FOST PALEOZOIC FORMATIONS OF THE MN YIN AND LAI WU VALLEYS OF SHANTUNG.

INTRODUCTION. I was appointed to accompany Dr. J. G. Andersson to take a trip incentral Shantung. especially in Men Yin (蒙阴) and Lai Wu (莱芜),valleys,for the purpose of collecting fossils and observing the post-Palaeozoic forma-tions. We came back to Peking in December, 1922. The conclusion     

FOST PALEOZOIC FORMATIONS OF THE MN YIN AND LAI WU VALLEYS OF SHANTUNG.

INTRODUCTION. I was appointed to accompany Dr. J. G. Andersson to take a trip incentral Shantung. especially in Men Yin (蒙阴) and Lai Wu (莱芜),valleys,for the purpose of collecting fossils and observing the post-Palaeozoic forma-tions. We came back to Peking in December, 1922. The conclusion     

PROCEEDINGS§ OF THE TENTH ANNUAL MEETING OF THE GEOLOGICAL SOCIETY OF CHINA HELD IN PEIPING AT THE NATIONAL TSINGHUA UNIVERSITY,THE YENCHING UNIVERSITY, THE NATIONAL UNIVERSITY OF PEKING AND THE GEOLOGICAL SURVEY LIBRARY, ON NOVEMBER 11TH-13TH,1933.

The first meeting was opened by President J. S. Lee at 10 o'clock in the morning in the auditorium of the Biological Building of the National Tsinghua University. The President made a short opening remark in which he congratulated on the growing activity of the Society and welcome the new     

POSITIVE INVERSION STRUCTURE OF THE CENTRAL STRUCTURE BELT IN TURPAN-HAMI BASIN

The central structure belt in Turpan-Hami basin is composed of the Huoyanshan structure and Qiketai structure formed in late Triassic-early Jurassic, and is characterized by extensional tectonics. The thickness of strata in the hanging wall of the growth fault is obviously larger than that in the footwall, and a deposition center was evolved in the Taibei sag where the hanging wall of the fault is located. In late Jurassic the collision between Lhasa block and Eurasia continent resulted in the transformation of the Turpan-Hami basin from an extensional structure into a compressional structure, and consequently in the tectonic inversion of the central structure belt of the Turpan-Hami basin from the extensional normal fault in the earlier stage to the compressive thrust fault in the later stage. The Tertiary collision between the Indian plate and the Eurasian plate occurred around 55Ma, and this Himalayan orogenic event has played a profound role in shaping the Tianshan area, only the effect of the collision to this area was delayed since it culminated here approximately in late Oligocene-early Miocene. The central structure belt was strongly deformed and thrusted above the ground as a result of this tectonic event.     

EQUILIBRIUM MOLECULAR DYNAMICSCALCULATION OF THE SHEAR VISCOSITY OFWATER AT HIGH TEMPERATURSS AND PRESSURES

1.IntroductionFluidinfiltrationisaverycommonphenomenoninmanygeologicalprocesses.Assumingthatfluidflowislinearandthattherearenochemicalreactioninvolved,theinfiltrationprocesscanbedescribedbyDarcy'slaw:Q=~Ave(l)PWhereQisthevolumetricflowrateperunitarea,Kisthepermeabilityofrock,/tistheviscosityoffluid,andCPisthepressuregradient.Equation(1)showsthat,inordertounderstandanyfluidflowingprocess,it'snecessarytoknow,inthefirstplace,twoimportantparametersfthepermeabilityofrockandtheviscosityoffluid.T…     

THE STRUCTURE OF MINYA GONGKAR(貢噶) PRELIMINARY SKETCH,WITH Ⅰ SECTION AND 4 PHOTOGRAPHS.

The following sketch is presented through the invitation of Prof. Dr. Chu chia-hua. The chief object of the Szechuan-Tibet Expedition of Sunyatsen University~1, in 1930-31, was the geological study of the high mountains of the Tibetan     

CHARACTERIZATION AND FORMATION MECHANISM OF THE CENTRAL UPLIFT OF THE QIANGTANG BASIN

The Qiangtang basin is located between Kekexili-Jingshajiang suture belt and Bangong-Lujiang suture belt, and is divided into the north part and south part by the central uplift that has no crop out of Mesozoic strata. When the Jinshajiang Ocean was closed, the subducting plate was subducted southward. In the central part of the Qiangtang basin, the cushioning effect of the asthenosphere resulted in the thermal doming of the mantle and subsequent large-scale anatexis. Mantle source materials and antectic materials were upwelled and extruded into the middle crust, leading to the thickening of the middle crust and the heating and weakening of the middle to upper crust, and resulting in the rapid deformation (detachment) and tectonic erosion, and in the isostatic uplifting and the formation of metamorphic core complex. The upwelling of anatectic materials would further enhance the buoyant repercussion, which would combine with the side stress due from extrusion in resulting in the formation of an extension     

THE GEOLOGICAL STRUCTURE BETWEEN LENGCHI(冷磧) AND HSINMIAOTZE(新廟子),ON THE BOUNDARY OF HSIKANG AND SZECHUAN

Ⅰ. INTRODUCTION In the year 1930, Mr. Taichitao and Dr. Chuchiahua, then President and Vice-President of Sunyatsen University of Canton, were kind enough to offer me a chance to participate on the geological and topographical studies to     

ALLUVIAL STYLES AND ARCHITECTURE AS GUIDES TO CENOZOIC TECTONIC AND ENVIRONMENTAL EVENTS AT THE NORTHERN MARGINS OF THE QINGHAI—XIZANG PLATEAU

