塔里木盆地北缘奥陶系古溶洞和古岩溶沉积中包壳砾石和包壳砾岩的发现及特征*
钟建华1, 倪良田1, 曹梦春1, 陈鑫2, 张丹锋3, 孙宁亮1, 郝兵1, 刘闯1, 邵珠福4, 牛永斌5

Discovery and characteristics of coated gravels and coated conglomerates from the Ordovician karst cave and sediment in northern margin of Tarim Basin
Zhong Jianhua1, Ni Liangtian1, Cao Mengchun1, Chen Xin2, Zhang Danfeng3, Sun Ningliang1, Hao Bing1, Liu Chuang1, Shao Zhufu4, Niu Yongbin5
塔里木盆地北缘奥陶系一间房组硫磺沟2号溶洞底部包壳砾石特征^1—钙华核心包壳砾石,核心是钙华,系先期形成的钙华壳被破碎成砾石后再度被包壳包裹形成;2—钙华核心包壳砾石,核心是钙华砾岩,由3~4个次级的钙华砾石组成,后被钙华包壳包裹,包壳厚度不均,左上角最薄、圈层不明显,右上角最厚、圈层非常明显,钙华圈层因含油而呈褐色;3—钙华核心包壳砾石,核心是钙华砾岩,由4~5个次级的形态和结构都非常复杂的钙华砾石和包壳砾石组成,尔后又被钙华包壳包裹,钙华圈层因含油而呈褐色;4—砂岩核包壳砾石,核心为粉砂岩,圈层发育,含油