ON THE OCCURRENCE OF LYSTROSAURUS IN SINKIANG~1

The presence of Dicynodontia in Sinkiang was first made manifest by the beautiful skull described in the same number of the Bulletin, (see above 563) as Dicynodon sinkianensis sp. nov. Recently, a second skull also collected by     

ON THE OCCURRENCE OF AN INTERESTING FOSSIL WOOD FROM URUMCHI(TIHUA)IN SINKIANG~1

The fragment of fossil wood forming the main subject of this paper was collected by P. Teilhard de Chardin when he was sent to Sinkiang by the Geological Survey of China, with the Haardt-Citroen Expedition (1932).     

ON THE DISCOVERY OF A NEW DICYNODON IN SINKIANG~1

One of the most important results obtained by the Sino-Swedish Expedition led to Sinkiang by Dr. Sven Hedin during the years 1925-1931, has been the discovery, by Professor Yuan, of a rich Permo-Triassic reptilian     

ON THE OCCURRENCE OF ARISTOCYSTIS FAUNAS IN CHINA

The present collection made by S.S.Yoh in 1927 from the MiddleOrdovician of Kweichou contains five species of cystoids. During my furlough (1935-1936) I had the chance to compare thematerial with Jaekel's originals in Berlin,Reed's originals in Cambridgefind have as a result been able to determine the following species in our     

ON THE OCCURRENCE OF THE MANTICOCERAS FAUNA IN CENTRAL HUNAN

INTRODUCTION Mr.K.K.Chao (赵金科) of the National University of Peking hasrecently brought back several specimens of the Goniatites from the ShaitienchiaoSeries of Huaishuichuang (槐树荘) near T'iaomachien (跳马涧),Changsha     

ON THE OCCURRENCE OF GIGANTOPTERIS FLORA IN CHEKIANG PROVINCE

Since Richthofen's first discovery of Gigantopteris flora in southern Hunan, it has been found to occur very extensively in China. This remarkable flora not only presents certain palaeobotanical interests but appears very important in determining the geological age of many coal-bearing series.     

蒙脱石中铁的赋存状态的研究

通过对徐闻、三水、高州等地五个样品的Ｘ射线衍射分析，化学全分析，分析它们为含铁量不同的蒙脱石，层间可交换阳离子主要为Ｃａ＾２＋。几个样品穆斯堡尔谱表明铁主要以Ｆｅ＾３＋的形式存在，含铁量较高的样品ＸＧＡ、ＸＳＡ、ＳＳ的谱可以拟合出Ｆｅ＾３＋的二对四级双峰，表明铁在蒙脱石中占据两种不等同的八面体位置。     

ON PRINCIPAL RULES IN THE OCCURRENCE OF OIL AND GAS ACCUMULATIONS IN THE WORLD

Anomalous coarse-crystalline garnet amphibolites and possible retrograded eclogites in varying stages of replacement by sodic amphibole + epidote assemblages compose exotic boulders (tectonic blocks) resting unconformably on serpentinite and finergrained, lower-greenschist-grade metabasites and metapelites in the Coastal Range of Chile (41° S Lat.). Major-and trace-elemental compositions of the tectonic blocks are similar to metapillow basalts and metavolcaniclastics within the underlying, in situ, metamorphic complex. Phase compatibilities and mineral compositions within the coarse blueschist/amphibolite suggest both a higher maximum pressure (greater burial depth) and higher P-T retrograde path for the tectonic blocks than for the in situ greenschists, suggesting an inversion of their relative structural position after metamorphism.

Coarse amphibolite-grade metabasites forming the lower portion of a primitive arc system may have been detached from the upper plate and subducted to deeper levels within a zone of distributed shear, resulting in the formation of high-P/T blueschist minerals. A K-Ar age of 304 + 9 Ma on white mica from one of the blueschist blocks is similar to previous ages from the regional metamorphic complex, and suggests that ascent of the tectonic blocks marginal to or within serpentinite diapirs occurred during an early stage of late Paleozoic orogenesis along the Gondwanide margin. Post-orogenic static uplift, sedimentation, and differential erosion then resulted in the present surficial distribution of the blueschist boulders.     

