1、XK5交点之上和XK3孔-66.26m之下尖灭了。
尖灭点的位置按内插法确定：取剖面1处特殊地质体边界的理论交点（图3-11中A点）和XK1与XK5交点（图3-13中B点）的中间位置，作为特殊地质体的尖灭点（图3-13中C点），标高-94m左右。
XK4孔发现特殊地质体的标高、水平投影宽度与XK3孔基本一致，而XK2孔没有发现特殊地质体，剖面1－1’和剖面2－2’的位置相距只有约32m，可以合理地认为剖面2－2’处特殊地质体在XK4和XK2之间尖灭了（图3-13），尖灭点的位置也在该标高位置。
图3-13 1—1’工程地质剖面图
图3-14 2—2’工程地质剖面图
4.特殊地质体的断面特征
为了研究特殊地质体的本身的地质特征及成因，2002年核二院对场地内揭露的特殊地质体4个人工剖面进行了详细研究，并在剖面上采取破碎带中的断层泥和碎粒岩，测定特殊地质体的新活动年龄。
（1）3＃核岛基坑东南壁剖面（剖面1，图4-1，照片4-1）
①微风化二长浅粒岩；②破碎带；③相对完整岩体
图4-1 3＃核岛基坑东壁特殊地质体露头素描图
剖面位置见图3-2。该剖面上特殊地质体呈现上窄下宽特征，下部宽度9.20m，上宽7.20m。特殊地质体和两侧围岩均为二长浅粒岩，特殊地质体原岩钾长石含量比两侧围岩偏多，破碎程度明显高于两侧围岩。特殊地质体与围岩呈断面接触，北断面产状72°∠79°，南断面产状238°∠84°。从北断面往南，0～5.0m为碎裂岩带，粒径1～20cm，磨圆度差，呈棱角状，由次级节理切割而成；5.0～9.0m岩石相对较完整，节理间距8～30cm，向南节理间距变宽；9.0～9.2m，碎裂岩带，角砾呈次圆状，9.2m处为南断面，断面上有厚1～2mm的咖啡色断层泥。
北断面以南30cm有一滑动面，滑动面上有厚约1cm的断层泥，灰绿色、褐色（照片4-2），该滑动面右下方有一组清晰的羽状剪节理，节理面光滑，闭合，略呈弧形，与该滑动面交角总体成15°～20°，越接近滑动面角度越大（见图4-1、照片4-3）。在碎裂岩带中有一长约5.3m、宽2.4m的构造透镜体（见图4-1），岩性为二长浅粒岩，微风化。
（2）3＃核岛基坑西壁剖面（剖面2，图4-2，照片4-4）
①微风化二长浅粒岩；②破碎带；③相对完整岩体
图4-2 3＃核岛基坑西壁特殊地质体露头素描图
剖面2与剖面1相距约66m（见图3-2），该剖面上特殊地质体亦呈现上窄下宽特征，下部宽约14m，该剖面处特殊地质体宽度虽然比剖面1处大，但破碎程度低于剖面1处。特殊地质体原岩和两侧围岩均为二长浅粒岩，破碎程度明显高于两侧围岩，破碎带与围岩呈断面接触，断面陡倾角。在该剖面上，特殊地质体从西至东依次为：破碎带，表现为碎粒岩，宽约20cm；相对完整岩体，节理发育，宽约2.0m；破碎带，表现为碎块岩，宽约2.0m；相对完整岩体，宽约约8.2m；破碎带，岩石破碎成碎粒岩～碎块岩，越近断面岩石越破碎，宽1.60m。东主断面外侧有断续分布的绿泥石片岩分布（照片4-5），绿泥石片岩表面上有不明显的擦痕，靠近断面的围岩钾长石含量高，为钾长浅粒岩。
（3）4＃核岛TC探槽西壁（剖面3，图4-3）
①微风化二长浅粒岩；②破碎带；③相对完整岩体
图4-3 4＃核岛探槽TC西壁特殊地质体露头素描图
Special geological bodies are found in two inclined holes. The special geological body of XK3 is found in the hole depth 71.2~ 77.9 m (along hole depth) -59.91~ -66.26 in elevation, and the horizontal projection width is about 2.14m. The special geological body of XK4 is found in the hole depth 63.4~ 70.7 m (along hole depth) -61.35~ -68.35 in elevation, and the horizontal projection width is about 2.06m. The exposure width of 3” nuclear island special geological body ground (elevation 7.6m) is 7~14m, indicating that the special geological body significantly narrowed down.
