福建晚三叠世—中侏罗世地层划分

福建晚三叠世－中侏罗世地层以陆相盆地沉积为主，仅闽西南局部有海陆交互相沉积。地层分区大致以政和一大埔断裂为界，分为闽西地层小区和闽东地层小区。根据各盆地地层序列及岩石组合特性，岩石地层单位可划分为陆相沉积的大坑村组，文宾山组、焦坑组、梨山组及漳平组和以海陆交互相沉积的象牙群，包括下材组和藩坑组。其中大坑杆组相当于年仝层单位的上三叠统卡尼一诺利阶，文宾山组、焦坑组相当于诺利阶上部一瑞替克价，梨山组相     

福建省印支期磨拉石建造的探讨

通过对福建省三叠纪地层基本特征的野外观察及室内分析,认为中三叠世的安仁组属于印支造山运动同造山期的磨拉石建造;而晚三叠纪的大坑村组、文宾山组、焦坑组则是代表新构造旋回底部层序沉积的磨拉石建造。     

西藏措勤盆地的地层学研究进展及上二叠统—侏罗系地层序列的厘定

本文简要总结了西藏措勤盆地相关区域的地层学研究进展。近年来,笔者及研究团队对措勤盆地及邻区进行了多次野外地质调查和室内古生物鉴定和研究,获得了一些新的发现和认识,在结合前人在相关地区取得的地层学成果和资料的基础上,厘定了该地区上二叠统—侏罗系的地层序列。措勤盆地的上二叠统是以文布当桑组为代表的灰岩和以木纠错组为代表的白云岩。三叠系存在着广海陆棚相和碳酸盐岩台地两种地层序列:前者自下而上划分为下三叠统嘎仁错组、中三叠统至上三叠统卡尼阶珠龙组、上三叠统诺利阶江让组、上三叠统瑞替阶至下侏罗统敌布错组;后者自下而上划分为木纠错组、待建的中三叠统、上三叠统诺利阶麦隆岗组和上三叠统瑞替阶至下侏罗统的确哈拉组。下侏罗统与上三叠统瑞替阶难以区分开。中侏罗统的岩性为深海-半深海相泥岩夹有基性-超基性岩。上侏罗统自下而上划分为萨波直不勒组和吐卡日组,目前尚未发现提唐阶的化石,因此推测下白垩统多尼组和吐卡日组之间有沉积间断。措勤盆地在晚二叠世—早三叠世、晚三叠世诺利期和晚侏罗世牛津期—基默里奇期都处于碳酸盐岩台地环境,冈底斯地区在中三叠世和中侏罗世发生了2期构造伸展事件,在晚三叠世诺利期末期和晚侏罗世基默里奇期晚期发生了两次构造抬升事件。构造伸展和挤压抬升造成了海平面的反复升降变化,导致了深水和浅水沉积相的垂向叠置,为油气成藏创造了良好的沉积建造组合条件。上二叠统—侏罗系地层序列还有待于进一步完善,应该加大地层古生物学的投入力度。     

福建省闽清县池园地区早、中株罗世地新发现

福建中部闽清园－上莲一带晚侏罗世南园组火山岩地层之下覆盖着一套沉积－火山岩,原划归晚侏罗世长林组,通过对该地区1∶500000区调,依岩性组合特征、同位素地质年龄值、古生物化石及接触关系等资料,重新厘定划分为梨山组、藩坑组、漳平组。早侏罗世藩坑组的发现为福建中部火山岩基底地质构造研究、火山岩区找矿提供新的线索。     

