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中文摘要：
马元铅锌矿床是扬子板块周缘发现的大型铅锌矿床之一,该矿床类型为密西西比河谷型（MVT）铅锌矿床。角砾状白云岩为主要的富矿岩系,可见脉状、透镜体状矿脉,矿体中富含大量的固体或者焦沥青,沥青为灰黑色,呈球颗状、细（网）脉状、液滴状或不规则状,与铅锌矿石密切共生/伴生在一起。沥青来源为上伏地层下寒武统郭家坝组黑色炭质板岩,构造活动对有机质运移产生重要作用。不同高程和不同形态沥青的反射率大致相同,沥青反射率3.10%4.71%,平均值为3.93%,有机质达到过成熟阶段,最大古地温（Tmax）261311℃,平均值288℃。
英文摘要：
Mayuan Pb-Zn deposit is one of the larges deposits found in the periphery of the Yangtze Plate,This deposit is type of Mississippi Valley-type（ MVT） Pb-Zn deposit. The main ore-bearing structure is brecciated dolomite,visible veins or lens-shaped veins,A lot of gray-black solid or coke asphalt in ore,stars like,fine（ net） vein,droplet-shaped or irregular shape,asphalt close symbiotic or associated with Pb-Zn ore. Lower Cambrian Guojiaba group black carbonaceous slate is the source of asphalt. Tectonic is play an important role in organic matter transport. Different elevation and Different forms substantially the same asphalt reflectance,the vitrinite reflectance of3. 10% ~ 4. 71%,the average of 3. 93%,Organic matter reached too mature stage,the maximum paleogeothermal（ Tmax） of 261 ~ 311 ℃,the average of 289 ℃.
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