ALLUVIAL STYLES AND ARCHITECTURE AS GUIDES TO CENOZOIC TECTONIC AND ENVIRONMENTAL EVENTS AT THE NORTHERN MARGINS OF THE QINGHAI—XIZANG PLATEAU     

MICROSCOPIC CHARACTERISTICS OF AULT GOUGE AND THE ACTIVITY OF FAULTS

1. IntroductionThe slip of faults has two styles: steady slip calling creep slip and unsteady slip calling viscous slip. As to the possibility to induce strong earthquakes, creep slip faults are lower than viscous slip faults. Some faults show obvious geomorphic features, but have no records of large earthquakes. The faults of this kind may be mainly of creep slip. Earthquakes that they induced may be relatively smaller both in magnitude and in cycle. How faults exposed at surface had slipped…     

A GRAPHIC METHOD TO AID SPECIFIC DETERMINATION OF FUSULINOIDS AND SOME RESULTS OF ITS APPLICATION TO THE FUSULIN?E FROM N. CHINA.——WITH 2 PLATES AND 20 TEXT-FIGURES.

本篇分为三节:第一节论研究(竹廷)蜗之方法及其各部分之名称;并猎取古生物学家迄今历史之结果而加以批评。第二节专述中国北部已发见之(竹廷)蜗。第三节讨论本篇所述各种(竹廷)蜗生存之时代及其棲息流徙之情形。     

CENOZOIC BASIN EVOLUTION, STRUCTURAL STYLES OF THE QAIDAM AND AN ESTIMATE OF DENUDATION IN ADJACENT MOUNTAIN SYSTEMS, NORTHEAST QINGHAI—TIBETAN PLATEAU

CENOZOIC BASIN EVOLUTION, STRUCTURAL STYLES OF THE QAIDAM AND AN ESTIMATE OF DENUDATION IN ADJACENT MOUNTAIN SYSTEMS, NORTHEAST QINGHAI—TIBETAN PLATEAU     

A GRAPHIC METHOD TO AID SPECIFIC DETERMINATION OF FUSULINOIDS AND SOME RESULTS OF ITS APPLICATION TO THE FUSULIN?E FROM N. CHINA.——WITH 2 PLATES AND 20 TEXT-FIGURES.

本篇分为三节:第一节论研究(竹廷)蜗之方法及其各部分之名称;并猎取古生物学家迄今历史之结果而加以批评。第二节专述中国北部已发见之(竹廷)蜗。第三节讨论本篇所述各种(竹廷)蜗生存之时代及其棲息流徙之情形。     

BULLETIN OF THE XI''''AN INSTITUTE OF GEOLOGY AND MINERAL RESOURCES,THE CHINESE ACADEMY OF GEOLOGICAL SCIENCES TOTAL CONTENTS NO.21-24,1988

No.21Fundamental Geologieal一Teetonie Features and Struetural Controlled Proeess in Metallogenesis,Changba Pb一Zn Depo‘it ···························……Li Yig耐,Y。月9 Zh的gta”9 and Zhao Dez从(13)The Charaeters and Teetonie Signifieanee of Ophiolite First Diseovered in the East Kunlun Area ························……Gao Ya”“称,才“X记ngnong and Zuo Guocha。(28)A Preliminary Study on the Palaeoplate’Feetonies inshangluoArea…     

THE COLANGUIL BATHOLITH (29-31° S), CORDILLERA FRONTAL,ARGENTINA: STRUCTURE AND TECTONIC ENVIRONMENT

This paper assesses chemical-mineralogical changes resulting from hydrothermal alteration associated with granite-hosted gold mineralization in southern Salamanca province, Spain. Within the mineralized veins, along planes of quartz growth, two types of fluid inclusions were observed. One type is rich in CH₄ with minor CO₂, the other is rich in H₂O with CO₂ (± CH₄). These are interpreted as reflecting the immiscibility of an initial fluid rich in H₂O-CH₄ and some CO₂. Inclusions with similar composition are seen at the silicification formed at the granite contact with host rocks. However, differences in P-T conditions and immiscibility of fluids are indicated by the microthermometric study and relation of the inclusions. These are consistent with the temperatures calculated from the arsenopyrite-pyrite geothermometer. Formation temperatures of 445 ± 15° C were deduced for the mineralization at the granite contact and temperatures not exceeding 386° C for the vein mineralization.

Metasomatically altered granites are depleted in Na and K in comparison to fresh granites. A gain in CO₂ has been measured in the altered rocks. No correlation was found between gold contents and any of the major or trace elements analyzed.

δ³⁴S arsenopyrite values suggest a variable source of sulfur. Calculated δD_fluid values show significant variability (?66 to ?37%₀ SMOW), whereas δ¹⁸O fluid values show small variation (from +7.6 to +8.4%_o SMOW). These values for the fluids are consistent with interaction between magmatic fluids and metamorphic rocks. Gold deposition in quartz veins could be explained by the loss of H₂S during fluid immiscibility.     

PRESSURE GRADIENT FROM THE CONTRIBUTION OF BOTH GEOTHERMAL AND GRAVITY IN THE LITHOSPHERE

1 Introduction The pressure, a scalar quantity, is defined as P = F/S (F is force, S is the area for F) which can be widely used for both solid and fluid. The formula P = g ρh (g-gravitation acceleration,ρ-density, h-depth) is only used for even density static solid and fluid. The delivery of pressure in the fluid follows the law of Pascal, and the average pressure of uneven density fluid can be calculated with the formula of P = g ρh. The temperature influence on pressure is notHU Ba…