ON THE OCCURRENCE OF LYTTONIA FAUNA IN THE VICINITY OF KWEI-YANG,KWEI-CHOW PROVINCE

The so-called Lyttonia Fauna in its broader sense, is known at presentto have an universally wide geographical distribution. It had been reportedoccurring in Texas and Canada of North America; Palermo of Mediterranean     

新疆南部早二叠世美羊齿类的发现

保存良好的Autunia conferta.和Dichophyllum flabellifera近来在新疆塔里木盆地西北缘下二叠统上部的发现,是在塔里木盆地的首次记录.这两个种以前曾被归于Callipteris属内,后来Kerp指出该属的属名有问题,便与Haubold提出了形态属Callipteris的重新划分方案,这一方案笔者表示完全同意.A.conferta是欧美植物群中早二叠世常见分子,在中欧的少数地点亦见于上石炭统上部,在中国则极少发现,仅见报道于河北开平赵各庄群上部和山西太原下石盒子组.D.flabellifera是欧美植物群中的另一早二叠分子,在西欧和北美的上石炭统上部亦见少数先驱分子,在华夏植物群中从未发现过.本文记载为其在国内首次记录.上述发现在古植物地理上具有一定意义.     

湖南黄金洞金矿床毒砂中金的赋存状态的研究

本文对湖南黄金洞金矿主要载金矿物毒砂进行了金含量、X射线衍射、电子探针、扫描和透射电镜、电子顺磁共振波谱及穆斯堡尔谱等系统分析研究.结果表明,含金毒砂在成分上及结构上都明显地偏离理想毒砂;金含量高而稳定;毒砂中的铁为F_e~(3+);金主要呈晶格金存在,以类质同象形式置换毒砂中的砷.     

扬子古板块的形成及其对中国南方地壳发展的影响

六十年代以来,人们在海洋和大陆边缘积累了大量地质、地球物理和地球化学资料,应运而生的“板块学说”,把人们的视野扩展到占地球表面百分之七十的广阔海域,使人们看到了有关洋壳演变为陆壳的许多独特的地质现象,使原来主要在大陆上获得认识的一些地质现象要求新的解释。本文将在前人地质资料基础上,利用板块学说探讨扬子古板块的形成和对中国南方地壳发展的影响。     

煤中砷的赋存状态

砷是煤中常见的有害微量元素,由于其丰度较低,定量研究其赋存状态一直很困难。近年来,采用逐级化学提取实验方法对煤中不同赋存状态的砷进行了定量研究,综合分析这些研究可得出以下结论：①煤中砷的赋存状态包括硫化物态砷、有机态砷、砷酸盐态砷、硅酸盐态砷、水溶态和可交换态砷。总体上,硫化物态砷＞有机态砷＞砷酸盐态砷＞硅酸盐态砷＞水溶态和可交换态砷,但在不同的煤样品中,也表现出较大的差异性。②一般而言,煤中大部分砷存在于含砷黄铁矿中,含砷黄铁矿中的砷含量与黄铁矿的成因或类型有关。煤中的砷酸盐态砷主要与铁氧化物和氢氧化物共生;硅酸盐态砷主要进入粘土矿物晶格。③在砷含量较低的煤样品中,有机态砷含量较高,其中在褐煤和低煤级烟煤中,可提取出与腐殖酸和富里酸结合的砷。当前还难以确认有机态砷的化学结构。④贵州特高砷煤中砷的赋存状态较为复杂,在某些样品中与氧结合的有机态砷为主要的赋存状态。     

ON THE OCCURRENCE OF CRUZIANA (BILOBITES)IN YUNNAN AND SZECHUAN

Cruziana-localities in China. The fossil animal trails known as Bilobites have been found for the firsttime in China by A.F.Legendre in 1910 at the surface of a sandstone forma-tion near the village Tapishan,NE of Paimakou (白马口),Luchuan-     

某热液沉积矿石中伴生银的赋存状态研究

某热液沉积型铜铅锌多金属矿石伴生丰富的银。工艺矿物学研究表明，该矿石银的赋存状态有着其独特之处，银赋存与铜矿物密切相关，银主要以较罕见的硫铜银矿矿物形式产出，嵌布于斑铜矿微裂缝中。     

ON THE OCCURRENCE OF LYTTONIA IN THE WOLFCAMP SERIES OF THE GLASS MOUNTAINS OF TEXAS WITH NOTES ON LYTTONIDS FROM SOUTHWESTERN CHINA

The Glass Mountains of Trans-Pecos Texas is one of the classicalregions of Permian stratigraphy,which has lately become world-famousthrough the painstaking works of the King brothers.During my short     

不可见金赋存状态研究现状

综述了近年来不可见金赋存状态研究的新近展,包括：卡林型金矿床,部分其它类型中温热液金矿床中金和一些块状硫化物矿床中的伴生金的赋存状态研究;一些载金矿物合成实验研究。评述了不可见金赋存状态研究中有待进一步探索的一些问题。最后提出了可能有助于金矿床研究的几个方面。