西藏措勤盆地的上古生界—下中生界：潜在的油气沉积建造

新的地层和古生物学研究结果表明,措勤盆地在晚古生代一早中生代不存在长达75Ma以上的沉积间断．其中,晚二叠世-晚三叠世诺利期都是海相碳酸盐岩地层,晚三叠世瑞替期-早中侏罗世为陆缘碎屑岩地层．两者之间为角度不整合接触．措勤盆地在晚二叠世-晚三叠世诺利期一直处于海相碳酸盐岩盆地中．晚三叠世瑞替期-早中侏罗世仍然是接受巨厚沉积的低洼地区。从宏观的油气勘探的战略评价角度看．措勤盆地在中二叠世栖霞期-晚三叠世诺利期的海相碳酸盐岩地层具有生油层的性质,上三叠统瑞替阶-中下侏罗统具有盖层的性质,两者之间的角度不整合具有储集层的性质。措勤盆地中二叠统-下侏罗统构成一个油气的有利勘探层系．称为古格层系。     

西藏措勤盆地的上古生界-下中生界：潜在的油气沉积建造

新的地层和古生物学研究结果表明,措勤盆地在晚古生代一早中生代不存在长达75Ma以上的沉积间断．其中,晚二叠世-晚三叠世诺利期都是海相碳酸盐岩地层,晚三叠世瑞替期-早中侏罗世为陆缘碎屑岩地层．两者之间为角度不整合接触．措勤盆地在晚二叠世-晚三叠世诺利期一直处于海相碳酸盐岩盆地中．晚三叠世瑞替期-早中侏罗世仍然是接受巨厚沉积的低洼地区。从宏观的油气勘探的战略评价角度看．措勤盆地在中二叠世栖霞期-晚三叠世诺利期的海相碳酸盐岩地层具有生油层的性质,上三叠统瑞替阶-中下侏罗统具有盖层的性质,两者之间的角度不整合具有储集层的性质。措勤盆地中二叠统-下侏罗统构成一个油气的有利勘探层系．称为古格层系。     

福建省闽清县池园地区早、中侏罗世地层新发现

福建中部闽清池园—上莲一带晚侏罗世南园组火山岩地层之下覆盖着一套沉积 -火山岩 ,原划归晚侏罗世长林组 ,通过对该地区 1∶ 50 0 0 0区调 ,依岩性组合特征、同位素地质年龄值、古生物化石及接触关系等资料 ,重新厘定划分为梨山组、藩坑组、漳平组。早侏罗世藩坑组的发现为福建中部火山岩基底地质构造研究、火山岩区找矿提供新的线索。     

滇中鱼坝村组的建立及陆相侏罗系底界

滇中及相邻地区上三叠统舍资组含煤层与下侏罗统冯家河组红层之间，连续沉积了一套杂色细碎屑岩过渡层。其分布稳定，该层所含化石及磁性地层特征表明其时代属早侏罗世。因此建立下侏罗统鱼坝村组，并确定该组底界为陆相侏罗系的底界。     

西藏昂仁县孔隆地区木纠错组诺利期牙形石的发现及其地质意义

拉萨地块晚二叠世-三叠纪地层的研究对认识青藏高原前新生代特提斯演化具有重要意义,但目前对该时期的沉积充填序列及古地理环境尚未形成统一认识.通过对西藏昂仁县孔隆地区开展的详细地层和牙形石相关研究,在木纠错组上部发现了晚三叠世诺利期Epigondolella sp.牙形石分子,在下拉组顶部发现了时代跨越晚二叠统长兴阶和早三叠统印度阶的牙形石Hindeodus typicalis;从而将研究区木纠错组时代重新厘定为晚二叠世长兴期至晚三叠世诺利期,指示拉萨地块西部三叠纪应仍为连续的浅海相沉积.      

南京岔路口硫铁矿成矿控制因素及其成因探讨

<正> 南京岔路口硫铁矿位于南京市东北郊。自1978年以来,陆续在朝阳洞山南坡及聚宝山南发现了硫铁矿的盲矿体。其特点是埋藏浅,品位富,便于开采利用。一、矿区地质简况 (一)地层本区出露地层有中三叠统周冲村组、黄马青组,上三叠统范家塘组和中、下侏罗统象山群(图1) (0周冲村组(TZ幻:出露于朝阳洞山和聚宝山的     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of