CRUSTAL CONFIGURATION OF NW HIMALAYA: EVIDENCES FROM THE ISOSTATIC AND FLEXURAL ANALYSIS OF GRAVITY DATA

CRUSTAL CONFIGURATION OF NW HIMALAYA: EVIDENCES FROM THE ISOSTATIC AND FLEXURAL ANALYSIS OF GRAVITY DATA     

Campanian Climatic Change: Isotopic Evidence from Far East, North America, North Atlantic and Western Europe

Paleoclimatic settings have been reconstructed for the Campanian using original oxygen-isotopic analyses of well-preserved molluskan and foraminifera shells from Russian Far East, Hokkaido, USA, Belgium and some DSDP holes (95, 98, 102, 390A, and 392A) in North Atlantic. Early Early Campanian climatic optimum has been recognized from data on high bottom shelf water paleotemperatures in middle latitudes of both the western circum-Pacific (to 24.2°C) and the eastern circum-Pacific (to 26.4°C) areas and high bottom shallow water paleotemperatures in high latitudes of the Koryak Upland (22.4–25.5°C), which agrees with the data on the Campanian Barykovskaya flora in high latitudes (Golovneva and Herman, 1998) and Jonker flora and its equivalents in middle latitudes. Judging from the data on comparatively high bottom shallow water paleotemperature values in high latitudes, South Alaska (19.4°C) and the Koryak Upland (22.4–25.5°C), we also expect Latest Campanian temperature maximum, which has not been confirmed, however, for low and middle latitudes by neither of isotopic nor paleobotanic data now. Main climatic tendency during the Campanian (with the exception of Latest Campanian) has been learned from isotopic composition of Campanian aragonitic ammonoid shells from the Hokkaido-South Sakhalin (Krilyon) marine basin. In contrary to Huber’s et al. (2002) assumption, we expect warm greenhouse conditions during the most part of the Campanian.     

新疆塔里木盆地西部晚白垩世—早第三纪的沟鞭藻及疑源类

一、前言 新疆塔里木盆地西缘上白垩统一下第三系含有丰富的沟鞭藻及疑源类,此外多种无脊椎动物化石也很丰富。余静贤和张望平已对该区晚白垩世的沟鞭藻和疑源类作过初步研究。郝诒纯和曾学鲁等则对该区晚白垩世—早第三纪的有孔虫作了详细的研究。     

岩心和无岩心勘探钻进的一些技术经济资料

大大提高勘探钻进效率的潜力之一,是采用无岩心钻进方法。然而,直到目前,在矿床勘探时无岩心钻进的使用范围仍然不大。     

On the Possible Oil Fields in Szechuan as Indicated by Isocarb Lines

Ⅰ. INTRODUCTION From the considerations of the scattered oil occurrences and suitablegeological structures, the Red Basin of Szechuan has long been regarded as apromising country for oil prospecting. In the last decade much attention hasbeen paid by geologists and engineers to the search for oil resources in certain     

О ГЕОЛОГИЧЕСКОМ СТРОЕНИИ И РАЗВИТИИ ОКЕАНИЧЕСКИХ ВПАДИН

B ae两e宜皿e CoBPeMenH既reojor皿3aHI仪aeTea noqTn neKJD互nTe万bno reojorH可eeEn贾eTPoe·HHe址11 reo皿orR,eKo八ncToPne益MaTePnKoB,oeTaBJJI只3a nPe双ejaMn cB0ero BHHMaHnaBollPocH reojornn Texo面aeTen 3eMHoro maPa,孔oToPHe万。即HTHo孔eall撇H n 60刀L-班x,MH MoP狂Mn,flPn叹uH址nocje八Hero o6cTo扛TejbeTBao从eBn八HH,Ho BMecTe c TeM aeHon To,互To HeBo3Mo袱Ro roBoPllTL 0 noHnMaRnu 06爪且x 3aKoHoMePHoeTe盆cTPoeR“只HPa3B且Tll只3eMHo认KoPHB耳e皿oM及0 Tex noP no…     

普通大地构造学基本问题

大地构造学研究地壳的运动和变形,及被这些运动和变形所决定的岩层的产状。大地构造学确定地壳的运动历史,并阐明地壳运动发展过程中所遵循的规律,因此,它能够给予地壳构造演化的清晰概念,因为这种构造是由地壳的深部力量所控制的。大     

ОСНОВНЫЕ ВОПРОСЫ ОБЩЕЙ ГЕОТЕКТОНИКИ

reo了e;roHllKa n3ytlaeT只Bll狱eH。。H仄e小oPM呱1111 3e二Ho且KopH n Te中。pMH 3a江eran任只r叩HHx noPo仄,KoTOP班e oT,I,IH八“,‘狱e朋aM‘In几e币OpM明“扛Mxl onPe仄e皿扛10re只.OHa yeTa-E韶皿nBaeT IlcToPHro仄BH袱eH且益aeMHo认KoP址,BH扛cH扛eT 3aRoHoMePEocTI夏,孔oTo四 M oRnno几互xxH扛10Tc、江B cBoeM Pa3BnTlxnn,TaKnM o6Pa3oM,仄aeT ocMHe江eHHyro KaPTnHy oBo江ro耳nneTpoeRxl只3eMHo益KoP班,刀oeKo涯bKy aToe印oeHne o6yc涯oB皿llBaeTe扛r皿y6HH任HMn cn皿aMn3e五z皿rl.ll…     

形成沥青铀矿的化学环境

有几种铀的络离子在pH值、温度和压力的广泛变化范围内是稳定的。在25℃和中性溶液中,铀酰的碳酸盐络合物、氟化物络合物和氢氧化物络合物在溶液中能保持的浓度值在10~(-5)M和10~(-3)M之间。在较高温度(215℃)下,当pH值为7时,这些离子的溶解度仍在10~(-5)M以上。温度为25℃,pH值为7时,上述离子将与还原剂(H_2S)起反应,形成沥青铀矿很小的雏晶。在温度升高(215℃)和pH值为7时,有相似的反应,但在这种情况下沉淀的沥青铀矿雏晶较大。铀的络离子比较不稳定。在25℃时,从氢氧化亚铀溶液中析出了少量的沥青铀矿。而在较高温度(215℃)下,溶液中全部的铀都转变为结晶良好的沥青铀矿。     

THE OCCURRENCE OF CERCIS ASSOCIATED WITH THE REMAINS OF SINANTHROPUS

In a short paper entitled "Evidences of the Use of Fire by Sinanthropus",Dr.Davidson Black has discussed the occurrence of burned bone fragments andcharcoal debris in association with the remains of Sinanthropus at Chou KouTien,and has concluded that Sina