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石场－中楼盆地位于郯庐断裂带中段的沂河－沭河地区。郯庐断裂左旋切割了秦岭－大别－胶南造山带及前中生代地层，研究区内沂河－沭河断裂切割了年龄为１３６．２Ｍａ（４０Ａｒ／３９Ａｒ法）的胶南造山带北缘剪切带，并被时代为１１９Ｍａ（Ｋ－Ａｒ法）的青山群地层不整合覆盖，显示郯庐断裂在早白垩世曾发生了明显的走滑运动。石场－中楼盆地受沂河－沭河断裂的控制，整体为长６０ｋｍ、宽３０ｋｍ，长宽比近于２∶１的“菱型”构造盆地。盆地内早白垩世莱阳群的沉积厚度大于６２６３．７１ｍ，沉积速率大于０．４ｍｍ／ａ；沉积相特征反映盆地具有深而窄，沉积速度快、沉积相变剧烈的特点。盆地沉积中心的迁移方向与边界断裂的左旋走滑效应一致，“边走滑边沉积”的特征明显。根据构造背景、构造格架及沉积特征，确定石场－中楼盆地为郯庐断裂早白垩世左旋走滑过程中形成的拉分盆地。
Rock Field - Zhonglou Basin is located in the middle of the Tan-Lu fault Yi River - Shu area. The Qinling-Dabie-Jiaonan orogenic belt and the Pre-Mesozoic strata were cut by the left-hand rotation of the Tancheng-Lujiang fault. The shear band of the northern edge of the Jiaonan orogenic belt with an age of 136.2 Ma (40Ar / 39Ar) was cut from the Yihe-Shuhe fault in the study area And was unconformably covered by the Qingshan Group in the age of 119 Ma (K-Ar method), indicating that significant slip-strike occurred in the Early Cretaceous of the Tan-Lu fault. The stone field-Zhonglou basin is controlled by the Yihe-Shuhe fault. The whole is a “rhombic” tectonic basin with a length of 60km, a width of 30km and an aspect ratio of nearly 2: 1. The depositional thickness of the Early Cretaceous Laiyang Group in the basin is more than 6263.71m and the sedimentation rate is more than 0.4mm / a. The characteristics of sedimentary facies indicate that the basin is characterized by deep and narrow sedimentation velocity and rapid depositional facies change. The migration direction of the sedimentary centers in the basin is consistent with the left-lateral strike-slip effect of boundary faults, and the characteristics of “sedimentation along the slippery edge” are obvious. According to the tectonic setting, tectonic framework and sedimentary characteristics, the Shichang-Zhonglou basin is defined as a pull-apart basin formed during the Early Cretaceous left-lateral strike-slip of the Tan-Lu fault.