No special geological body is found in three inclined holes. XK1 and XK2 holes is located in the northeastern part of the special geological body, the depth is 168.59m and 156.12m respectively (both are hole depth, following the same). The horizontal projection of drilling trajectory is about 2m more than the southwestern boundary (ground surface) of the special geological body. The other inclined hole XK5 is located in the southwestern part of the special geological body, and it is located with XK1 and XK3 basically in a straight line. But it tilts in opposite direction, and the depth is 135.20m. The horizontal projection of drilling trajectory is about 1m more than the northeastern boundary (ground surface) of the special geological body (see figure 1-1). From 1-1’ profile (Figure 3-13) can be seen, special geological body pinch out above the intersection of XK1 and XK5 and below -66.26m of XK3 hole.
Pinch-out location of the point determined by interpolation: take the middle position between the theoretical intersection of special geological body boundary at profile 1 (Figure 3-11, A point) and the intersection of XK1 and XK5 (Figure 3-13, C point) as the pinch-out point of special geological body, elevation -94m or so.
The elevation and horizontal projection width of the special geological body found in XK4 hole is basically consistent with XK3, but no special geological body is found in XK2 hole. Because profile 1-1’ and profile 2-2’ localize only 32m away from each other, it is reasonable to consider special geological body pinches out between XK4 and XK2 at profile 2-2’ (Figure 3-13), and the pinch-out point is located at the elevation position.
Figure 3-13 1—1’engineering geology profile
Figure 3-14 2—2’ engineering geology profile
4. Characteristic of fracture surface of special geological body
In order to find out the geology feature and cause of formation of the special geological body, No.2 Research and Design Institute of Nuclear Industry carried out study to the 4 artificial profiles of the special geological body exposed in the area. They also took the gouge and rock pellet to measure the new active age of the special geological body.
（1）Profile of southeast wall of 3# nuclear island (Profile 1, Figure 4-1, and Photo 4-1)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rockbody
Figure 4-1 Sketch for outcrop of the special geological body in 3# nuclear island foundation pit
The position of the profile is in Figure 3-2; the special geological body shows a typical characteristic of wide at the top and narrow at the bottom, the width at bottom is 9.20m and at top is 7.20m. The special geological body and surrounding rock of both sides are leptite. The potash feldspar in special geological body is more than that in the surrounding rock, and the degree of crushing is higher than the surrounding rock. The special geological body contacts with surrounding rock by fracture surface, the north fracture surface is 72°∠79°and the south fracture is 238°∠84°.From north fracture surface to the south, there is cataclastic rock zone in 0 to 50m, the grain size is 1-20cm, the psephicity is not good and the shape is sharp, it is cut from secondary joint; from 5.0 to 9.0m, the rock is relative integrated, the space between joints is 8 to 30cm, and the joint become wider in the south; from 9.0 to 9.2m, it is cataclastic rock zone, the rubble is hypo-round, and the 9.2m position is south fracture surface, there is coffee fault gouge on it.
There is a sliding surface at south of north fracture surface, there is 1 cm of celadon and brown fault gouge on it (Figure 4-2); there is a group of clear shear joint at right below the sliding surface, the joint plane is smooth and closed, it presents as arc-shaped, the angle between the sliding surface and the joint is 15°to 20°, the angle grows as it is closer to the sliding surface (Figure 4-1, picture 4-3). There is a structural lenticular body in the cataclastic rock zone with the length of 5.3m and the width of 2.4m (Figure 4-1), it is leptite and is a little weathered.
（2）Profile of west wall of 3# nuclear island (Profile 2, Figure 4-2, and Photo 4-4)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rock body
Figure 4-2 3＃核岛基坑西壁特殊地质体露头素描图
The distance between profile 2 and profile 1 is about 66m (Figure 3-2). The special geological body shows a typical characteristic of wide at the top and narrow at the bottom. The width of the bottom is about 14m, though it is wider than profile 1, but the degree of crushing is less than profile 1. he primary rock and surrounding rock of the special geological body are both leptite, the degree of crushing is much more than the surrounding rock, the fracture zone contact with the surrounding wall by fracture surface, the fracture surface is dip angle. In the profile, the special geological body ranges from west to east is: fracture zone, presents as grain particles, it is 2.0m wide; relatively complete rockbody, it is about 8.2m wide;the fracture zone, the rock breaks to cataclastic rock and fragment rock, the degree of crushing grows as it is closer to the fracture surface with the width of 1.60m.There is distribution of chlorite schist at outboard of the east main fracture surface (Picture 4-5). There is unconspicuous scoring on the surface of chlorite schist, the content of potash feldspar is high at surrounding rock near the fracture surface, and it is potash leptite.
（3）West wall of TC trench in 4＃nuclear island (profile 3,Figure 4-3)
①Slightly weathered monzonitic leucogranulitite②Fracture zone;③relatively complete rock body
Figure 4-3 The outcrop sketch map of the west wall of TC trench in 4＃nuclear island
2013.2.23